Guides A-Z

Guide describing categories of direct-vent combustion space- and water-heating equipment and combustion safety testing.

Guide describing how to provide combustion air for fireplaces and how to test fireplaces for combustion safety.

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 how to air seal and insulate flex ducts.

Guide describing the use and testing of programmable thermostats.

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