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1974 - 2020
46 Years
of Service
1974 - 2020
46 Years
of Service
(925) 427-5522
Bay Area Heating, Plumbing & Air Conditioning Since 1974
Gas Furnace

Gas Furnaces

Furnaces are fueled typically by natural gas, and provide warm air in the winter. Furnace heating ability is measured with an Annual Fuel Utilization Efficiency (AFUE) percentage. Remember, a higher AFUE percentage indicates a more efficient furnace (See Efficiency Ratings Explained).

As mentioned above, a gas furnace uses natural gas, although some models can be converted to utilize propane. An electricity source is required to run the control systems, blower and some accessories.

A metal heat exchanger is heated, and cool air from your home is forced through the heat exchanger. Modern furnaces have variable speed fan motors for quiet operation. A condensing furnace is more efficient, but requires different venting than older furnaces did.

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