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Dusty house? Here's what to do first

Ten minutes, no tools, and the single highest-return maintenance task in a Texas home. Includes how to read the size and which direction the arrow goes.

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Safe to DIY

Most homeowners can handle this with basic tools by following the steps below.

Beginner About 10 min

Video: LRN2DIY (YouTube)

What to do, in order

  1. Step 1: Turn the system off at the thermostat.
  2. Step 2: Open the return grille or the filter slot at the air handler.
  3. Step 3: Read the size printed on the frame of the old filter before you throw it out.
  4. Step 4: Slide the new filter in with the airflow arrow pointing toward the furnace or air handler.
  5. Step 5: Close the grille, restart the system, and write the date on the filter edge.
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