PadMatch / Every humidifier water panel and furnace filter size
- OEM part
- AprilAire 45
- Fit group
- single-part (no cross-brand equivalent)
- Cross-references to
- none
- Dimensions to match
- 9.875 in W x 12.875 in H x 1.75 in D (nominal 10 x 13 x 2)
- Fits humidifiers
- AprilAire 400, 400A, 400M
Cross-brand equivalents for the AprilAire 45 and the exact part to buy.
| Part number | Type | Fit group | Frame size to match |
|---|---|---|---|
| AprilAire 45 | OEM | single-part (no cross-brand equivalent) | 9.875 in W x 12.875 in H x 1.75 in D (nominal 10 x 13 x 2) |
| none | Cross-ref | single-part (no cross-brand equivalent) | 9.875 in W x 12.875 in H x 1.75 in D (nominal 10 x 13 x 2) |
- AprilAire 400
- 400A
- 400M
The AprilAire 45 fits AprilAire 400, 400A, 400M. 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.
Because nothing cross-references to this part, be wary of a generic listing that claims to fit unrelated humidifier models. Confirm your humidifier model is on this part's own fit list.
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 Water Panel 45AprilAire 45
- Fits the AprilAire 400 whole-house humidifierAprilAire 400 / 400M
Sources: AprilAire Water Panel 45 product page ยท AprilAire Water Panel Guide