Week 2: Air ✅

Question 1

What is the primary aim of the WELL Air concept?

Air > General

Answer 1

The primary aim of the WELL Air concept is to achieve high levels of indoor air quality across a building’s lifetime through diverse strategies, including source elimination or reduction, and active and passive building design and operation strategies.

This information comes from Page 10 of the WELL V2

Question 2

How much of people’s time is spent in enclosed spaces?

Air > General

Answer 2

People spend approximately 90% of their time in enclosed spaces.

This information comes from Page 10 of the WELL V2

Question 3

What are the most common indoor air contaminants?

Air > General

Answer 3

e most common indoor air contaminants include combustion sources like candles, tobacco products, stoves, furnaces, and fireplaces, as well as pollutants emitted by building materials, furnishings, fabrics, cleaning products, and personal care products.

This information comes from Page 10 of the WELL V2

Question 4

How was household air pollution ranked in a recent global burden of disease study?

Air > General

Answer 4

In a recent global burden of disease study, household air pollution was rated as the tenth most important cause of ill health for the world’s population.

This information comes from Page 10 of the WELL V2

Question 5

What is the primary goal of the WELL Air Concept?

Air > General

Answer 5

The primary goal of the WELL Air Concept is to implement holistic design strategies to promote clean air and minimize human exposure to harmful contaminants, aiming to maximize benefits to productivity, well-being, and health.

This information comes from Page 10 of the WELL V2

Question 6

What is the primary intent of the WELL feature regarding indoor air quality?

A01 AIR QUALITY | P

Answer 6

The primary intent is to provide a basic level of indoor air quality that contributes to the health and well-being of building users.

This information comes from Page 12 of the WELL V2

Question 7

What are some common air pollutants mentioned in the ISSUE section of the feature?

A01 AIR QUALITY | P

Answer 7

Common air pollutants include Volatile Organic Compounds (VOCs), ozone, particulate matter, carbon monoxide, and radon.

This information comes from Page 12 of the WELL V2

Question 8

Who establishes permissible levels for criteria pollutants, and how are these levels determined?

A01 AIR QUALITY | P

Answer 8

ermissible levels for criteria pollutants are established by organizations such as the World Health Organization (WHO) and the U.S. Environmental Protection Agency (EPA) based on epidemiological studies that show the relationships between pollutant concentrations, duration of exposure, and health risks.

This information comes from Page 12 of the WELL V2

Question 9

What strategies are available for managing indoor air quality?

A01 AIR QUALITY | P

Answer 9

Strategies include source control strategies, passive and active building design and operation strategies, and human behavior interventions. Effective mechanical ventilation is highlighted as particularly effective for reducing radon levels.

This information comes from Page 12 of the WELL V2

Question 10

What is the primary intent of the WELL feature related to smoking?

A02 SMOKE-FREE ENVIRONMENT | P

Answer 10

The primary intent is to deter smoking, minimize occupant exposure to secondhand smoke, and reduce smoke pollution.

This information comes from Page 16 of the WELL V2

Question 11

What are some health issues associated with exposure to tobacco smoke, according to the information provided?

A02 SMOKE-FREE ENVIRONMENT | P

Answer 11

Health issues associated with tobacco smoke include asthma attacks, respiratory infections, coronary heart disease, stroke, lung cancer, and sudden infant death syndrome.

This information comes from Page 16 of the WELL V2

Question 12

What percentage of the global population lives in countries not protected by 100% smoke-free regulations?

A02 SMOKE-FREE ENVIRONMENT | P

Answer 12

Despite adverse health impacts, 80% of the global population lives in countries not protected by 100% smoke-free regulations.

This information comes from Page 16 of the WELL V2

Question 13

How can projects prevent intrusion of cigarette smoke from outdoors, according to the information provided?

A02 SMOKE-FREE ENVIRONMENT | P

Answer 13

Projects can prevent intrusion of cigarette smoke by ensuring that smoking is not allowed in the vicinity of building entrances, operable windows, and building air intakes.

This information comes from Page 16 of the WELL V2

Question 14

What does Part 1 of the WELL feature related to smoking prohibit in all interior spaces within the project boundary?

A02 SMOKE-FREE ENVIRONMENT | P

Answer 14

Part 1 prohibits smoking and the use of e-cigarettes in interior spaces within the project boundary.

This information comes from Page 16 of the WELL V2

Question 15

According to Part 2 of the WELL feature, where is outdoor smoking prohibited within the project boundary?

A02 SMOKE-FREE ENVIRONMENT | P

Answer 15

Outdoor smoking is prohibited within 25 ft (7.5 m) of all entrances, operable windows, and building air intakes, as well as on decks, patios, balconies, rooftops, and other occupiable outdoor areas above ground level.

This information comes from Page 16 of the WELL V2

Question 16

What additional requirement is mentioned regarding outdoor smoking areas within the project boundary, as per Part 2 of the feature?

A02 SMOKE-FREE ENVIRONMENT | P

Answer 16

For outdoor areas allowing smoking, signs must be placed along walkways, not more than 100 ft (30 m) between signs, that describe the hazards of smoking.

This information comes from Page 16 of the WELL V2

Question 17

How should projects implement the smoking prohibitions according to WELL Core Guidance?

A02 SMOKE-FREE ENVIRONMENT | P

Answer 17

Projects should meet the smoking prohibitions in the whole building as per WELL Core Guidance.

This information comes from Page 16 of the WELL V2

Question 18

What is the primary objective of the WELL feature related to ventilation?

A03 VENTILATION DESIGN | P

Answer 18

The primary objective is to minimize indoor air quality issues by providing adequate ventilation.

This information comes from Page 18 of the WELL V2

Question 19

What are some symptoms associated with poorly ventilated spaces?

A03 VENTILATION DESIGN | P

Answer 19

Symptoms include headache, fatigue, dizziness, nausea, cough, sneezing, shortness of breath, and eye, nose, throat, and skin irritation, collectively referred to as sick building syndrome (SBS).

This information comes from Page 18 of the WELL V2

Question 20

What are some consequences of poorly ventilated spaces?

A03 VENTILATION DESIGN | P

Answer 20

Consequences include increased rates of employee absences, higher operational costs for businesses, and decreased productivity in students. One study estimates that 35% of total absenteeism can be attributed to insufficient provision of fresh air in buildings.

This information comes from Page 18 of the WELL V2

Question 21

What maintenance practices are recommended for mechanically ventilated projects to ensure adequate ventilation performance and indoor air quality?

A03 VENTILATION DESIGN | P

Answer 21

Mechanically ventilated projects need to perform regular system maintenance to prevent reduced ventilation performance and a deterioration in indoor air quality and thermal conditions.

This information comes from Page 18 of the WELL V2

Question 22

What are the requirements for mechanically ventilated spaces to ensure adequate ventilation, according to the WELL feature?

A03 VENTILATION DESIGN | P

Answer 22

Mechanically ventilated spaces must meet the supply and exhaust rates set in one or more specified ventilation guidelines, and the ventilation system should be tested and balanced after project occupancy.

This information comes from Page 18 of the WELL V2

Question 23

What are the design criteria for naturally ventilated projects with no mechanical ventilation, as outlined in the WELL feature?

A03 VENTILATION DESIGN | P

Answer 23

The design criteria include ventilation rates described in specified standards, such as the Natural Ventilation Procedure in ASHRAE 62.1-2010 or other relevant versions.

