Correct Way to Install an Air Filter in a Furnace

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It is important to change out the air filter in your home at least every few months. This ensures you have the cleanest air possible filtering into your home. If you let the air filter sit for years on end you are not only sending dust into the air that builds up on the filter, but the furnace works harder because it needs to pump additional air through the blocked filter. Due to this you need to know how to install an air filter correctly to ensure proper air flow.

Things You'll Need

  • Air filter
  • Measuring tape
  • Obtain a correctly sized air filter for your home. If you use an air filter that is too small it leaves cracks for unfiltered air to enter your house, or if you use a filter that is too large you must squeeze it together when inserting it into the furnace, tearing the fibers of the filter when inserting it. Measure the filter opening to determine the correct size.

  • Remove the old furnace air filter and discard it.

  • Push the new air filter into the open space. Make sure to push the filter in completely to ensure no air flows around the filter.

  • Close the cover to the air filter and clean off the metal grating. This clears the dust away from the furnace and extends the lift of the air filter.

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References

  • Photo Credit Home sweet home image by civos from Fotolia.com
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