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Guides A-Z

Guide describing combustion furnaces with compliance and installation guidance.

Guide describing condensing boilers and hot water heat distribution systems used for home heating.

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

Guide describing how to provide combustion air for fireplaces and how to test fireplaces for combustion safety.

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

Guide describing oil-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.