This information comes from Page 18 of the WELL V2

Question 24

What thresholds must outdoor air meet, as an average for the previous year, for projects pursuing the strategy of naturally ventilated spaces in areas with elevated particulate matter?

A03 VENTILATION DESIGN | P

Answer 24

For PM2.5, outdoor air must be less than 35 μg/m³, and for PM10, it must be less than 70 μg/m³.

This information comes from Page 18 of the WELL V2

Question 25

What verification method is required for ensuring compliance with ventilation requirements in mechanically ventilated spaces? ## Footnote A03 VENTILATION DESIGN | P

Answer 25

Compliance in mechanically ventilated spaces is verified through a **Letter of Assurance** from an engineer. ## Footnote *This information comes from Page 18 of the WELL V2*

Question 26

What limitation is placed on projects pursuing the strategy of naturally ventilated spaces in areas with elevated particulate matter, in terms of WELL Certification level? ## Footnote A03 VENTILATION DESIGN | P

Answer 26

These projects are limited to achieving a maximum certification level of **Silver**, regardless of the total points achieved. ## Footnote *This information comes from Page 18 of the WELL V2*

Question 27

What action must mixed mode projects take regarding ventilation when outdoor PM2.5 levels exceed 15 μg/m³? ## Footnote A03 VENTILATION DESIGN | P

Answer 27

Mixed mode projects must **use mechanical ventilation** when outdoor PM2.5 levels are above 15 μg/m³, based on measurements within 2.5 miles of the project. ## Footnote *This information comes from Page 18 of the WELL V2*

Question 28

What is the primary objective of the WELL feature focused on minimizing construction-related pollutants in indoor air? ## Footnote A04 CONSTRUCTION POLLUTION MANAGEMENT | P

Answer 28

The primary objective is to **protect indoor air quality** during building construction and renovation. ## Footnote *This information comes from Page 21 of the WELL V2*

Question 29

What health risks are associated with air pollution originating from construction and demolition works? ## Footnote A04 CONSTRUCTION POLLUTION MANAGEMENT | P

Answer 29

Air pollution from construction sites is associated with increased mortality due to chronic obstructive pulmonary disease and is positively correlated with respiratory diseases such **as increased emissions of PM10**. ## Footnote *This information comes from Page 21 of the WELL V2*

Question 30

What strategies are recommended to protect indoor air quality during building construction and renovation? ## Footnote A04 CONSTRUCTION POLLUTION MANAGEMENT | P

Answer 30

Strategies include envelope protection, moisture and dust management, filter replacement, air flush, and proper equipment selection to limit exposure to **construction-related contaminants**. ## Footnote *This information comes from Page 21 of the WELL V2*

Question 31

How can building construction and renovation impact indoor air quality, and what measures can be taken to mitigate this impact? ## Footnote A04 CONSTRUCTION POLLUTION MANAGEMENT | P

Answer 31

Construction activities can compromise indoor air quality by introducing dust, chemical vapors, and debris. Measures such as **air duct protection, moisture and dust management, filter replacement**, and appropriate equipment selection can help improve indoor air quality during construction. ## Footnote *This information comes from Page 21 of the WELL V2*

Question 32

What are the requirements for maintaining ducts during construction after project registration? ## Footnote A04 CONSTRUCTION POLLUTION MANAGEMENT | P

Answer 32

Ducts must either be **sealed and protected** from contamination or cleaned prior to installing registers, grills, and diffusers. ## Footnote *This information comes from Page 21 of the WELL V2*

Question 33

What criteria must filters meet if the ventilation system is operating during construction? ## Footnote A04 CONSTRUCTION POLLUTION MANAGEMENT | P

Answer 33

Filters must have a **PM10 removal rating of at least 70%** (e.g., ***MERV 8***), and all filters must be replaced prior to occupancy. ## Footnote *This information comes from Page 21 of the WELL V2*

Question 34

What procedures are recommended for moisture and dust management during construction to mitigate indoor air pollution, as per the WELL feature? ## Footnote A04 CONSTRUCTION POLLUTION MANAGEMENT | P

Answer 34

Recommended procedures include storing absorptive materials separately in a designated area, isolating active work areas from other spaces, **using walk-off mats** at entryways, and using dust guards or collectors on saws and similar tools. ## Footnote *This information comes from Page 21 of the WELL V2*

Question 35

How can construction pollution be mitigated to protect indoor air quality, according to the WELL feature? ## Footnote A04 CONSTRUCTION POLLUTION MANAGEMENT | P

Answer 35

Construction pollution can be mitigated by maintaining ducts, using appropriate filters, implementing moisture and dust management procedures, and using protective measures such as walk-off mats and dust guards. ## Footnote *This information comes from Page 21 of the WELL V2*

Question 36

What is the aim of the WELL feature related to indoor air quality enhancement? ## Footnote A05 ENHANCED AIR QUALITY | O

Answer 36

he aim is to **encourage and recognize** buildings with enhanced levels of indoor air quality that promote the health and well-being of people. ## Footnote *This information comes from Page 23-24 of the WELL V2*

Question 37

How does indoor air quality impact human health and productivity in buildings? ## Footnote A05 ENHANCED AIR QUALITY | O

Answer 37

Indoor air quality directly affects **health and well-being**, contributes to **productivity loss** in office buildings, and can disrupt **physical and cognitive development** in children. ## Footnote *This information comes from Page 23-24 of the WELL V2*

Question 38

What are some of the strategies for managing indoor air quality? ## Footnote A05 ENHANCED AIR QUALITY | O

Answer 38

Strategies include source control, passive and active building design, operation strategies, and human behavior intervention. ## Footnote *This information comes from Page 23-24 of the WELL V2*

Question 39

What are some of the benefits associated with enhanced indoor air quality? ## Footnote A05 ENHANCED AIR QUALITY | O

Answer 39

Enhanced air quality is correlated with improved health, cognitive and physical development, higher incomes, and better economic performance. ## Footnote *This information comes from Page 23-24 of the WELL V2*

Question 40

How many point can a project reach with the A05 Optimization (Enhanced Air Quality)? ## Footnote A05 ENHANCED AIR QUALITY | O

Answer 40

Maximum 4 points: 2 point for part 1 *(Meet Enhanced Thresholds For Particulate Matter)* 1 point for part 2 *(Meet Enhanced Thresholds For Organic Gases)* 1 point for part 3 *(Meet Enhanced Thresholds For Inorganic Gases)* ## Footnote *This information comes from Page 23-24 of the WELL V2*

Question 41

What are the enhanced thresholds for particulate matter (PM) that projects must meet to earn points? *We are looking for Pm2.5 levels and PM10 levels. There is 2 possibility ## Footnote A05 ENHANCED AIR QUALITY | O

Answer 41

Projects must comply with **PM2.5 levels of 12 µg/m³** or lower and **PM10 levels of 30 µg/m³** or lower to meet the enhanced thresholds. (For 1 point) Projects must comply with **PM2.5 levels of 10 µg/m³** or lower and **PM10 levels of 20 µg/m³** or lower to meet the enhanced thresholds. (For 2 points) ## Footnote *This information comes from Page 23-24 of the WELL V2*

