How To: Replace An Air Filter In A Gas Furnace or Air Handler

1. Step 1: Locate your indoor furnace or air handler
   1. Usually found in the basement or in the attic
2. Step 2: Remove dirty filter
   1. Some are easy to see
   2. Some have protective covers
   3. Some are in the ceiling
   4. Tip: double check filter size
3. Step 3: Insert the clean filter

All done!