Combustion Furnaces Description Guide describing combustion furnaces with compliance 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.
Ductless (Mini-Split) Heat Pumps Description Guide describing ductless heat pump systems used for single-room or whole-house heating and cooling.
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.
Oil-Fired Boilers Description Guide describing oil-fired boilers and hot water heat distribution systems used for home heating.
Traditional Split Heat Pumps Description Guide describing the split system heat pumps used for central forced air heating and cooling.
Whole-House Dehumidification Description Guide describing options for adding dehumidification equipment to a home to maintain indoor relative humidity below 60%.