Question 42

How are these enhanced thresholds for particulate matter verified? ## Footnote A05 ENHANCED AIR QUALITY | O

Answer 42

Verification is done through **performance testing**. ## Footnote *This information comes from Page 23-24 of the WELL V2*

Question 43

What are the threshold levels for organic gases that projects must meet to earn points? ## Footnote A05 ENHANCED AIR QUALITY | O

Answer 43

Projects must ensure that levels of acetaldehyde are 140 µg/m³ or lower, acrylonitrile are 5 µg/m³ or lower, benzene are 3 µg/m³ or lower, caprolactam are 2.2 µg/m³ or lower, formaldehyde are 9 µg/m³ or lower, naphthalene are 9 µg/m³ or lower, and toluene are 300 µg/m³ or lower. ## Footnote *This information comes from Page 23-24 of the WELL V2*

Question 44

Where should the threshold For Organic Gases levels be met within the building? ## Footnote A05 ENHANCED AIR QUALITY | O

Answer 44

These threshold levels must be met in **occupiable spaces** within the building. ## Footnote *This information comes from Page 23-24 of the WELL V2*

Question 45

What are the enhanced thresholds for inorganic gases that projects must meet to earn points? ## Footnote A05 ENHANCED AIR QUALITY | O

Answer 45

Projects must ensure that levels of **carbon monoxide** are 7 mg/m³ [6 ppm] or lower and **nitrogen dioxide** are 40 µg/m³ [21 ppb] or lower. ## Footnote *This information comes from Page 23-24 of the WELL V2*

Question 46

In which spaces should these enhanced thresholds for inorganic gases be met within the building? ## Footnote A05 ENHANCED AIR QUALITY | O

Answer 46

These enhanced thresholds for inorganic gases must be met in all spaces within the building. ## Footnote *This information comes from Page 23-24 of the WELL V2*

Question 47

How many point can a project reach with the A06 Optimization (Enhanced Ventilation Design)? | Answer most be given for WELL Certification and WELL Core ## Footnote A06 ENHANCED VENTILATION DESIGN | O

Answer 47

Maximum 3 points for WELL Certification and 5 points for WELL Core: 2|3 point for part 1 *(Increase Outdoor Air Supply)* 1|2 point for part 2 *(Improve Ventilation Effectiveness)* ## Footnote *This information comes from Page 25-27 of the WELL V2*

Question 48

What is the objective of the feature related to expelling internally generated pollutants and improving air quality? ## Footnote A06 ENHANCED VENTILATION DESIGN | O

Answer 48

The objective is to implement **advanced ventilation strategies** to achieve higher air quality levels, benefiting human health and productivity. ## Footnote *This information comes from Page 25-27 of the WELL V2*

Question 49

What are some issues associated with conventional ventilation standards? ## Footnote A06 ENHANCED VENTILATION DESIGN | O

Answer 49

Conventional ventilation standards typically aim for indoor air quality that is merely "acceptable," which may not adequately reduce the risk of adverse health effects. Additionally, even with proper ventilation, indoor pollutant concentrations can exceed outdoor levels. ## Footnote *This information comes from Page 25-27 of the WELL V2*

Question 50

How does demand-controlled ventilation contribute to improving indoor air quality? ## Footnote A06 ENHANCED VENTILATION DESIGN | O

Answer 50

Demand-controlled ventilation adjusts the delivery rate of outside air based on measured **CO2 levels** within the space, ensuring that occupants are exposed to lower concentrations of pollutants while minimizing additional energy use. ## Footnote *This information comes from Page 25-27 of the WELL V2*

Question 51

What is the significance of maintaining CO2 concentrations below 800 ppm in indoor spaces? ## Footnote A06 ENHANCED VENTILATION DESIGN | O

Answer 51

Studies suggest that maintaining CO2 concentrations below 800 ppm significantly reduces the risk of sick building syndrome symptoms, contributing to better indoor air quality and occupant well-being ## Footnote *This information comes from Page 25-27 of the WELL V2*

Question 52

What is the objective of the "Increase Outdoor Air Supply" feature? | *Part 1 of A06 | Option 1: Increased air supply* ## Footnote A06 ENHANCED VENTILATION DESIGN | O

Answer 52

The objective is to meet increased air supply rates in all occupiable spaces, exceeding the outdoor air supply rates described in ASHRAE 62.1-2010 by specified percentages. ## Footnote *This information comes from Page 25-27 of the WELL V2*

Question 53

How are points awarded for exceeding outdoor air supply rates in mechanically ventilated projects? | *Part 1 of A06 | Option 1: Increased air supply* ## Footnote A06 ENHANCED VENTILATION DESIGN | O

Answer 53

Points are awarded based on the percentage by which the outdoor air supply rates exceed the thresholds specified in ASHRAE 62.1-2010. Exceeding the rates by **30% earns 1 point**, while exceeding by **60% earns 2 points**. ## Footnote *This information comes from Page 25-27 of the WELL V2*

Question 54

How is compliance with the "Increase Outdoor Air Supply" feature verified? | *Part 1 of A06 | Option 1: Increased air supply* ## Footnote A06 ENHANCED VENTILATION DESIGN | O

Answer 54

Compliance is verified through a **Letter of Assurance** provided by the engineer involved in the project, confirming that the required outdoor air supply rates have been exceeded in all occupiable spaces. ## Footnote *This information comes from Page 25-27 of the WELL V2*

Question 55

What are the requirements for demand control ventilation (DCV) systems in mechanically ventilated projects? | *Part 1 of A06 | Option 2* *CO2 levels* ## Footnote A06 ENHANCED VENTILATION DESIGN | O

Answer 55

The DCV system must regulate outdoor air ventilation rates to maintain carbon dioxide (CO2) levels below specified thresholds based on maximum intended occupancy levels. **CO2 levels should be 900 ppm or 500 ppm above outdoor levels for 1 point**, or **750 ppm or 350 ppm above outdoor levels for 2 points**. ## Footnote *This information comes from Page 25-27 of the WELL V2*

Question 56

Where should carbon dioxide (CO2) levels be measured in the demand control ventilation system? | *Part 1 of A06 | Option 2: Demand control ventilation* ## Footnote A06 ENHANCED VENTILATION DESIGN | O

Answer 56

CO2 levels should be **measured at the return air diffusers or in the breathing zone** at least **3.3 ft away** from doors, windows, air supply diffusers, or occupants. At least one sensor should be used for each occupancy zone or per air handling unit if multiple units serve a single zone. ## Footnote *This information comes from Page 25-27 of the WELL V2*

Question 57

How is occupancy zoning handled in demand control ventilation systems? | *Part 1 of A06 | Option 2: Demand control ventilation* ## Footnote A06 ENHANCED VENTILATION DESIGN | O

Answer 57

If the occupancy density, pattern, or usage differs substantially in adjacent areas, each area must be considered a **separate zone**. ## Footnote *This information comes from Page 25-27 of the WELL V2*

Question 58

How are mixed-mode projects expected to select ventilation options? | *Part 1 of A06 | Option 3: Enhanced natural ventilation* ## Footnote A06 ENHANCED VENTILATION DESIGN | O

Answer 58

Mixed-mode projects must select the option corresponding to the **ventilation mode** (mechanical and natural ventilation) in **operation for the majority of operating hours** within the year. ## Footnote *This information comes from Page 25-27 of the WELL V2*

