3.1602.4 Air Sealing System Components

Topic: 
Ducts
Subtopic: 
Duct Sealing
Desired Outcome: 
Ducts and plenums sealed to prevent leakage
TitleSpecification(s)Objective(s)
3.1602.4a
Duct boot to interior surface

All gaps between boot and interior surface that defines conditioned space will be air sealed

Gypsum edge will be wetted before applying water-based sealant

Sealants will be continuous and be in accordance with IRC IRC International Residential Code

Prevent air leakage

Prevent a fire hazard

3.1602.4b
Wooden plenums and building cavities

Accessible connections and joints will be made airtight using approved material

Ensure ducts and plenums will not leak

3.1602.4c
Air handler cabinet

Joints will be closed and cracks and holes not needed for proper function of unit will be sealed using removable sealant (e.g., foil tape) or in accordance with the original equipment manufacturer directions (if available)

Reduce air leakage while maintaining accessibility

3.1602.4d
Filter slot

A pre-manufactured or site manufactured durable filter slot cover will be installed

Reduce air leakage while maintaining accessibility