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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.

This guide can help you assess an existing Heating, Ventilation and Air Conditioning (HVAC) system for potential intervention such as repair, upgrade or expansion, or replacement.

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.