Question 59

What is the requirement for implementing enhanced natural ventilation in naturally ventilated projects? | *Part 1 of A06 | Option 3: Enhanced natural ventilation* ## Footnote A06 ENHANCED VENTILATION DESIGN | O

Answer 59

Naturally ventilated projects must implement **an engineered natural ventilation system sufficient to keep CO2 levels in the breathing zone** of all regularly occupied spaces below specified thresholds at the maximum intended occupancies. CO2 levels should be **900 ppm or 500 ppm above outdoor levels for 1 point**, or **750 ppm or 350 ppm above outdoor levels for 2 points**. ## Footnote *This information comes from Page 25-27 of the WELL V2*

Question 60

What is the purpose of implementing an engineered natural ventilation system in naturally ventilated projects? | *Part 1 of A06 | Option 3: Enhanced natural ventilation* ## Footnote A06 ENHANCED VENTILATION DESIGN | O

Answer 60

The purpose is to ensure that CO2 levels in the breathing zone of all regularly occupied spaces remain below specified thresholds at the maximum intended occupancies, thereby contributing to **enhanced indoor air quality**. ## Footnote *This information comes from Page 25-27 of the WELL V2*

Question 61

How is the implementation of a displacement ventilation system verified in a project? | *Part 2 of A06 | Option 1: Displacement ventilation system* ## Footnote A06 ENHANCED VENTILATION DESIGN | O

Answer 61

The implementation is verified through a **Letter of Assurance** provided by the Engineer ## Footnote *This information comes from Page 25-27 of the WELL V2*

Question 62

What is one of the requirements for implementing a displacement ventilation system in a project? | *Part 2 of A06 | Option 1: Displacement ventilation system* ## Footnote A06 ENHANCED VENTILATION DESIGN | O

Answer 62

The project must use a **displacement ventilation system in at least 90% of regularly occupied spaces**. The basis for design can be one of the following: ASHRAE Guidelines RP-949.9, ASHRAE 62.1-2019 (Section 6.2.1.2.1), or REHVA Guidebook No. 01 (Displacement Ventilation in non-industrial premises). ## Footnote *This information comes from Page 25-27 of the WELL V2*

Question 63

What are the requirements for implementing a personalized ventilation system in at least 50% of workstations? | *Part 2 of A06 | Option 2: Personalized ventilation system* ## Footnote A06 ENHANCED VENTILATION DESIGN | O

Answer 63

Outdoor air must be supplied in the **breathing zone** of occupants, with an airspeed of no greater than **50 fpm** at the occupant's head. Additionally, the **return air diffusers** must be located more than **9.8 ft above the floor**. ## Footnote *This information comes from Page 25-27 of the WELL V2*

Question 64

What percentage of workstations must meet the requirements for a personalized ventilation system? | *Part 2 of A06 | Option 2: Personalized ventilation system* ## Footnote A06 ENHANCED VENTILATION DESIGN | O

Answer 64

At least **50%** of the workstations in the project must meet the requirements for a **personalized ventilation system**. ## Footnote *This information comes from Page 25-27 of the WELL V2*

Question 65

How many point can a project reach with the A07 Optimization (Operable Windows)? | Answer most be given for WELL Certification and WELL Core ## Footnote A07 OPERABLE WINDOWS | O

Answer 65

WELL Certification: 2 Pt | WELL Core: 4 Pt *Part 1 Provide Operable Windows WELL Certification: 1 Pt | WELL Core: 2 Pt* *Part 2 Manage Window Use WELL Certification: 1 Pt | WELL Core: 2 Pt* ## Footnote *This information comes from Page 28-29 of the WELL V2*

Question 66

What is the aim of the WELL feature related to operable windows? ## Footnote A07 OPERABLE WINDOWS | O

Answer 66

The feature aims to **increase the supply of high-quality outdoor air** and **promote a connection to the outdoor environment** by encouraging building users to **open windows** when outdoor air quality is acceptable. ## Footnote *This information comes from Page 28-29 of the WELL V2*

Question 67

What productivity benefit is associated with naturally ventilated spaces according to studies? ## Footnote A07 OPERABLE WINDOWS | O

Answer 67

Studies have shown that there is a **7.7% productivity benefit** associated with **naturally ventilated spaces**. ## Footnote *This information comes from Page 28-29 of the WELL V2*

Question 68

What health outcomes are correlated with the inhalation of harmful indoor substances? ## Footnote A07 OPERABLE WINDOWS | O

Answer 68

Inhalation of harmful indoor substances is correlated with adverse health outcomes such as **infectious diseases, cancer, asthma, allergies, and other respiratory infections**. ## Footnote *This information comes from Page 28-29 of the WELL V2*

Question 69

How can educating and informing building users contribute to indoor air quality improvement? ## Footnote A07 OPERABLE WINDOWS | O

Answer 69

Educating and informing building users about when outdoor conditions are favorable for window opening can **reduce the generation and persistence of indoor air pollutants.** ## Footnote *This information comes from Page 28-29 of the WELL V2*

Question 70

What percentage of regularly occupied spaces must have operable windows for compliance? | Part 1 | Provide Operable Windows (1 Point) ## Footnote A07 OPERABLE WINDOWS | O

Answer 70

At least 75%. ## Footnote *This information comes from Page 28-29 of the WELL V2*

Question 71

How can projects meet the requirement if outdoor PM2.5 levels are high? | Part 1 | Provide Operable Windows (1 Point) ## Footnote A07 OPERABLE WINDOWS | O

Answer 71

By managing window use in conjunction with providing operable windows. ## Footnote *This information comes from Page 28-29 of the WELL V2*

Question 72

How can compliance with the window area requirement per floor be verified? | Part 1 | Provide Operable Windows (1 Point) ## Footnote A07 OPERABLE WINDOWS | O

Answer 72

Through on-site photographs and a letter of assurance from the designer. ## Footnote *This information comes from Page 28-29 of the WELL V2*

Question 73

What is the requirement for outdoor air measurement? | Part 2 | Manage Window Use (1 Point) ## Footnote A07 OPERABLE WINDOWS | O

Answer 73

**Outdoor levels of PM2.5, temperature, and humidity are monitored at intervals of at least once per hour**, based on a data-gathering station located within 2.5 mi of the building. This monitoring system may be operated by the project or by another entity (e.g., a government). ## Footnote *This information comes from Page 28-29 of the WELL V2*

Question 74

How often should outdoor air measurements be taken and from where? | Part 2 | Manage Window Use (1 Point) ## Footnote A07 OPERABLE WINDOWS | O

Answer 74

Outdoor air measurements should be taken at **least once per hour**, and the data-gathering station s**hould be located within 2.5 mi of the building**. ## Footnote *This information comes from Page 28-29 of the WELL V2*

Question 75

What are the conditions for window operation? | Part 2 | Manage Window Use (1 Point) ## Footnote A07 OPERABLE WINDOWS | O

Answer 75

Indicator lights at windows should cue occupants when the conditions outside are suitable for opening windows, **with PM2.5 levels at 15 µg/m³ or lower**, **dry-bulb temperature within 15 °F of indoor air temperature setpoint, and relative humidity at 65% or lower.** ## Footnote *This information comes from Page 28-29 of the WELL V2*

