IAQ Models of Representative U.S. Homes Residential exposure analysis with CONTAM Andrew Persily National Institute of Standards and Technology Gaithersburg, MD [email protected], 301 975-6418 NSF/UL 440 Environments & Products Teleconference May 24, 2012
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IAQ Models of Representative U.S. Homes R esidential exposure analysis with CONTAM
IAQ Models of Representative U.S. Homes R esidential exposure analysis with CONTAM. Andrew Persily National Institute of Standards and Technology Gaithersburg, MD [email protected] , 301 975-6418 NSF /UL 440 Environments & Products Teleconference May 24, 2012. Topics for Today. - PowerPoint PPT Presentation
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HUD-funded effort to define a representative collection of houses based on U.S. building surveys (e.g., Census, DOE)– 209 dwellings that represent 80 % of the U.S. housing stock
Floor plans and CONTAM models available for
download
Variables used to define dwellings
Suite of Homes
Persily et al. 2006. A Collection of Homes to Representthe U.S. Housing Stock, NIST report NISTIR 7330.
Report, CONTAM files and floor plans: http://www.bfrl.nist.gov/IAQanalysis/case%20studies/cwcase_11.htm
Application “Suite of Homes”First statistically representative distribution of ventilation rates in U.S. homes
CONTAM models are being used for IAQ and exposure studies
Advantages: Established and documented; public domain; generates distribution instead of single value
Indoor CO exposure from emergency generatorsPersily et al. 2010. Indoor
Air. 20: 473-485.
Issues in modeling exposureBASIC QUESTIONSHow many dwellings: Which and why?Simulation duration: 24 h? Annual?Occupants: Number? Schedule?Contaminants: How many?
INPUTSWeather conditions: How many?Building tightness: Covered in suite modelsMechanical ventilation: Any? How much?Impose constant air change rate or calculate from leakage/weather?
Source strengths: Source areasRemoval mechanisms: Surface sorption? Air cleaning?