Aprilaire - 10 A2 10 Replacement Water Panel for Whole House Humidifier Models 110, 220, 500, 500A, 500M, 550, 550A, 558 (Pack of 2) Aluminum

Great price. OEM filter fits perfect.

These are great, name-brand filters for a good price

It's the best deal that I could find for this filters. I've been using these for 2 years in my whole house humidifier and they've been great. We have really hard water so we need to soak them in vinegar every now and then and they come out like new. They are very easy to install, open the humidifier, slide the old one out, insert the new one and close the humidifier. I replace it in fall and use the humidifier until early spring. At the half way point I soak it in vinegar. The 4 pack makes it convenient to not have to remember to order new ones come Fall and you can't go wrong with OEM.

⭐️⭐️⭐️⭐️⭐️ I recently installed the Genuine Aprilaire humidifier Water Panel #10 (Pack of 2) in my whole-house humidifier, and they’ve performed exactly as expected. These water panels are the key component in maintaining proper humidity levels in the home, helping the humidifier convert water into vapor efficiently as warm air passes through the panel. Installation was quick and easy — they fit my AprilAire 500 series unit perfectly with no forcing or trimming. Once in place, I noticed the system running smoothly and the house staying at a more comfortable humidity level throughout the day. The panels feel well-constructed, and the absorbent material does its job without wicking issues. Having two panels in the pack is great value because it covers at least two seasons of use without needing to reorder. Just remember to replace them annually or when you start seeing mineral buildup from hard water. Overall, a dependable, genuine replacement that keeps my humidifier working the way it should — strong recommendation and I’d buy again! 💨🏠

It fits like a glove. Perfect fit for my air circulation filter.