Furnaces Historical Data

Gas Warm Air Furnaces

A self-contained gas-burning appliance for heating air by transfer of heat of combustion through metal to the air, and designed to supply heated air through ducts to spaces remote from or adjacent to the appliance location.

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Gas Warm Air Furnaces Chart 2003-2022

 

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Gas Warm Air Furnaces Table 2003-2022

 

Oil Warm Air Furnaces

A self-contained oil-burning appliance for heating air by transfer of heat of combustion through metal to the air, and designed to supply heated air through ducts to spaces remote from or adjacent to the appliance location.

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Oil Warm Air Furnaces Chart 2003-2022

 

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Oil Warm Air Furnaces Table 2003-2022

 

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Furnaces Chart 2003-2022

 

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Furnaces Table 2003-2022