Furnace Filter Direction: Which Way Should the Arrow Face?
Wichita, Andover, Augusta, Maize, and El Dorado homeowners — this quick guide shows how to find the right direction for your furnace air filter. Installing it backward restricts airflow and wastes energy. Fixy’s Fast. Fixy’s Friendly. means we keep your HVAC running right.
Why Furnace Filter Direction Matters
Air filters trap dust and debris before they reach your furnace or AC. If installed backward, they can’t do their job — and your system works harder to push air through. The U.S. Department of Energy says dirty or backwards filters can raise your bills by 5–15%!
How to Find the Filter Arrow Direction
The arrow on the filter always points **in the direction of the airflow** — that means **toward your furnace or air handler**. If you have an old filter still in place, match its arrow. No old filter? Look at the furnace manual, or follow this rule: air flows from your return duct **into** the furnace.
Tip: Use a marker to draw an arrow on the furnace housing so you never forget!
Different Filter Types & Lifespans
Not all filters are the same. Budget filters often last 30 days — great for basic dust control but not much else. Higher-end pleated filters last 3 months and catch smaller particles. Some brands claim longer life, but Wichita’s dusty winds mean check yours monthly.
Need filters fast? Local big box stores like Home Depot and Lowe’s stock many sizes.
Other Indoor Air & HVAC Tips
Clean filters are just the start. Boost your comfort and efficiency by checking your Spring HVAC Cleaning Guide. Upgrade drafty windows, seal leaky ductwork, and check your insulation for the best performance. See our HVAC services for help.
Fixy’s Tips
What happens if I put the filter in backwards?
Backwards filters reduce airflow and strain your blower motor, raising energy costs and shortening system life.
How often should I change my furnace filter?
Budget filters: every 30 days. Pleated 1–3 month filters: check monthly, replace at 3 months max. Homes with pets or allergies may need more frequent swaps.
Where can I buy furnace filters locally?
Most Wichita area homeowners shop at Home Depot, Lowe’s, or local hardware stores for common filter sizes.
Do all HVAC systems use the same filter?
No — always check your unit’s required size and MERV rating. Too thick a filter can also restrict airflow.
Need help with HVAC maintenance in Wichita, Andover, Augusta, Maize, or El Dorado? Contact us today or see our HVAC services to schedule expert help.
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