Free Filter Finder
No payment required. Get your filter size guidance and replacement schedule for free.
Free homeowner tool
Find the Right Air Filter in Under 60 Seconds
Answer a few quick questions and Filter Wizard will help you identify your filter size, choose the right MERV rating, and compare trusted buying options.
- 100% Free
- No Spam
- Buy Anywhere
Why homeowners trust Filter Wizard
A simple tool for one confusing home task
Compare Buying Options
See suggested buying paths from trusted retailers like Amazon, Home Depot, Lowe's, or other filter suppliers.
Save Your Result
Email yourself your filter size, MERV recommendation, and replacement schedule so you never have to remember it again.
Free Filter Finder
Not sure what air filter to buy?
Use the free Filter Finder to get your size guidance, MERV recommendation, replacement timing, and suggested buying options in under 60 seconds.
Free Filter Finder
Filter Wizard Finder
Step 1 of 4
Do you know your filter size?
Where is your filter located?
Most filters have the size printed on the cardboard edge. Look for numbers like 20x25x1.
What applies to your home?
This helps us suggest a replacement schedule that fits your home.
Ready to see your recommendation?
We will show your filter type, replacement schedule, and reminder months first. Email is optional after your report appears.
Building your filter recommendation...
Reviewing your size, home conditions, and filtration needs.
Verifying size information
Reviewing home conditions
Calculating replacement timing
Filter image coming soon
Representative image. Product packaging and appearance vary by retailer.
Recommended Product
Check before ordering
MERV 8 Pleated Filter
Best for: Standard homes • Normal dust
Estimated $8-$14 each
How to confirm your size
Check the dimensions printed on the cardboard edge. The format usually looks like 20x25x1.
We could not email your report, but your recommendation is shown above.
Ready to buy?
Compare current options for your recommended size and MERV rating. Confirm the size printed on your current filter before ordering.
Your recommended search Confirm size • MERV 8
Affiliate disclosure: We may earn a commission from qualifying purchases made through Amazon links, at no extra cost to you.
Filter Wizard provides general guidance. Confirm your exact size and HVAC manufacturer recommendations before ordering.
Your filter insight
Why we chose MERV 8
Good fit for standard homes with normal dust levels.
- Captures common household dust, pollen, and larger airborne particles.
- A practical default when pets, heavy dust, or allergy concerns are not major factors.
Compare with a basic fiberglass filter
Basic Fiberglass Filter
- Lowest upfront cost
- Limited particle capture
- Often replaced more frequently
Your Recommended Pleated Filter
- Better everyday particle capture
- More useful for pets, dust, or allergies
- Better fit for the answers you selected
Actual performance varies by product, HVAC system, and replacement timing.
How it works
Three simple steps
Find your filter
Answer a few quick questions about your filter size and home.
Get your recommendation
See your suggested MERV rating, replacement timing, and buying search.
Buy or save it
Compare retailer options or email yourself the result for later.
Why I built Filter Wizard
Air filters should not be this annoying.
Most homeowners forget their size, buy the wrong MERV rating, or wait too long to replace their filter.
Filter Wizard was built to make the process faster: find the right filter, compare buying options, and save the result for next time.
Latest Guides
Helpful air filter advice for homeowners
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Best Air Filter for Homes With Pets: What Should You Use?
Choose a practical filter for cats or dogs by comparing MERV, media type, airflow compatibility, and replacement timing.
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Why Does My Air Filter Move When the HVAC Turns On?
Learn why a filter may lift, shift, rattle, or drop—and what to check when repeated movement needs attention.
Read GuideAir Filter Buying Guide
Washable vs. Disposable Air Filters: Which Is Better?
Compare filtration, airflow, maintenance, cost, lifespan, MERV choices, and convenience before choosing a reusable or disposable filter.
Read GuideFree Tool
Never guess your air filter again.
Save your filter size, MERV recommendation, and replacement schedule so the next filter run is faster.
Your email is saved.
We will send helpful filter reminders and updates when available.