How to Clean a Reusable Furnace Filter

Furnace filters remove dust and other particles from the air as it is moved through the furnace during the heating process. Clean filters allow the free movement of air, improving not only the air quality in the home but the efficiency of its furnace. Although most furnaces use a disposable filter, some use a reusable foam filter. Cleaning reusable furnace filters is a simple home maintenance task and helps to keep your furnace running efficiently.

Things You'll Need

• Screwdriver
• Sink or tub

Instructions

1. Turn off the furnace. Locate the switch on the furnace or turn the thermostat down to a point that the furnace will not run.

2. Remove the access cover of the furnace. This may require a screwdriver. Consult the owner's manual for instructions specific to your furnace for removing the access panel.

3. Locate the filter. Commonly located near the blower, the reusable furnace filter has a foam or sponge texture. Slide the filter from the furnace.

4. Spray the filter with water. Place the filter in a bathtub or large sink or take it outside. Spay water from both sides until the dust caked on the filter is removed. Squeeze the filter to remove the excess water.

5. Allow the filter to dry before returning it to the furnace. Close the furnace access panel before operating the furnace.

Tips & Warnings

• Inspect the filter at least once a month during the winter heating season. Clean the filter if it is difficult to see through the gaps in the filter.

References

• Planet Green: Cleaning Furnace Filters
• The Furnace Filter: All About Furnace Filters