Question 76

How many point can a project reach with the A08 Optimization (Air Quality Monitoring and Awareness)? | Answer most be given for WELL Certification and WELL Core ## Footnote A08 AIR QUALITY MONITORING AND AWARENESS | O

Answer 76

WELL Certification: 2 Pt | WELL Core: 1.5 Pt *Part 1 Install Indoor Air Monitors WELL Certification: 1 Pt | WELL Core: 0.5 Pt* *Part 2 Promote Air Quality Awareness WELL Certification: 1 Pt | WELL Core: 1 Pt* ## Footnote *This information comes from Page 30-31 of the WELL V2*

Question 77

What does the WELL feature related to indoor air quality monitoring require? ## Footnote A08 AIR QUALITY MONITORING AND AWARENESS | O

Answer 77

The feature requires the **ongoing measurement of contaminant data** to **educate and empower occupants** about their environmental quality. ## Footnote *This information comes from Page 30-31 of the WELL V2*

Question 78

How many point can a project reach with the A09 Optimization (Pollution Infiltration Management)? | Answer most be given for WELL Certification and WELL Core ## Footnote A09 POLLUTION INFILTRATION MANAGEMENT | O

Answer 78

WELL Certification: 2 Pt | WELL Core: 4 Pt *Part 1 Design Healthy Entryways WELL Certification: 1 Pt | WELL Core: 2 Pt* *Part 2 Perform Envelope Commissioning WELL Certification: 1 Pt | WELL Core: 2 Pt* ## Footnote *This information comes from Page 33-34 of the WELL V2*

Question 79

What are some examples of activities that can lead to spikes in indoor air pollution? ## Footnote A08 AIR QUALITY MONITORING AND AWARENESS | O

Answer 79

Activities such as **cooking in the home** can lead to **rapid spikes in indoor air pollution**. ## Footnote *This information comes from Page 30-31 of the WELL V2*

Question 80

How can educating occupants about indoor air quality risks contribute to improving air quality? ## Footnote A08 AIR QUALITY MONITORING AND AWARENESS | O

Answer 80

Educating occupants about the **risks associated with elevated air pollutant exposures** and **actions they can take to reduce these risks** can encourage personal agency to seek out opportunities to **further curb indoor pollution levels**. ## Footnote *This information comes from Page 30-31 of the WELL V2*

Question 81

Why is real-time monitoring of indoor air quality important? ## Footnote A08 AIR QUALITY MONITORING AND AWARENESS | O

Answer 81

Real-time monitoring is necessary to** promptly fix any deviations in indoor quality metrics** and **minimize occupant exposure to pollutants** due to fluctuations in air quality throughout the day. ## Footnote *This information comes from Page 30-31 of the WELL V2*

Question 82

What parameters must the monitors deployed by the project measure? | Part 1|Install Indoor Air Monitors (1 Point) ## Footnote A08 AIR QUALITY MONITORING AND AWARENESS | O

Answer 82

Monitors must measure **at least three parameters**, including **carbon monoxide** (accuracy 1 ppm at values between 0 and 10 ppm) and **total VOCs** (accuracy 25% at 500 μg/m³). ## Footnote *This information comes from Page 30-31 of the WELL V2*

Question 83

What are the requirements for the placement of monitors according to the standard? | Part 1|Install Indoor Air Monitors (1 Point) ## Footnote A08 AIR QUALITY MONITORING AND AWARENESS | O

Answer 83

Monitors must be sited at l**ocations compliant with relevant parameters in the Performance Verification Guidebook**, with a density of at least **one sensor per 3500 ft2**. ## Footnote *This information comes from Page 30-31 of the WELL V2*

Question 84

What are the specified intervals for taking measurements of pollutants according to the standard? | Part 1|Install Indoor Air Monitors (1 Point) ## Footnote A08 AIR QUALITY MONITORING AND AWARENESS | O

Answer 84

Measurements must be taken at** intervals of no longer than 10 minutes for carbon dioxide and no longer than one hour for other pollutants**. ## Footnote *This information comes from Page 30-31 of the WELL V2*

Question 85

What is the protocol for maintaining monitors? | Part 1|Install Indoor Air Monitors (1 Point) ## Footnote A08 AIR QUALITY MONITORING AND AWARENESS | O

Answer 85

Monitors must be recalibrated or replaced annually, and projects must submit documentation attesting to their calibration or replacement annually through the WELL digital platform. ## Footnote *This information comes from Page 30-31 of the WELL V2*

Question 86

How often are data submitted according to the standard's reporting and maintenance requirements? | Part 1|Install Indoor Air Monitors (1 Point) ## Footnote A08 AIR QUALITY MONITORING AND AWARENESS | O

Answer 86

Data must be submitted annually through the WELL digital platform. ## Footnote *This information comes from Page 30-31 of the WELL V2*

Question 87

How is information about air quality measured in Part 1 made available to occupants? | Part 2|Promote Air Quality Awareness (1 Point) ## Footnote A08 AIR QUALITY MONITORING AND AWARENESS | O

Answer 87

Information about air quality is made available to occupants through **display screens prominently positioned at a height of 3.6–5.6 ft**, with at least one display per 3500 ft2 of regularly occupied space or hosted on a website or phone application accessible to occupants, **with signs indicating where the data may be accessed at a density of at least one sign per 3500 ft2 of regularly occupied space**. ## Footnote *This information comes from Page 30-31 of the WELL V2*

Question 88

What type of data is presented to occupants regarding air quality in Part 1 of this feature? | Part 2|Promote Air Quality Awareness (1 Point) ## Footnote A08 AIR QUALITY MONITORING AND AWARENESS | O

Answer 88

Data presented to occupants include **concentrations of the parameters measured** or **qualitative results of air quality** (e.g., colored-coded levels). ## Footnote *This information comes from Page 30-31 of the WELL V2*

Question 89

How many point can a project reach with the A09 Optimization (Pollution Infiltration Management)? | Answer most be given for WELL Certification and WELL Core ## Footnote A09 POLLUTION INFILTRATION MANAGEMENT | O

Answer 89

WELL Certification: 2 Pt | WELL Core: 4 Pt *Part 1 Design Healthy Entryways WELL Certification: 1 Pt | WELL Core: 2 Pt* *Part 2 Perform Envelope Commissioning WELL Certification: 1 Pt | WELL Core: 2 Pt* ## Footnote *This information comes from Page 33-34 of the WELL V2*

Question 90

What does the WELL feature related to building entrances aim to achieve? ## Footnote A09 POLLUTION INFILTRATION MANAGEMENT | O

Answer 90

The feature aims to **reduce transmission of air and pollutants from outdoors to indoors** through the building envelope and entrance. ## Footnote *This information comes from Page 33-34 of the WELL V2*

Question 91

How much outdoor air particle inhalation occurs while indoors according to research? ## Footnote A09 POLLUTION INFILTRATION MANAGEMENT | O

Answer 91

Research shows that approximately **65% of outdoor** air particle inhalation occurs while indoors. ## Footnote *This information comes from Page 33-34 of the WELL V2*

Question 92

What are some potential health risks associated with exposure to high levels of particulate matter indoors? ## Footnote A09 POLLUTION INFILTRATION MANAGEMENT | O

Answer 92

Exposure to high levels of particulate matter indoors can lead to **respiratory irritation, lung cancer, cardiovascular disease, and mortality.** ## Footnote *This information comes from Page 33-34 of the WELL V2*

