Flashcards in C1-KS03 Deck (16)
a. Is a colorless, odorless gas that is lighter than air and highly toxic in higher quantities.
b. Combustion equipment, such as hot water heaters, should be direct vent (directly vented to the exterior of the building).
c. Carbon Monoxide Detectors should be installed in sleeping rooms and hallways. It is becoming common practice to install carbon monoxide detectors in residential applications.
-Is a radioactive, colorless, tasteless gas, occurring naturally as the decay of uranium and thorium.
-Radon gas from natural sources can accumulate in buildings, especially in confined areas such as attics and basements.
Radon can be mitigated in the following ways:
-Conducting Radon Testing to verify the amount of radon present
-Increase under floor ventilation
-Installing a radon sump pump in the basement
-Installing ventilation system to vent basements, attics, and raised floor foundations
-Visit the EPA's website to review "A Citizen's Guide To Radon" for more information.
Off-gassing of Volatile Organic Compounds (VOCs) , including glues and adhesives from:
VOC can be mitigated by:
-Specify low/no VOC products, i.e. products that contain little or no urea-formaldehyde.
-Building Envelopes are constructed tighter as we become more skilled at tightening the envelope, so it is even more important to specify low/no VOC products as the ability of VOCs to escape by "building leakage" has lessened.
-Provide adequate passive and mechanical ventilation to continually bring fresh air into the building.
Mold & Mildew
-Mold can occur in bathrooms, kitchens, laundry rooms, shower rooms, and other "wet areas"
-Caused by excessive moisture
-Lack of ventilation
Warm air temperature
-Install equipment to properly measure and control indoor air temperature and humidity:
• Install passive ventilation — operable windows, cross ventilation
• Install mechanical ventilation — direct venting to exterior of building
-Tiny particles of solid matter suspended in the air that are both natural and man-made
Naturally occurring particulates include:
Ash from forest fires, volcanoes as well as dust from dust storms
Vegetation — High pollen counts, allergies to pollen
Man-Made particulates include:
Burning of fossil fuels in vehicles, power plants, and other industrial processes
Mitigation Measures for better IAQ
-Maintenance of building ventilation systems
-Install Air Filters
-Incorporate fresh air into the building system through mechanical measures.
-Utilize passive design strategies — opening windows for natural ventilation when possible.
-Establish strict no smoking policy in building and within 50 feet of entry ways and operable windows.
-Local municipalities may have their own requirements.
Maintenance of building ventilation systems
-Regularly clean equipment and filters
-Replace old or outdated equipment
-Incorporate dehumidification or humidification equipment as required by the demands of the use of the building and its relation to the outdoor environment
Install Air Filters
-Install air filter equivalent to MERV (Minimum Efficiency Reporting Value) 13 or better for optimum performance
MERV Ratings with typical applications
17-20 (Electronics & Pharmaceutical manufacturing cleanroom )
13-16 (Hospital and General Surgery )
9-12 (Superior Residential, Better Commercial, Hospital Laboratories )
5-8 (Better Residential, General Commercial, Industrial Workspaces )
1-4 (Residential window AC units )
IAQ can be affected by:
-Microbial contaminants (mold and mildew)
- various gases ( carbon monoxide, radon, and VOCs)