3.1602.7 Return and Supply Plenums in Basements and Crawl Spaces

Topic: 
Ducts
Subtopic: 
Duct Sealing
Desired Outcome: 
Connections between the crawl space/ unconditioned basement Unconditioned basement A below- or partially below-grade livable space with concrete or finished floor without intentional heating or cooling and living space eliminated to improve indoor air quality ( IAQ IAQ Indoor air quality ) and efficiency of the distribution system
TitleSpecification(s)Objective(s)
3.1602.7a
Supply plenums (includes conditioned crawl spaces)

Basements and crawl spaces that are used as heating and cooling supply plenums will not be allowed

Eliminate connection between the crawl space/ unconditioned basement Unconditioned basement A below- or partially below-grade livable space with concrete or finished floor without intentional heating or cooling and living space

3.1602.7b
Return plenums

Basements and crawl spaces that are used as heating and cooling return plenums will not be allowed

Eliminate connection between the crawl space/ unconditioned basement Unconditioned basement A below- or partially below-grade livable space with concrete or finished floor without intentional heating or cooling and living space