Guides A-Z

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

Guide describing design and installation of compact duct systems for central heating and cooling systems.

Guide describing buried ducts in loose-fill attic insulation, a method that can only be used in dry climates.

Guide describing approaches to burying and encapsulating ducts in unconditioned attics to increase the overall R-value of duct insulation.

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 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.

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