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How To Change a Furnace Filter


Your furnace filter removes small particles from the air flowing through a forced-air furnace and through your house. A dirty filter makes your furnace work harder to move that air. The additional strain drives up energy consumption and could lead to equipment failure. Changing a furnace filter is easy to do, and homeowners should plan on doing it two or three times during the heating season.

How to Find the Furnace Filter

A furnace filter fits into a compartment between a furnace’s incoming air and the combustion chamber. Labels on some furnaces indicate where the filter is located. In their absence, look for a panel covering a large slot or the blower motor. You might need a screwdriver to open this panel.

Determine Filter Size

Once you physically see your filter, you can simply lift or pull it out of the furnace. The old filter will have its dimensions printed on it. It’s important to buy new filters of the exact same dimensions. This is crucial because a filter that falls out or allows air through gaps around it defeats the purpose of having one. If your furnace is missing a filter entirely, then measure the height, width and depth of the compartment where it goes.

If you are uncertain what type of filter to buy or you have other concerns about furnace performance, the technicians at Aspinwall Plumbing & Heating Company in Quincy, MA, can assist you. You can also rely on us for a furnace tune-up.

Putting in the New Furnace Filter

Every furnace filter has arrows printed on it that indicate which way the air should flow through. Make sure that you insert the filter with the arrows pointing in the same direction that the air should flow. Put the cover panel back in place to complete the job.

Trust Us for All HVAC Needs

Aspinwall Plumbing & Heating provides professional HVAC services to residential and commercial customers. We fix, maintain, and install all types of heating and cooling equipment. Our services also include plumbing, ductless systems, and air purification. Contact us today for service from our family-owned company.

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