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

Guide describing how to install an exhaust fan in an attached garage to pull fumes out of the garage and to depressurize the garage with reference to the home.

Guide describing a method for insulating an unvented attic by spraying foam insulation along the underside of 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 air-seal bathroom and kitchen exhaust fans.

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

Guide describing how to use a blower door test to determine building envelope air leakage.