PadMatch / Every humidifier water panel and furnace filter size
Part numberAprilAire 45
ok- Humidifier models
- AprilAire 400 / 400M
- Correct pad
- AprilAire 45
- Pad dimensions
- 9.875 in W x 12.875 in H x 1.75 in D (nominal 10 x 13 x 2)
- Replacement interval
- once per heating season
The correct replacement pad for the AprilAire 400 / 400M, and the sizes that look right but are not.
The AprilAire 400 / 400M takes the AprilAire 45 pad. Buy that part; a different-size pad lets water bypass into the plenum.
Fits these humidifier models
- AprilAire 400
- 400M
Fitment notes
The 400 is the drainless evaporative unit and is the only Aprilaire that takes the paper-based 45 wick. None of the mesh panels fit it.
The 400-series is an evaporative bypass humidifier with no fan and no water waste, so its wick is a different, paper-based part from the 35 and installs in either orientation with no paint dot.
The pad to buy
Search Amazon for AprilAire 45 humidifier water panelaffiliate searchFind AprilAire 45 humidifier water panel on eBayaffiliate
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.
AprilAire 400400M
Related
- AprilAire Water Panel 45AprilAire 45
- AprilAire 45 equivalent and cross-referencescompatible and generic pads
- AprilAire 600 whole-house humidifierAprilAire 35
- AprilAire 500 whole-house humidifierAprilAire 10
- Honeywell HE360 whole-house humidifierHC26E1004