How Often Should I Change My Air Filter?
Change standard 1-inch filters every 30-90 days. If you have pets, allergies, or live in a dusty area, change every 30 days. Thicker 4-5 inch filters can last 6-12 months.
| Item | Frequency | Signs It Needs Attention |
|---|---|---|
| Air Filter | Every 30–90 days (1-inch filters) | Visible dust buildup on the filter, Increased dust on furniture |
Why This Matters
A clogged air filter restricts airflow, making your HVAC system work harder and increasing energy bills by up to 15%. It also fails to trap allergens and pollutants, reducing indoor air quality.
5 Signs You Need to Replace Your Air Filter Now
- Visible dust buildup on the filter
- Increased dust on furniture
- Allergy symptoms worsening indoors
- Higher than normal energy bills
- HVAC system running longer than usual
Pro Tips
- 1Set a recurring reminder on your phone
- 2Buy filters in bulk to always have spares
- 3Write the installation date on the filter frame
- 4Consider upgrading to a higher MERV rating for better filtration
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Frequently Asked Questions
What MERV rating should I use?
MERV 8-11 is good for most homes. MERV 13+ is better for allergies but may restrict airflow in older systems.
Can a dirty air filter damage my HVAC?
Yes. Restricted airflow can cause the system to overheat, freeze up, or fail prematurely.
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