PadMatch

PadMatch / Every humidifier water panel and furnace filter size

Part numberAprilAire 35
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Humidifier models
AprilAire 600 / 600M / 700 / 760
Correct pad
AprilAire 35
Pad dimensions
10 in W x 13 in H x 1.75 in D
Replacement interval
once per heating season

The correct replacement pad for the AprilAire 600 / 600M / 700 / 760, and the sizes that look right but are not.

The AprilAire 600 / 600M / 700 / 760 takes the AprilAire 35 pad. Buy that part; a different-size pad lets water bypass into the plenum.
Fits these humidifier models
Fitment notes

The 600, 600M, 700, 700M, 760 and 768 are the fan-powered and bypass units that all take the Aprilaire 35 water panel. Replacement is annual.

The most common Aprilaire panel. It carries a paint stripe on one short end that must point up toward the water tray, except in the 350 and 360 where orientation does not matter.

The pad to buy

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 600600M700760
Related

Sources: AprilAire Water Panel 35 product page