Indoor Environmental Air Quality - IEQ

Question 1

(IAQ - Minimum Indoor Air Quality Performance PRE) Where should the minimum outdoor air intake flow rate be found?

Answer 1

ASHRAE 62.1

Question 2

(IAQ - Minimum Indoor Air Quality Performance PRE) How should mechanical air flow be monitored?

Answer 2

• VAV systems, use a measurement device capable of measuring the minimum intake flow with +/-10% accuracy.
• Constant volume systems, install current transducer or supply fan

Question 3

(IAQ - Minimum Indoor Air Quality Performance PRE) How should Naturally Ventilated Spaces be monitored?

Answer 3

One of the following

• Direct exhaust airflow measurement device
• Automatic indication devices on all openings
• CO2 monitors in each thermal zone (3-6’ off the ground)

Question 4

(IAQ - Environmental Tobacco Smoke Control PRE) What rules should all projects follow to protect inhabitants from tobacco smoke?

Answer 4

• Prohibit inside building
• No smoking within 25’ of all entries, intakes, and operable windows
• Signage for designated areas within 10’ of entry

Question 5

(IAQ - Environmental Tobacco Smoke Control PRE) What considerations need to be made for a residential designated smoking area?

Answer 5

• Remove the smoke from the building
• Install deck-to-deck partitions
• Negative pressure differential exhaust
• Weatherstrip all doors and operable windows

Question 6

(IAQ - Minimum Acoustical Performance PRE) What standard should be referenced when evaluating acoustic performance of materials?

Answer 6

ANSI S12.6

Question 7

(IAQ - Minimum Acoustical Performance PRE) What is the maximum noise level for HVAC systems?

Answer 7

40 dBA

Question 8

(IAQ - Minimum Acoustical Performance PRE) What considerations should be made for classrooms and core learning spaces that are less than 20,000sf?

Answer 8

Option 1 - Confirm ceiling finishes (100%) have Noise Reduction Coefficient of 0.7 or higher

Option 2 - All other sound-absorbent finishes exceed the total ceiling area in the room and have NRC of 0.7 or higher

Question 9

(IAQ - Enhanced Indoor Air Quality Strategies) What are the requirements in the first Option when pursuing enhanced indoor air quality?

Answer 9

• Use 10’+ long entryway systems
• Prevent interior cross-contamination (exhaust hazards separately)
• Filtration, use MERV 13
• Natural Ventilation Design Calculation in CIBSE
• Mixed-Mode Design Calculations in CIBSE

Question 10

(IAQ - Enhanced Indoor Air Quality Strategies) What are additional air quality strategies in Option 2?

Answer 10

• Exterior Contamination Prevention
• Increase Ventilation
• CO2 monitoring
• Additional source control and monitoring
• Natural Ventilation Room-by-Room Calculations

Question 11

(IAQ - Low-Emitting Materials) What are the two options for calculating how many low-emitting materials are in the project?

Answer 11

1 - Product Category Calculations

2 - Budget Calculation Method

Question 12

(IAQ - Low-Emitting Materials) What are the categories of materials in regards to IAQ?

Answer 12

• Flooring
• Ceilings
• Walls
• Thermal and acoustic insulation
• Furniture

Question 13

(IAQ - Indoor Air Quality Assessment) When should an indoor air quality assessment be performed?

Answer 13

After construction ends and the building has been completely cleaned. All interior finishes must be installed.

Question 14

(IAQ - Indoor Air Quality Assessment) What is the key information for a Flush-out test before occupancy?

Answer 14

• Supply air volume of 14,000cf per square foot of area
• Maintain internal temperature of 60-80F
• Relative humidity no higher than 60%

Question 15

(IAQ - Indoor Air Quality Assessment) What is the key information for a Flush-out test during building occupancy?

Answer 15

• Supply air volume of 3,500cf per square foot of area
• Maintain internal temperature of 60-80F
• Relative humidity no higher than 60%

Question 16

(IAQ - Indoor Air Quality Assessment) What contaminants should be tested for in the air?

Answer 16

• Formaldehyde
• Particulates
• Ozone
• Total VOCs
• Carbon Monoxide

Question 17

(IAQ - Thermal Comfort) What is the primary standard relating to HVAC and envelope that should be followed for thermal comfort?

Answer 17

ASHRAE 55

Question 18

(IAQ - Thermal Comfort) What are the secondary standards that could be followed for the HVAC and envelope?

Answer 18

• ISO 7730

- CEN 15251

Question 19

(IAQ - Thermal Comfort) What thermal comfort guidelines should healthcare projects follow?

Answer 19

• Provide thermal comfort controls for every patient room

- Provide thermal comfort controls for at least 50% of remaining individual occupant spaces

Question 20

(IAQ - Interior Lighting) What are the basic considerations for Lighting Control in individual occupant spaces?

Answer 20

• Provided for at least 90% of these spaces

- At least 3 levels: On/Off/Midlevel (30-70%)

Question 21

(IAQ - Interior Lighting) What are the basic considerations for shared multioccupant spaces?

Answer 21

• At least 3 levels: On/Off/Midlevel
• Separate control for presentations or projections
• Controls must be in direct line of site of the lights

Question 22

(IAQ - Interior Lighting) When designing for light quality, what considerations should be made for brightness of lights?

Answer 22

• Use fixtures with a luminance of less than 2,500nits

- Direct lights between 45-90 degrees from nadir

Question 23

(IAQ - Interior Lighting) When designing for light quality, what considerations should be made for the color of lights?

Answer 23

• Use a CRI of 80 or higher

Question 24

(IAQ - Interior Lighting) When designing for light quality, how long should a light source last?

Answer 24

• 24,000 hours, for at least 75% of the lighting load

Question 25

(IAQ - Interior Lighting) When designing for light quality, what percentage of the total connected lighting load should be direct-only overhead?

Answer 25

25% or less

Question 26

(IAQ - Interior Lighting) When designing for light quality, how reflective should a project's surfaces be?

Answer 26

- 85% ceilings - 60% walls - 25% floors - 45% work surfaces - 50% movable partitions *for 90% of regularly occupied floor area

Question 27

(IAQ - Daylight) What percentage of regularly occupied spaces should have glare-control devices

Answer 27

100%

Question 28

(IAQ - Quality Views) What percentage of all regularly occupied floor area must have a direct line of sight to the outdoors?

Answer 28

75%

Question 29

(IAQ - Quality Views) 75% of the regularly occupied floor area must have at least 2/4 of the following views:

Answer 29

- Multiple lines of sight outdoors at least 90 degrees apart - Include 2: 1) flora, fauna, sky 2) movement 3) objects 25 feet from exterior - Views within the distance of 3x the height of the glazing - Views with a view factor of 3 or greater

Question 30

(IAQ - Quality Views) How much of the required outdoor views can an atrium count for?

Answer 30

30%

Question 31

(IAQ - Acoustic Performance) What are the high-level requirements of acoustic performance on most projects?

Answer 31

- HVAC background noise - Sound Isolation - Reverberation Time - Sound Reinforcement/Masking

Question 32

(IAQ - Acoustic Performance) What are some key numbers for sound quality in a school classroom?

Answer 32

- Background noise level of 35 dBA or less | - Exterior windows have STC rating of at least 35

Question 33

(IAQ - Acoustic Performance) What are the two options for healthcare projects?

Answer 33

1) Speech privacy, sound isolation, and background noise | 2) Acoustical finishes and site exterior noise