Indoor Environmental Air Quality - IEQ Flashcards
(IAQ - Minimum Indoor Air Quality Performance PRE) Where should the minimum outdoor air intake flow rate be found?
ASHRAE 62.1
(IAQ - Minimum Indoor Air Quality Performance PRE) How should mechanical air flow be monitored?
- 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
(IAQ - Minimum Indoor Air Quality Performance PRE) How should Naturally Ventilated Spaces be monitored?
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)
(IAQ - Environmental Tobacco Smoke Control PRE) What rules should all projects follow to protect inhabitants from tobacco smoke?
- Prohibit inside building
- No smoking within 25’ of all entries, intakes, and operable windows
- Signage for designated areas within 10’ of entry
(IAQ - Environmental Tobacco Smoke Control PRE) What considerations need to be made for a residential designated smoking area?
- Remove the smoke from the building
- Install deck-to-deck partitions
- Negative pressure differential exhaust
- Weatherstrip all doors and operable windows
(IAQ - Minimum Acoustical Performance PRE) What standard should be referenced when evaluating acoustic performance of materials?
ANSI S12.6
(IAQ - Minimum Acoustical Performance PRE) What is the maximum noise level for HVAC systems?
40 dBA
(IAQ - Minimum Acoustical Performance PRE) What considerations should be made for classrooms and core learning spaces that are less than 20,000sf?
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
(IAQ - Enhanced Indoor Air Quality Strategies) What are the requirements in the first Option when pursuing enhanced indoor air quality?
- 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
(IAQ - Enhanced Indoor Air Quality Strategies) What are additional air quality strategies in Option 2?
- Exterior Contamination Prevention
- Increase Ventilation
- CO2 monitoring
- Additional source control and monitoring
- Natural Ventilation Room-by-Room Calculations
(IAQ - Low-Emitting Materials) What are the two options for calculating how many low-emitting materials are in the project?
1 - Product Category Calculations
2 - Budget Calculation Method
(IAQ - Low-Emitting Materials) What are the categories of materials in regards to IAQ?
- Flooring
- Ceilings
- Walls
- Thermal and acoustic insulation
- Furniture
(IAQ - Indoor Air Quality Assessment) When should an indoor air quality assessment be performed?
After construction ends and the building has been completely cleaned. All interior finishes must be installed.
(IAQ - Indoor Air Quality Assessment) What is the key information for a Flush-out test before occupancy?
- Supply air volume of 14,000cf per square foot of area
- Maintain internal temperature of 60-80F
- Relative humidity no higher than 60%
(IAQ - Indoor Air Quality Assessment) What is the key information for a Flush-out test during building occupancy?
- Supply air volume of 3,500cf per square foot of area
- Maintain internal temperature of 60-80F
- Relative humidity no higher than 60%
(IAQ - Indoor Air Quality Assessment) What contaminants should be tested for in the air?
- Formaldehyde
- Particulates
- Ozone
- Total VOCs
- Carbon Monoxide
(IAQ - Thermal Comfort) What is the primary standard relating to HVAC and envelope that should be followed for thermal comfort?
ASHRAE 55
(IAQ - Thermal Comfort) What are the secondary standards that could be followed for the HVAC and envelope?
- ISO 7730
- CEN 15251
(IAQ - Thermal Comfort) What thermal comfort guidelines should healthcare projects follow?
- Provide thermal comfort controls for every patient room
- Provide thermal comfort controls for at least 50% of remaining individual occupant spaces
(IAQ - Interior Lighting) What are the basic considerations for Lighting Control in individual occupant spaces?
- Provided for at least 90% of these spaces
- At least 3 levels: On/Off/Midlevel (30-70%)
(IAQ - Interior Lighting) What are the basic considerations for shared multioccupant spaces?
- At least 3 levels: On/Off/Midlevel
- Separate control for presentations or projections
- Controls must be in direct line of site of the lights
(IAQ - Interior Lighting) When designing for light quality, what considerations should be made for brightness of lights?
- Use fixtures with a luminance of less than 2,500nits
- Direct lights between 45-90 degrees from nadir
(IAQ - Interior Lighting) When designing for light quality, what considerations should be made for the color of lights?
- Use a CRI of 80 or higher
(IAQ - Interior Lighting) When designing for light quality, how long should a light source last?
- 24,000 hours, for at least 75% of the lighting load
(IAQ - Interior Lighting) When designing for light quality, what percentage of the total connected lighting load should be direct-only overhead?
25% or less
(IAQ - Interior Lighting) When designing for light quality, how reflective should a project’s surfaces be?
- 85% ceilings
- 60% walls
- 25% floors
- 45% work surfaces
- 50% movable partitions
*for 90% of regularly occupied floor area
(IAQ - Daylight) What percentage of regularly occupied spaces should have glare-control devices
100%
(IAQ - Quality Views) What percentage of all regularly occupied floor area must have a direct line of sight to the outdoors?
75%
(IAQ - Quality Views) 75% of the regularly occupied floor area must have at least 2/4 of the following views:
- 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
(IAQ - Quality Views) How much of the required outdoor views can an atrium count for?
30%
(IAQ - Acoustic Performance) What are the high-level requirements of acoustic performance on most projects?
- HVAC background noise
- Sound Isolation
- Reverberation Time
- Sound Reinforcement/Masking
(IAQ - Acoustic Performance) What are some key numbers for sound quality in a school classroom?
- Background noise level of 35 dBA or less
- Exterior windows have STC rating of at least 35
(IAQ - Acoustic Performance) What are the two options for healthcare projects?
1) Speech privacy, sound isolation, and background noise
2) Acoustical finishes and site exterior noise
