What filter/pad fits a Aprilaire 720 humidifier?
The Aprilaire 720 humidifier uses the L HydroCore replacement furnace/whole-house water panel.
Key takeaways
- Replacement part number: L HydroCore (Aprilaire).
- This is a furnace/whole-house water panel, not a portable-unit wick.
- Replace about every 12 months.
- A cheaper aftermarket filter can fit the same slot - check reviews for real-world fit before buying.
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Also known as
The L HydroCore replaces (and is cross-referenced under) these part numbers: HYDROL.
Filters for the rest of your home
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Frequently asked
What filter/pad fits a Aprilaire 720 humidifier?
The Aprilaire 720 uses the L HydroCore (AprilAire L HydroCore Water Panel Cartridge for 720 Humidifiers), a furnace/whole-house water panel.
Is the L HydroCore a wick or a furnace pad?
The L HydroCore is a furnace/whole-house humidifier water panel, not a portable-unit wick.
How often should I replace the L HydroCore?
About every 12 months under typical use, or sooner if it's coated in mineral scale or mold, or airflow through it drops.
Should I buy the OEM filter or an aftermarket one?
The genuine Aprilaire L HydroCore is the safe, exact-fit choice. A cheaper aftermarket wick or pad can fit the same slot too - check reviews for real-world fit and how well it wicks water before buying, since humidifier filters aren't independently certified the way NSF-listed water filters are.