PadMatch / Every humidifier water panel and furnace filter size
- Nominal size
- 14 x 25 x 1 in
- Actual size
- 13.5 x 24.5 x 0.75 in
- Depth class
- 1 in (flat panel)
- Order by
- nominal size (14 x 25 x 1 in)
- Typically installed on
- narrow return-air grilles and slim blower compartments
The true measured dimensions of a 14 x 25 x 1 in filter and how to order it.
The nominal size 14 x 25 x 1 in is the name on the frame; the actual size is 13.5 x 24.5 x 0.75 in. On a flat filter each face runs about half an inch under nominal and a one-inch filter is really three quarters of an inch thick.
The narrow flat size, actual 13.5 by 24.5 by 0.75 inches. It shares the 24.5-inch height of a 16 by 25 but is two inches narrower, so a 16 by 25 will not seat in a 14 by 25 slot.
Find your model
Read the number stamped on the humidifier cabinet or printed on the old pad, then match it below. Confirm the frame size before buying a generic.
- 14 x 25 x 1 in furnace filteractual 13.5 x 24.5 x 0.75 in
- MERV 8 vs 11 vs 13which rating to buy
- 16 x 25 x 1 in actual sizeactual 15.5 x 24.5 x 0.75 in
- 20 x 25 x 1 in actual sizeactual 19.5 x 24.5 x 0.75 in
- 16 x 20 x 1 in actual sizeactual 15.5 x 19.5 x 0.75 in
Sources: Atomic Filters nominal vs actual air filter size chart ยท Filterbuy air filter sizes chart