Whole-Home Media● In stock
20×25×4.5Air Filter
Actual size: 19.5″ × 24.5″ × 4.13″
Fits any 20x25x4.5 slot or return grille. Order by the size printed on your old filter.Also sold as 25x20x4.5.
Fits any 20x25x4.5 slot or return grille. Order by the size printed on your old filter.Also sold as 25x20x4.5.
Fits Honeywell FC100A2028 class
- Free shipping $100+
- Fit guarantee
- Picked by HVAC techs
Choose your protection level
Pack size (bigger packs save more)
20x25x4.5 · MERV 11 · 2-Pack$83.98$77.49
Or subscribe: $25.99/filter delivered, never think about it againMERV 11 · 2-Pack
$77.49
Common questions about 20x25x4.5
What is the actual size of a 20x25x4.5 filter?+
The nominal size printed on the frame is 20x25x4.5, but the filter actually measures 19.5" × 24.5" × 4.13". 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 20x25x4.5?+
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 20x25x4.5 filter?+
Deep-pleat media filters like this 4.5-inch typically last 6-12 months. Check it at each season change.
Is a 25x20x4.5 the same as a 20x25x4.5?+
Yes, 20x25x4.5 and 25x20x4.5 are the same filter; the dimensions are just written in a different order. This filter fits both.
Nearby sizes
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