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Manuals, Tips, and Tutorials

Lennox Filters

Q. Where do I find my filter and change my filter in my Lennox furnace?

A. Locate your filter: Your air filter is located furnace in the blower compartment of your furnace, in an attached filter case, or in a wall-mounted return air grille. Air filters are typically located in your system’s return air vent, which might be on the ceiling, wall or on the side of your furnace or air handler. Your air filter might also be housed inside the unit. If this is the case, you may have to remove an access panel to get to the filter. If you cannot locate the air filter, call our office for assistance 360-895-2527

A. How to change your filter: The process for changing standard disposable filters is fairly straightforward and involves just a few steps: Remove the filter from its housing: Simply open the return and pop out the old filter. If there is no filter in the return, measure the length and width of the space, so you’ll know what size filter you’ll need for replacement. Note the size printed on the filter frame: If you removed an old filter, check its size so you can be sure you have the correct filter for replacement. If you have any questions about the size you need, you can refer to the owner’s manual for your furnace or air handler, or contact our office 360-895-2527

A. Install the new filter: Securely slide the new filter in place of the old one, making sure you follow the arrows printed on the sides of the filter frame. These arrows point to the direction of the airflow, which should be toward your furnace or air handler.

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