Combustion Furnaces Description Guide describing combustion furnaces with selection and installation guidance.
Condensing Boilers Description Guide describing condensing boilers and hot water heat distribution systems used for home heating.
Condensing HVAC has Corrosion-Resistant Condensate Drain Pan Description Guide describing how to install a corrosion-resistant drain pan in condensate-producing HVAC equipment.
Direct Vent Equipment Description Guide describing categories of direct-vent combustion space- and water-heating equipment and combustion safety testing.
Existing HVAC System Upgrade or Expansion Description Guide describing how to upgrade or expand an existing HVAC system.
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.
Gas-Fired Boilers Description Guide describing gas-fired boilers and hot water heat distribution systems used for home heating.
Pre-Retrofit Assessment of Combustion Appliances Description Information guide describing things to consider before attempting retrofits including any combustion appliances, or that may affect them.
Proper Installation of Furnace and Air-Handler Filters Description Guide describing proper installation of high-MERV furnace and air-handler filters.
Unvented Combustion Appliances Description Guide describing how to properly ventilate un-vented combustion appliances such as sealed fireplaces.