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

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 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 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.

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

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