Installing an air filter in a wall return involves a few simple steps:
- Open the grille: Locate the grille covering the air return vent on the wall. Open the clips or latches that hold it in place.
- Remove the old filter: Carefully remove the old air filter. Note the direction of the airflow arrow printed on the side of the filter. This indicates which way the filter was installed (the arrow should point towards the furnace/air handler).
- Install the new filter: Insert the new air filter into the return vent, ensuring the airflow arrow is pointing in the same direction as the old filter. The new filter might be a snug fit.
- Close the grille: Close the grille and secure it with the clips or latches.
