25×25×1Air Filter
Fits any 25x25x1 slot or return grille. Order by the size printed on your old filter.
- Case of 12
- Shipping included
- Picked by HVAC techs
MERV 11 in this size: call (270) 534-5492 for a price.
About $8.50 a filter. Kentucky orders add 6% sales tax.
Want a new case every year? A yearly subscription is available at checkout.
Common questions about 25x25x1
What is the actual size of a 25x25x1 filter?+
The nominal size printed on the frame is 25x25x1, but the filter actually measures 24.5" × 24.5" × 0.75". 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 25x25x1?+
MERV 8 handles everyday dust. MERV 11 is our most popular. It captures pet dander and pollen. MERV 13 adds smoke and the finest everyday particles, and it's fine in modern systems (post-1995 blowers). When in doubt, call us. A real HVAC tech answers. Compare MERV 8, 11 and 13.
How often should I change a 25x25x1 filter?+
Every 30 to 90 days: monthly with multiple pets or allergies, every 60 days with one pet, every 90 days otherwise. A case of 12 covers a year of monthly changes, longer if you change less often. See the schedule by household type.