3.1602.12 Air Sealing System Components

Topic: 
Ducts
Subtopic: 
Duct Sealing
Desired Outcome: 
Ducts and plenums sealed to prevent leakage
TitleSpecification(s)Objective(s)
3.1602.12a
Duct boot to interior surface

Gaps between boot and gypsum less than a ¼" will be sealed using mastic or appropriate flexible caulking

Gypsum edge will be wetted before applying mastic

Prevent air leakage

3.1602.12b
Air handler cabinet outside conditioned space

Joints will be sealed and cracks/holes not needed for proper function of unit will be sealed using removable sealant (e.g., foil tape)

Reduce air leakage while maintaining accessibility

3.1602.12c
Performance testing

Pre- and post-retrofit duct leakage will be performance tested using a duct blaster or pressure pan, and results will be documented and reported to the homeowner and/or program

Document post-retrofit duct leakage test has been performed