Direct Vent Equipment Description Guide describing categories of direct-vent combustion space- and water-heating equipment and combustion safety testing.
Fireplaces and Wood Stoves Have Proper Ventilation Description Guide describing how to provide combustion air for fireplaces and how to test fireplaces for combustion safety.
Sealed and Insulated Flex Ducts Description Guide describing how to air seal and insulate flex ducts.
Whole-House Ventilation Strategies for New Homes Description This guide describes how to install a whole-building ventilation system to provide adequate dilution of indoor air contaminants.