Gas Furnace

A gas furnace provides heat to a home, and is more efficient than a heat pump when the temperature drops below 40°

The basic building blocks are as follows:

• A burner, through which gas (natural or propane) is burned
• A heat exchanger, which is a metal device that absorbs heat from the flames.
• A flue or vent pipe, to exhaust byproducts of combustion (such as water vapor and carbon dioxide)
• A fan motor which is responsible for pulling air from the home and forcing it through the heat exchanger to be heated

When your thermostat senses that the house is too cold, the flames ignite to heat up the heat exchanger and the fan motor begins pulling air from the home (return air duct). The air is forced through the heat exchanger, and it heated up by the heat exchanger. Then the air is sent back into your home via ductwork.

Get More Comfortable Advice: A variable speed fan will provide you with better efficiency, they are quieter and also keep your home more comfortable. Additionally, if you have indoor air quality products such as an advanced air cleaner or whole home humidifier, a variable speed fan is ideal because it regulates air flow through the home more often, thus keeping the air humidity and filtration at a more optimal level.

Furnace heating efficiency is measured by an Annual Fuel Utilization Efficiency (AFUE) percentage rating. A higher AFUE percentage indicates a more efficient furnace.

For a recommended HVAC heating contractor, please visit our dealer locater: heating contractor

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