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Direct Vent Equipment

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

Direct vent appliance installed

Direct vent appliance installed

A direct-vent sealed-combustion furnace has dedicated pipes for combustion air and exhaust

A direct-vent sealed-combustion furnace has dedicated pipes for combustion air and exhaust

Publication Date

Thu, 02/07/2013 - 12:00

Furnaces, boilers, and water heaters located within the home’s pressure boundary are mechanically drafted or direct-vented

Furnaces, boilers, and water heaters located within the home’s pressure boundary are mechanically drafted or direct-vented

Because flue temperatures are cool, intake and exhaust ducts on a Category 4 direct-vent sealed-combustion condensing furnace can be made of PVC

Because flue temperatures are cool, intake and exhaust ducts on a Category 4 direct-vent sealed-combustion condensing furnace can be made of PVC

Publication Date

Thu, 02/07/2013 - 12:00

Combustion Furnaces

Guide describing combustion furnaces with selection and installation guidance.

Pre-Retrofit Assessment of Combustion Appliances

Information guide describing things to consider before attempting retrofits including any combustion appliances, or that may affect them.

Pre-Retrofit Assessment of Existing HVAC Systems

Information guide describing considerations for before retrofitting HVAC systems, retrofit scope considerations, and HVAC system replacement options.