HVAC -

Ducts

Guide describing how to air-seal duct and flue shafts.

Guide describing buried ducts in loose-fill attic insulation, a method that can only be used in dry climates.

Guide for designing and installing interior ducts in an interstitial floor cavity in new and existing homes.

Guide describing how to air seal around duct shafts and flues installed through ceilings, walls and flooring in new and existing homes.