Furnace Efficiency Tips

Create a more efficient furnace to lower cost and conserve energy.
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Furnace heating costs can be quite high, since warming a space requires a lot of energy, but your expenses may be higher than they have to be. There are a few ways that you can make your furnace operate more efficiently that will save you money.


The filter located at the air return of your furnace pulls in more than air. It also sucks up dust and other airborne debris, which can clog the filter. A furnace has difficulty pulling in air to reheat if the filter is partially blocked, which in turn requires it to work harder and longer to pull the air through the system. Changing the filters once a month will keep this from being an issue.

Insulate Heat Transfer Areas

Your windows give you a way to see the world. But they also allow a heated room to cool quicker than it otherwise would. Any warm air that comes in contact with the cold glass, cooled by the air outside, will immediately cool. The more exposed windows you have, the more your furnace is going to turn on in order to reheat the room. Cover glass with blinds and curtains to add a layer of insulation.

Seal Cracks

Cracks around doors and windows and chimneys let warm air escape, and cause the furnace to work harder. Save your system and your pocketbook by adding insulation strips to doors and windows to keep the air from escaping. Close the flue on the chimney when you aren't using it, and add doors to the front of the fireplace to keep air from flowing out.


You might think your furnace is running just fine, but that doesn't mean that it cannot run better. Call in a qualified technician once a year to give the unit a checkup. The technician can ensure that the system is running at its optimum level and fix any issues.


Adjusting the temperature on the thermostat to a lower setting will allow the unit to take more rests and work less often, which conserves the most energy. Consider lowering the temperature even more in the evening when you are in bed and under covers. Adjust it down when you are out of the house for long periods. If you like coming home to a warm house and don't want to wait for it to heat up, invest in a programmable thermostat.

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