20x25x5 air filters
Start with the three numbers printed on the frame, such as 20 × 25 × 5. We will show the different actual-size versions sold under that label.
Open the fit guide and current catalog Fit first. MERV second.
Find the right air filter before you buy
Start with a published size guide, then use the size printed on your old filter, its model number, or a replacement SKU. We separate the nominal size (the category name on the frame) from the actual size (the filter's published physical dimensions), so similar labels do not get treated as the same fit.
- Manufacturer sources shown
- No paid product ranking
- Retailer links go to the exact SKU, MERV, and pack option
Available size guide
Start with the size we have fully verified
Only published guides appear here; unverified and placeholder sizes stay out of the catalog.
First verified size guide
20x25x5 does not always mean one physical size
Manufacturer listings show multiple actual dimensions under the same 20x25x5 label. Compare those versions side by side, then continue to the matching filter options.
A short, useful path
Fit, filtration, then retailer
- Confirm fit. Match the model or all three actual dimensions in the same order.
- Choose filtration. Compare MERV only among candidates that can physically fit.
- Check retailer options. Open the relevant option to see the retailer's current price and availability.
Evidence you can inspect
Every fit claim should have a reason
“Verified for your system” is reserved for documented manufacturer relationships. An exact actual-dimension match is shown separately, and a shared nominal label stays a starting point—not a promise. This keeps the recommendation useful without burying you in engineering language.
Read our fit methodology