Guides A-Z

Guide describing combustion furnaces with compliance and installation guidance.

Guide describing method for installing ducts in a duct chase above a dropped ceiling.

Guide describing how to upgrade or expand an existing HVAC system.

Guide describing gas-fired boilers and hot water heat distribution systems used for home heating.

Guide describing sizing and installation of foundation heat exchangers, which can be connected to a heat pump system used for spacing conditioning as well as domestic water heating.

Guide describing oil-fired boilers and hot water heat distribution systems used for home heating.

Guide describing best practice venting strategies for existing steam heating systems in multifamily buildings.

Guide describing additional requirements for HVAC systems in warm-humid climates to operate in a dehumidification mode to maintain indoor relative humidity at or below 60 percent.