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

Guide describing a method for insulating an unvented attic by spraying foam insulation along the underside of the roof deck.

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 the retrofit of kitchen exhaust systems, including duct sizing and routing considerations.

Guide describing how to install a bathroom exhaust fan to remove excess moisture.

Guide describing how to install efficient kitchen exhaust systems.

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 select and install whole-house ventilation systems for 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.

No outdoor air intakes connected to return side of the HVAC system, unless controls are installed to operate intermittently & automatically based on a timer and to restrict intake when not in use (e.g., motorized damper)

This guide describes how to install a whole-building ventilation system to provide adequate dilution of indoor air contaminants.

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