Question 93

What are some measures recommended to minimize the introduction of pollutants into indoor air through building entrances? ## Footnote A09 POLLUTION INFILTRATION MANAGEMENT | O

Answer 93

Measures include installing **entryway walk-off systems** and/or **entryway air seals** at all main building entrances. ## Footnote *This information comes from Page 33-34 of the WELL V2*

Question 94

What are the requirements for building entry design? | Part 1 | Design Healthy Entryways (1 Point) ## Footnote A09 POLLUTION INFILTRATION MANAGEMENT | O

Answer 94

All regularly used entrances to the building must include an **entryway system composed of grilles, grates, slots, or rollout mats** that are at least the **width of the entrance and 10 ft long in the primary direction of travel**. Additionally, measures to slow the movement of air from outdoors to indoors include either a building entry vestibule with **two typically closed doorways** or revolving entrance doors. ## Footnote *This information comes from Page 33-34 of the WELL V2*

Question 95

How is maintenance of building entryway systems addressed? | Part 1 | Design Healthy Entryways (1 Point) ## Footnote A09 POLLUTION INFILTRATION MANAGEMENT | O

Answer 95

Building entryway systems must be **wet-cleaned at least once a week or as instructed by the manufacturer and vacuumed at least once a day or as instructed by the manufacturer**. ## Footnote *This information comes from Page 33-34 of the WELL V2*

Question 96

What is required for outdoor sport areas? | Part 1 | Design Healthy Entryways (1 Point) ## Footnote A09 POLLUTION INFILTRATION MANAGEMENT | O

Answer 96

All facilities adjacent to an outdoor sports field must have a staging area that separates the playing field from other internal areas to capture moisture and debris. ## Footnote *This information comes from Page 33-34 of the WELL V2*

Question 97

How are the requirements for outdoor sport areas verified? | Part 1 | Design Healthy Entryways (1 Point) ## Footnote A09 POLLUTION INFILTRATION MANAGEMENT | O

Answer 97

The requirements for outdoor sport areas are **verified through on-site photographs** and a **letter of assurance from the designer**. ## Footnote *This information comes from Page 33-34 of the WELL V2*

Question 98

What is required for the building envelope during the design and construction phase? | Part 2 | Perform Envelope Commissioning (1 Point) ## Footnote A09 POLLUTION INFILTRATION MANAGEMENT | O

Answer 98

The project must **use a façade engineer** responsible for defining the building envelope performance metrics at the concept design stage. Additionally, the building envelope performance requirements must be included in the **Basis of Design document** and **reflect the Owner's Project Requirements**. ## Footnote *This information comes from Page 33-34 of the WELL V2*

Question 99

What is included in the commissioning process for projects undergoing design and construction? | Part 2 | Perform Envelope Commissioning (1 Point) ## Footnote A09 POLLUTION INFILTRATION MANAGEMENT | O

Answer 99

The commissioning process includes envelope commissioning for **air infiltration and leakage**, which is reflected in the **specification and commissioning plan**. The envelope commissioning plan is also included in the project Operation & Maintenance (O&M) Manual. ## Footnote *This information comes from Page 33-34 of the WELL V2*

Question 100

How many point can a project reach with the A10 Optimization (Combustion Minimization)? | Answer most be given for WELL Certification and WELL Core ## Footnote A10 COMBUSTION MINIMIZATION | O

Answer 100

WELL Certification: 1 Pt | WELL Core: 2 Pt *Part 1 Manage Combustion WELL Certification: 1 Pt | WELL Core: 2 Pt* *Option 1: Appliance and heater combustion ban* *Option 2: Low-emission combustion sources* *Option 3: Engine exhaust reduction* ## Footnote *This information comes from Page 35-36 of the WELL V2*

Question 101

What is the primary objective of the WELL feature related to reducing human exposure to combustion-related air pollution? ## Footnote A10 COMBUSTION MINIMIZATION | O

Answer 101

The primary objective is to **utilize low-emission combustion products** or **eliminate combustion-based products entirely** to **reduce human exposure to combustion-related air pollution** from heating and transportation sources. ## Footnote *This information comes from Page 35-36 of the WELL V2*

Question 102

What are some common sources of combustion-related emissions? ## Footnote A10 COMBUSTION MINIMIZATION | O

Answer 102

Common sources include **space heating, cooking, and nearby transportation**. These activities produce pollutants such as **fine particles, nitrogen dioxide, and carbon monoxide**. ## Footnote *This information comes from Page 35-36 of the WELL V2*

Question 103

What are some health risks associated with elevated levels of carbon monoxide in indoor air? ## Footnote A10 COMBUSTION MINIMIZATION | O

Answer 103

Health risks include symptoms such as headaches, visual impairment, reduced cognitive functioning, and difficulty performing complex tasks. Severe exposure can lead to nausea, loss of consciousness, and even death. ## Footnote *This information comes from Page 35-36 of the WELL V2*

Question 104

What is suggested as a solution to reduce combustion-related air pollution in indoor environments? ## Footnote A10 COMBUSTION MINIMIZATION | O

Answer 104

**Opting for non-combustion or low-emission combustion products is recommended** as an important step toward reducing carbon monoxide, nitrogen dioxide, fine particles, and other combustion by-products in the air. ## Footnote *This information comes from Page 35-36 of the WELL V2*

Question 105

What is the requirement regarding combustion-based appliances and heaters in occupiable spaces? | Part 1| Manage Combustion (1 Point) ## Footnote A10 COMBUSTION MINIMIZATION | O

Answer 105

Combustion-based fireplaces, stoves, space heaters, ranges, and ovens **are not permitted** in occupiable spaces. ## Footnote *This information comes from Page 35-36 of the WELL V2*

Question 106

What are the requirements for combustion sources used in the project for heating, cooling, water heating, or power generation? | Part 1| Manage Combustion (1 Point) ## Footnote A10 COMBUSTION MINIMIZATION | O

Answer 106

Equipment used for these purposes must either comply with California’s South Coast Air Quality Management District emission rules for pollution, **be electric**, or **be supplied by district heating or cooling**. ## Footnote *This information comes from Page 35-36 of the WELL V2*

Question 107

How does the project address engine exhaust reduction? | Part 1| Manage Combustion (1 Point) ## Footnote A10 COMBUSTION MINIMIZATION | O

Answer 107

**Vehicle engine idling** for more than **30 seconds is prohibited** in all pick-up, drop-off, and parking areas at the building site controlled by the project. "No idling" signage indicating this rule must be present at these locations. ## Footnote *This information comes from Page 35-36 of the WELL V2*

Question 108

What types of vehicles are affected by the engine exhaust reduction requirement? | Part 1| Manage Combustion (1 Point) ## Footnote A10 COMBUSTION MINIMIZATION | O

Answer 108

The engine exhaust reduction requirement applies to all vehicles in **pick-up, drop-off, and parking areas** at the building site controlled by the project. ## Footnote *This information comes from Page 35-36 of the WELL V2*

Question 109

How many point can a project reach with the A11 Optimization (Source Separation)? | Answer most be given for WELL Certification and WELL Core ## Footnote A11 SOURCE SEPARATION | O

