PadMatch / Every humidifier water panel and furnace filter size
- Nominal size
- 20 x 25 x 5 in
- Actual size
- 19.875 x 24.875 x 4.375 in
- Depth class
- 5 in (media cabinet)
- Order by
- nominal size (20 x 25 x 5 in)
- Typically installed on
- five-inch media cabinets, most commonly Lennox Healthy Climate (X6675) and compatible cabinets
The true measured dimensions of a 20 x 25 x 5 in filter and how to order it.
The nominal size 20 x 25 x 5 in is the name on the frame; the actual size is 19.875 x 24.875 x 4.375 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.
A five-inch nominal media filter that actually measures about 19.875 by 24.875 by 4.375 inches. The five-inch label describes a filter that is really four and three-eighths inches deep, which is why a true four-inch filter rattles in a five-inch cabinet.
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.
- 20 x 25 x 5 in furnace filteractual 19.875 x 24.875 x 4.375 in
- MERV 8 vs 11 vs 13which rating to buy
- 16 x 25 x 5 in actual sizeactual 15.75 x 24.75 x 4.375 in
Sources: Atomic Filters nominal vs actual air filter size chart ยท Lennox X6675 20x25x5 media filter actual size (Atomic Filters)