We keep a wide assortment of different sized filters in stock!
We make it easy to get your replacement filters, just call 360-695-1476, contact us or visit us at 7609 MacArthur Blvd., Vancouver, WA 98664!
How Often Should You Change Your Air Filter?
The short answer: it depends. While your filter manufacturer provides a baseline, your home’s specific environment plays a huge role in your indoor air quality and HVAC efficiency.
As a rule of thumb, inspect your AC filter every 2–3 months. However, several factors could mean you need a replacement much sooner to prevent system strain.
4 Key Factors Influencing Your Filter Replacement Schedule
1. Filter Type and Size
Not all filters are created equal. A standard 1-inch pleated filter has less surface area and typically needs changing every 30–90 days. In contrast, a 4-inch high-efficiency media filter can often last 6 to 12 months before needing a swap.
2. Thermostat Habits & Usage
Your HVAC system acts like a giant vacuum. If you run your AC constantly during a heatwave or keep your furnace cranked in the winter, the filter is working overtime. The more air that circulates, the faster the filter clogs with dust and debris.
3. Pets and Allergies
If you have furry family members, you’ll need to change your filters more frequently. Pet dander and hair are leading causes of clogged HVAC systems. For households with multiple pets or residents with allergies, we recommend checking your filter every 30 days.
4. Home Age and Air Leaks
Older homes often have more “bypass air” from unsealed gaps, drawing in extra dust, pollen, and outdoor pollutants. Similarly, if your ductwork was poorly installed, your system may be pulling in dirty air from crawlspaces or attics, shortening your filter’s lifespan.
As filter inspections become a part of your routine, you might want to purchase replacement filters in advance and have a clean filter available in case an inspection indicates it’s time for a change.
Replacing a Furnace Filter – How to Change a Furnace Filter?
Replacing a furnace filter, in most cases, should be a relatively easy task for many homeowners. Before you get started, be sure to have a compatible replacement filter available. Here is a step-by-step description:
- Locate the filter. Your furnace filter is typically found in the blower compartment of the furnace or housed in the ductwork leading into the furnace.
- Turn off your system. You can either turn it off using the thermostat’s settings, or using the power cut-off switch typically located on the exterior of the furnace cabinet (it looks like a light switch).
- Remove the blower cabinet door or duct-mounted access panel to access the current filter.
- Before removing the filter, take note of the airflow direction arrows, typically printed on the side of the filter. Air should flow from the ductwork into the furnace.
- Carefully remove the filter – depending how long it’s been since last replacement it may have quite a bit of dust and dirt buildup.
- Install the new filter ensuring that the airflow arrows are pointing in the same direction as the filter you are replacing.
- Replace the blower cabinet cover or access panel.
- Restore power to the system.
Once your system is running, be sure it seems to be operating normally, and that it is heating or cooling your home as it should.
Pro Tip: Don’t Wait for a Breakdown
A clogged filter is the #1 cause of HVAC system failure. It restricts airflow, causes your coils to freeze, and spikes your energy bills.
Not sure which filter is right for your system? Contact the Blairco Experts today for a professional recommendation or to schedule your annual system tune-up!
What happens if I don’t change my air filter?
Neglecting your air filter can lead to restricted airflow, which forces your HVAC system to work harder. This results in higher energy bills, uneven heating or cooling, and eventually, costly repairs.