Air Seal HVAC Cabinet Seams Description Guide describing air sealing of the seams and holes in HVAC air handler and furnace cabinets.
Ducts Buried in Attic Insulation Description This guides describes buried ducts in loose-fill attic insulation, a method that can only be used in dry climates.
Encapsulated Ducts Description 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.