Guides A-Z

Guide describing how to properly test the air barrier between the garage and house, and how to ensure the air barrier is tight enough to prevent garage air from entering 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)

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

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