Smith & Willis has been installing furnaces in the Denver area since 2002. Denver gets cold in the winter, so having a working furnace is a must. Many of our clients are curious as to how their furnaces actually work so they can better take care of them.

How an Oil Furnace Works

First, the thermostat must be turned on. This makes the burner at the bottom of the unit spray droplets of oil and air into the combustion chamber and ignite. The hot gas flows through the heat exchanger and then out of the exhaust stack. The blower pulls in air through the unit’s return duct and pushes it through the heat exchanger for it to be warmed. The heated return air then flows out from the plenum into the supply ducts, and from there, it flows to registers throughout the house.

How a Gas Furnace Works

Again, the thermostat tells the gas furnace to start making heat. The gas control then sends gas to a burner assembly to be ignited by the pilot light. The warmed gas rises through the heat exchanger and exits through the chimney while the blower pulls in air through the return duct and the filter. The cool air flows up through the heat exchanger and is heated. As with the oil furnace, the heated return air passes out from the plenum to the rest of the house.

How an Electrical Furnace Works

Also called an electric-resistance furnace, this type of furnace doesn’t need a heat exchanger or a flue. When the thermostat is turned on, heating elements in the unit turn on, and a blower moves the air through them. This heats the air, which rises through the plenum, enters the ducts and ultimately enters the rooms.

Call Us for More Information About Your Furnace

If you want more information about your furnace or need furnace installation, don’t hesitate to call Smith & Willis. We are pleased to serve clients in Denver and the surrounding area.