Whole-Home Media● In stock
20×25×3Air Filter
Actual size: 19.5″ × 24.5″ × 2.63″
Fits any 20x25x3 slot or return grille. Order by the size printed on your old filter.Also sold as 25x20x3.
Fits any 20x25x3 slot or return grille. Order by the size printed on your old filter.Also sold as 25x20x3.
Fits select Lennox and air-cleaner cabinets
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- Picked by HVAC techs
Choose your protection level
Pack size (bigger packs save more)
20x25x3 · MERV 11 · 2-Pack$63.98$58.99
Or subscribe: $25.99/filter delivered, never think about it againMERV 11 · 2-Pack
$58.99
Common questions about 20x25x3
What is the actual size of a 20x25x3 filter?+
The nominal size printed on the frame is 20x25x3, but the filter actually measures 19.5" × 24.5" × 2.63". That undercut is intentional, it slides into your filter track without binding. Order by the nominal size printed on your old filter.
Which MERV rating should I pick for a 20x25x3?+
MERV 8 handles everyday dust. MERV 11 is our most popular, it captures pet dander and pollen. MERV 13 adds smoke, bacteria, and virus-carrier capture. When in doubt, call us, a real HVAC tech answers.
How often should I change a 20x25x3 filter?+
Deep-pleat media filters like this 3-inch typically last 6-12 months. Check it at each season change.
Is a 25x20x3 the same as a 20x25x3?+
Yes, 20x25x3 and 25x20x3 are the same filter; the dimensions are just written in a different order. This filter fits both.
Nearby sizes
Top Seller1″ pleated
20×25×1
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MERV 8 · 11 · 13
$15.49single
$7.67/filter in 12-packs
2″ pleated
20×25×2
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MERV 8 · 11 · 13
$19.99single
$9.96/filter in 12-packs
Top Seller4″ media
20×25×4
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MERV 8 · 11 · 13 · 16
$32.99single
$28.00/filter in 4-packs
4.5″ media
20×25×4.5
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MERV 11 · 13 · 16
$41.99single
$35.75/filter in 4-packs