Guides A-Z

Guide describing air sealing of the seams and holes in HVAC air handler and furnace cabinets.

Guide describing how to air seal duct and flue shafts. 

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

Information guide providing background information about air flow in residential buildings.

Guide describing correct ducting for exhaust fans.

Guide describing design and installation of compact duct systems for central heating and cooling systems.

Guide describing method for designing and installing ducts in a raised ceiling chase. 

Guide describing how to conduct duct leakage tests on all components of the HVAC system (including the air handler, ductwork, register boxes/boots, and all air devices such as diffusers, registers, or grilles).

Guide describing how to install ducted returns in bedroom walls to balance air pressures between rooms and to enable stale air to return to a central heating system's air handler for reconditioning even when room doors are closed.

This guides describes buried ducts in loose-fill attic insulation, a method that can only be used in dry climates.

This guide describes approaches to buryng and encapsulating ducts in unconditioned attics to increase the overall R-value of duct insulation.

Guide describing method for installing ducts in a duct chase above a dropped ceiling.

Guide that illustrates how and when to encapsulate ductwork in unconditioned attics, increases the R-value of duct insulation, mitigating condensation issues and reducing air leakage.

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 how to install jump ducts in bedroom walls to balance air pressures between rooms and to enable stale air to return to a central heating system's air handler for reconditioning even when room doors are closed.

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 air sealed conditioned attic, basement, or crawl space.

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

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

Information guide describing how to assess and remediate combustion issues before conducting renovations in existing homes.

Retrofit guide describing how to assess harmful gasses such as carbon monoxide, sulfur oxides, nitrogen oxides, and soot from existing combustion appliances.

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.

Guide describing how to air seal and insulate fiber board ducts.

Guide describing how to air seal and insulate flex ducts.

Guide describing how to air seal and insulate metal ducts.

This measure guide describes how to correctly install ducts, ensuring enough cavity space to avoid compression.

Guide describing how to hang ducts with supporting straps or saddles to adequately support ducts so they do not sag and are not pinched or compressed in a manner that would cause damage to the ducts, the duct insulation, or the duct air barrier covering.

Guide describing how to conduct duct leakage tests per RESNET protocols.

Guide describing how to install transfer grilles in bedroom walls to balance air pressures between rooms and to enable stale air to return to a central heating system's air handler for reconditioning even when room doors are closed.

Guide describing how to undercut the doors  in bedroom walls to balance air pressures between rooms and to enable stale air to return to a central heating system's air handler for reconditioning even when room doors are closed.

Guide with information about how to install flashing integrated with air and water control layers around piping, vents, and other wall penetrations as part of an exterior wall retrofit.

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