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Guide describing how to air seal and insulate flex ducts.

Guide describing how to air seal and insulate metal ducts.

Guide describing the practice of burying HVAC ducts in loose-fill insulation on the attic floor.

Guide describing approaches to burying and encapsulating ducts in unconditioned attics to increase the overall R-value of duct insulation.

Guide describing how to install jump ducts in bedroom walls to balance air pressures between rooms, enabling stale air to return of the central air handler, even when room doors are closed.

Guide describing how to hang HVAC ducts with supporting straps or saddles to adequately support ducts so they do not sag and are not pinched or compressed.

Guide describing the use of ducted returns to return stale air from bedrooms and bathrooms to a central heating system.

Guide describing how and where to install ducts, to ensure enough cavity space to avoid compression of the flex ducts or duct insulation.

Guide describing how to correctly install flex ducts without excessive coils or loops.

Guide describing how to correctly install flex ducts without kinks or sharp bends.

Guide describing the use of building cavities as supply or return ducts.

Guide describing how to design HVAC systems to be located within the conditioned space of the home, either in a utility closet or in an attic, basement, or crawl space.

Guide describing the use of building cavities as supply or return ducts.

Guide describing how to thoroughly seal HVAC ducts to ensure air delivery without leakage, and to ensure economical and quiet performance of the HVAC system.

Guide describing removal of construction debris from flex ducts and protection of ducts and HVAC equipment during construction to keep them free of dust and debris.