Your furnace filter plays a big role in keeping your HVAC system running efficiently—and keeping your indoor air clean. Yet it’s one of the most neglected parts of the home. Changing your filter regularly can extend your system’s life, reduce your energy bills, and improve air quality.
In this guide, we’ll show you exactly how to change your furnace filter, how often to do it, and what kind of filter you need for your home.
Why Furnace Filters Matter
- Protect Your Equipment: Filters trap dust and debris that would otherwise clog the blower and heat exchanger.
- Improve Air Quality: Especially important if you have allergies, pets, or asthma.
- Lower Energy Costs: A clean filter allows air to flow freely, which means your system doesn’t have to work as hard.
How Often Should You Change Your Filter?
It depends on several factors:
- Every 1 to 3 months is standard.
- Change monthly if you have pets, allergies, or a high-traffic household.
- If you notice dust buildup, weak airflow, or higher energy bills, it’s probably time.
How to Change Your Furnace Filter
Step 1: Turn Off the System
- Set your thermostat to “Off” or turn off power at the breaker to stay safe.
Step 2: Locate the Filter
- Common locations: return air duct, blower compartment, or inside the furnace cabinet.
Step 3: Check the Filter Size
- The size is usually printed on the edge of the filter (e.g., 16x25x1).
- Make sure you get the correct size replacement.
Step 4: Remove the Old Filter
- Slide it out carefully to avoid shaking loose dust.
Step 5: Insert the New Filter
- Make sure the arrows on the frame point toward the furnace/blower.
Step 6: Turn the System Back On
- Restore power and enjoy better airflow and cleaner air.
Choosing the Right Filter
- Fiberglass Filters: Inexpensive, but capture fewer particles. Good for basic protection.
- Pleated Filters: Better filtration and airflow balance. A solid choice for most homes.
- HEPA Filters: Highest filtration, but may require a system upgrade to handle the resistance.
Set a Reminder
Set a calendar reminder or use a smart thermostat to notify you when it’s time to change the filter.
Need Help or Maintenance? Affordable Comfort offers furnace tune-ups that include filter checks, safety inspections, and performance testing. Let us keep your system running its best.
