FiltersDex

45 - Aprilaire Humidifier Filter

The 45 is a Aprilaire humidifier furnace/whole-house water panel that fits 7 models in our data.

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Furnace water panel

Buy the water panel for the 45

Aprilaire 45The exact water panel.Shop 45 Cheaper water panel that fitsAftermarket water panels fit the same slot for less - check reviews for real-world fit before you buy.Shop compatible water panels

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Also known as / cross-references

The 45 replaces these part numbers: P110-4545, S1-HUPAD45.

Humidifiers that use the 45 (7)

Aprilaire 400Aprilaire 400aAprilaire 400mBryant humbbwbp2417Carrier humccwbp2417Luxaire s1-bp4000mtYork s1-bp4000my

Frequently asked

What is the 45?

The 45 is a Aprilaire humidifier furnace/whole-house water panel that fits 7 models in our data.

Is the 45 a wick or a furnace pad?

The 45 is a furnace/whole-house water panel, not a portable-unit wick.

How often should I replace the 45?

We don't have a manufacturer-listed replacement interval for this filter - a common default is once per humidifying season.

Is a cheaper compatible filter as good as the OEM one?

A compatible wick or pad that physically fits isn't automatically equivalent - check reviews for real-world fit and how well it wicks water, since humidifier filters aren't independently certified the way NSF-listed water filters are.