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Guide describing how to insulate a vented attic in an existing home using blown insulation added to the attic floor.

Guide describing how to increase insulation in existing homes by installing batt insulation on the ceiling plane of a vented attic.

Guide describing application of a radiant barrier layer in the attic to block radiant heat transfer between hot surfaces and heat-absorbing surfaces.

Guide describing how to apply spray foam insulation to ceilings in existing homes.

Guide describing how to add spray foam insulation to the underside of the existing roof deck as part of the conversion of a vented attic to an unvented, insulated attic.

Guide describing how to re-roof an existing home with a sloped and add insulation above the roof deck.

Guide describing the types of whole-house fans, installation details to reduce energy loss, and how to operate them for comfort and energy savings based on climate zone.

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 proper installation of high-MERV furnace and air-handler filters.

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 air sealed conditioned attic, basement, or crawl space.

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

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

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

Guide describing refrigerant-based compression-cooling air conditioning systems for space cooling.

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

Guide describing how to repair or replace skylights in existing homes.

Guide describing how to apply an air control layer directly over existing wall sheathing and cover with two layers of insulating sheathing held in place by vertical furring strips.

Guide describing condensing boilers and hot water heat distribution systems used for home heating.

Guide describing gas-fired boilers and hot water heat distribution systems used for home heating.