Answer 109

WELL Certification: 1 Pt | WELL Core: 0.5 Pt *Part 1 Manage Pollution and Exhaust WELL Certification: 1 Pt | WELL Core: 0.5 Pt* ## Footnote *This information comes from Page 37-38 of the WELL V2*

Question 110

What is the primary objective of the WELL feature related to indoor air quality preservation and olfactory comfort? ## Footnote A11 SOURCE SEPARATION | O

Answer 110

The primary objective is to **preserve indoor air quality** and **maximize olfactory comfort** in occupied spaces through the **isolation and proper ventilation of indoor pollution sources and chemical storage areas**. ## Footnote *This information comes from Page 37-38 of the WELL V2*

Question 111

What are some common indoor sources of air pollution? ## Footnote A11 SOURCE SEPARATION | O

Answer 111

Common indoor sources of air pollution include **cleaning products, office equipment, copy rooms producing ozone, bathrooms encouraging mold and mildew growth, and kitchens emitting particulate matter, VOCs, and polycyclic aromatic hydrocarbons.** ## Footnote *This information comes from Page 37-38 of the WELL V2*

Question 112

What strategies are recommended to address indoor air pollution sources? ## Footnote A11 SOURCE SEPARATION | O

Answer 112

The most effective strategies include **eliminating individual sources of pollution** or **capturing emissions at the source** to prevent their spread. Physical separation of pollution sources combined with direct ventilation exhaust systems is also suggested ## Footnote *This information comes from Page 37-38 of the WELL V2*

Question 113

Why is it important to properly ventilate and isolate indoor pollution sources? ## Footnote A11 SOURCE SEPARATION | O

Answer 113

Proper ventilation and isolation of indoor pollution sources are crucial to **protect individuals** from harmful emissions and maintain indoor air quality. This helps prevent health issues associated with exposure to pollutants like **VOCs, ozone, mold, and particulate matter**. ## Footnote *This information comes from Page 37-38 of the WELL V2*

Question 114

# For All spaces Except Dwelling Units What requirements apply to bathrooms, kitchens, cleaning rooms, chemical storage rooms, and high-humidity areas? | Part 1| Manage Pollution And Exhaust(1 Point) ## Footnote A11 SOURCE SEPARATION | O

Answer 114

These areas must meet one of the following: be separated from adjacent regularly occupied spaces with self-closing doors and/or vestibules, be negatively pressurized compared with adjacent regularly occupied spaces, or utilize exhaust fans venting return air outdoors and not recirculated. ## Footnote *This information comes from Page 37-38 of the WELL V2*

Question 115

# For Dwelling Units How are specific areas like bathrooms and kitchens required to be isolated or ventilated? | Part 1| Manage Pollution And Exhaust(1 Point) ## Footnote A11 SOURCE SEPARATION | O

Answer 115

Specific areas such as bathrooms and kitchens must either be **separated from adjacent regularly occupied spaces** with self-closing doors and/or vestibules, be negatively pressurized compared with adjacent regularly occupied spaces, or **utilize exhaust fans to vent return air outdoors and prevent recirculation.** ## Footnote *This information comes from Page 37-38 of the WELL V2*

Question 116

# For Dwelling Units How is exhaust air from ovens, cooking burners, and stove top cooking appliances handled? | Part 1| Manage Pollution And Exhaust(1 Point) ## Footnote A11 SOURCE SEPARATION | O

Answer 116

The exhaust air must be vented directly to the outdoors. ## Footnote *This information comes from Page 37-38 of the WELL V2*

Question 117

# For Dwelling Units What requirements apply to the placement of exhaust air outlets for range hoods? | Part 1| Manage Pollution And Exhaust(1 Point) ## Footnote A11 SOURCE SEPARATION | O

Answer 117

Exhaust air outlets must be separated from any air intakes by at least 10 ft, unless otherwise specified by local code. ## Footnote *This information comes from Page 37-38 of the WELL V2*

Question 118

# For Dwelling Units What is the minimum operating exhaust airflow rate for range hoods? | Part 1| Manage Pollution And Exhaust(1 Point) ## Footnote A11 SOURCE SEPARATION | O

Answer 118

The minimum operating exhaust airflow rate for range hoods is the greater of 100 cfm per linear foot of range hood width or 200 cfm. ## Footnote *This information comes from Page 37-38 of the WELL V2*

Question 119

How many point can a project reach with the A12 Optimization (Air Filtration)? | Answer most be given for WELL Certification and WELL Core ## Footnote A12 AIR FILTRATION | O

Answer 119

WELL Certification: 1 Pt | WELL Core: 2 Pt *Part 1 Implement Particle Filtration WELL Certification: 1 Pt | WELL Core: 2 Pt* *Option 1: Filtration levels* *Option 2: Filter maintenance* ## Footnote *This information comes from Page 39-40 of the WELL V2*

Question 120

What is the primary objective of the WELL feature related to air filtration? ## Footnote A12 AIR FILTRATION | O

Answer 120

The primary objective is to **reduce indoor and outdoor airborne contaminants** through the implementation of** adequate air filtration **in mechanically ventilated spaces and meeting outdoor air quality standards in naturally ventilated spaces. ## Footnote *This information comes from Page 39-40 of the WELL V2*

Question 121

What health risks are associated with exposure to particulate matter (PM)? ## Footnote A12 AIR FILTRATION | O

Answer 121

Exposure to particulate matter, such as **PM10 and PM2.5**, is associated with a range of negative health outcomes, including **respiratory-related conditions, cardiovascular complications, heart disease, and other cardiovascular complications** ## Footnote *This information comes from Page 39-40 of the WELL V2*

Question 122

How can adequate air filtration contribute to minimizing exposure to air pollution? ## Footnote A12 AIR FILTRATION | O

Answer 122

Adequate air filtration, through the selection and installation of media filters, can decrease exposure to particulate matter, reducing the risk of **cardiovascular disease** and **allergic respiratory disease**. ## Footnote *This information comes from Page 39-40 of the WELL V2*

Question 123

Why is regular filter maintenance critical for ensuring proper air filtration? ## Footnote A12 AIR FILTRATION | O

Answer 123

Regular filter maintenance is critical because overloaded filters, when loaded with particles, can restrict airflow rate, increase pressure drop, and result in a loss of **filtration efficiency**. ## Footnote *This information comes from Page 39-40 of the WELL V2*

Question 124

What is the requirement for filtration levels in the ventilation system according to the standard? | Part 1 | Implement Particle Filtration (1 Point) ## Footnote A12 AIR FILTRATION | O

Answer 124

Media filters used in the ventilation system must filter outdoor air supplied to the space based on specified thresholds for Annual Average Outdoor PM2.5, with minimum air filtration levels of: ≥80% for 23 µg/m³ or less (e.g., MERV 12 or M6), ≥90% for 24–39 µg/m³ (e.g., MERV 14 or F8), and ≥95% for 40 µg/m³ or greater (e.g., MERV 16 or E10). ## Footnote *This information comes from Page 39-40 of the WELL V2*

Question 125

How is filter maintenance addressed? | Part 1 | Implement Particle Filtration (1 Point) ## Footnote A12 AIR FILTRATION | O

Answer 125

Evidence of filter replacement according to the manufacturer's recommendation **must be submitted annually through the WELL digital platform**. ## Footnote *This information comes from Page 39-40 of the WELL V2*

Question 126

How many point can a project reach with the A13 Optimization (Enhanced Supply Air)? | Answer most be given for WELL Certification and WELL Core ## Footnote A13 ENHANCED SUPPLY AIR | O

Answer 126

WELL Certification: 1 Pt | WELL Core: 2 Pt *Part 1 Improve Supply Air WELL Certification: 1 Pt | WELL Core: 2 Pt* *Option 1: Air supply requirements* *Option 2: Filter maintenance* ## Footnote *This information comes from Page 41-42 of the WELL V2*

Question 127

What is the primary objective of the WELL feature related to indoor contamination and pollution sources? ## Footnote A13 ENHANCED SUPPLY AIR | O

Answer 127

The primary objective is to **mitigate risks** from indoor contamination and pollution sources, such as** infectious disease particles and volatile organic compounds (VOC)**. ## Footnote *This information comes from Page 41-42 of the WELL V2*

Question 128

What are some potential health effects associated with exposure to high concentrations of VOCs? ## Footnote A13 ENHANCED SUPPLY AIR | O

Answer 128

Health effects can include **irritation of the nose and pharynx, leukemia, Nasopharyngeal cancer, damage to the liver, kidneys, and central nervous system**. ## Footnote *This information comes from Page 41-42 of the WELL V2*

Question 129

How can recirculation of contaminated air in buildings be mitigated? ## Footnote A13 ENHANCED SUPPLY AIR | O

Answer 129

Recirculation of contaminated air can be mitigated by **supplying spaces with 100% outdoor air**, treating recirculated air with carbon filters, media filters, and/or Ultraviolet Germicidal Irradiation (UVGI), and using HEPA or near-HEPA filters **to remove virus particles**. ## Footnote *This information comes from Page 41-42 of the WELL V2*

Question 130

What are some methods mentioned for treating recirculated air to remove contaminants? ## Footnote A13 ENHANCED SUPPLY AIR | O

Answer 130

Methods include using **carbon filters** to remove VOCs and ozone, **HEPA or near-HEPA filters** to remove virus particles, and **Ultraviolet Germicidal Irradiation (UVGI)** systems to effectively disinfect air, either in the upper portion of the room or in the air ducts. ## Footnote *This information comes from Page 41-42 of the WELL V2*

Question 131

What are the air supply requirements for occupiable spaces? | Part 1 | Improve Supply Air (1 Point) ## Footnote A13 ENHANCED SUPPLY AIR | O

Answer 131

Occupiable spaces must utilize one of the following strategies: 100% outdoor air, partially recirculated air treated with activated carbon filter and either media filter with PM2.5 removal of ≥90% or UVGI within the ducts, or partially recirculated air with air purification/cleaning devices including activated carbon filter and media filter with PM2.5 removal of ≥90% or UVGI. ## Footnote *This information comes from Page 41-42 of the WELL V2*

Question 132

How are filters or air treatment devices maintained? | Part 1 | Improve Supply Air (1 Point) ## Footnote A13 ENHANCED SUPPLY AIR | O

Answer 132

Evidence of filter or device maintenance, including replacement according to the manufacturer's recommendation, must be **submitted annually through the WELL digital platform**. ## Footnote *This information comes from Page 41-42 of the WELL V2*

Question 133

What are the requirements for air treatment devices in occupiable spaces? | Part 1 | Improve Supply Air (1 Point) ## Footnote A13 ENHANCED SUPPLY AIR | O

Answer 133

Air treatment devices in occupiable spaces must **include activated carbon filter and either media filter with PM2.5 removal of ≥90% or UVGI**, with a quantity appropriate to the room volume or area based on manufacturer specification. ## Footnote *This information comes from Page 41-42 of the WELL V2*

Question 134

How many point can a project reach with the A14 Optimization (Microbe and Mold Control)? | Answer most be given for WELL Certification and WELL Core ## Footnote A14 MICROBE AND MOLD CONTROL | O

Answer 134

WELL Certification: 1 Pt | WELL Core: 2 Pt *Part 1 Implement Ultraviolet Air Treatment WELL Certification: 1 Pt | WELL Core: 2 Pt* *Option 1: UV system design* *Option 2: UV system maintenance and inspection* ## Footnote *This information comes from Page 43-44 of the WELL V2*

Question 135

What does the WELL feature related to building mechanical systems aim to achieve? ## Footnote A14 MICROBE AND MOLD CONTROL | O

Answer 135

The feature aims to **reduce or eliminate growth of microbes and mold** within the building mechanical system. ## Footnote *This information comes from Page 43-44 of the WELL V2*

Question 136

What are some potential health issues associated with exposure to mold in indoor environments? ## Footnote A14 MICROBE AND MOLD CONTROL | O

Answer 136

Exposure to mold in indoor environments can trigger **asthma, headaches, allergies, respiratory system disorders, hypersensitivity pneumonitis, allergic rhinitis, bronchitis, lung tumor development, eczema, and toxic mold syndrome**. ## Footnote *This information comes from Page 43-44 of the WELL V2*

Question 137

How can the growth of microorganisms and mold be prevented and mitigated within building mechanical systems? ## Footnote A14 MICROBE AND MOLD CONTROL | O

Answer 137

The growth of microorganisms and mold can be prevented and mitigated through **regular mold inspections** and **placement of microbe inactivation techniques**, such as Ultraviolet Germicidal Irradiation (UVGI) systems. ## Footnote *This information comes from Page 43-44 of the WELL V2*

Question 138

What benefits are associated with the implementation of UVGI systems in building mechanical systems? ## Footnote A14 MICROBE AND MOLD CONTROL | O

Answer 138

UVGI systems have been shown to **dramatically reduce mold and bacteria growth on cooling coils** and destroy microbial films that accumulate on their surfaces. Additionally, implementing UVGI systems is associated with a **reduction in viable microorganisms and respiratory disorders **in the workplace. ## Footnote *This information comes from Page 43-44 of the WELL V2*

Question 139

What is the requirement regarding ultraviolet lamps for central air handling units? | Part 1 | Implement Ultraviolet Air Treatment (1 Point) ## Footnote A14 MICROBE AND MOLD CONTROL | O

Answer 139

## Footnote *This information comes from Page 43-44 of the WELL V2*

Question 140

How are cooling coils and drain pans associated with fan coil units addressed in terms of maintenance and cleaning? | Part 1 | Implement Ultraviolet Air Treatment (1 Point) ## Footnote A14 MICROBE AND MOLD CONTROL | O

Answer 140

Cooling coils and drain pans associated with fan coil units must **either be irradiated by ultraviolet lamps or be opened for inspection for mold growth and cleaned if necessary.** ## Footnote *This information comes from Page 43-44 of the WELL V2*

Question 141

How is maintenance of ultraviolet lamps and cooling coils without ultraviolet lamps addressed? | Part 1 | Implement Ultraviolet Air Treatment (1 Point) ## Footnote A14 MICROBE AND MOLD CONTROL | O

Answer 141

Evidence of ultraviolet lamp replacement or maintenance according to the manufacturer's recommendation must be **submitted annually through the WELL digital platform**. Additionally, cooling coils without ultraviolet lamps must be inspected quarterly for mold growth and cleaned if necessary, with dated photos demonstrating adherence submitted annually through the WELL digital platform. ## Footnote *This information comes from Page 43-44 of the WELL V2*