AprilAire H635EZ1 Humidifier Filter/Water Panel Assembly Replacement Kit for AprilAire Whole-House Humidifier Models: 600, 600A, and 600M

This water panel filter fit my AprilAire humidifier perfectly and was easy to install. It feels like a quality replacement and helps keep the unit running smoothly. Good value and I’d purchase again.

have used the AprilAire 35 Water Panel Humidifier Filter Replacement for years in my Model 600 whole-house humidifier, and I genuinely couldn't be happier with the product. When the air gets dry during the Pacific Northwest winters, these panels are crucial for maintaining comfortable humidity levels and a healthy home environment. Perfect, Hassle-Free Fit: The replacement panel fits into my AprilAire unit perfectly. It slides right into the frame without any bending, forcing, or modification required. The design ensures maximum water absorption and evaporation efficiency, which is exactly what I need from a quality filter replacement. Superior Performance: This panel is incredibly effective at its job. When installed, my humidifier efficiently keeps my home at the ideal humidity level (around 40-45%). The material holds up well throughout the season, distributing water evenly and consistently to combat dry air that causes static, dry skin, and sore throats. Durable & Reliable: Unlike some cheaper generic brands I tried in the past (which fell apart quickly), the genuine AprilAire panels are built to last the full recommended replacement cycle (typically once per heating season). The durable honeycomb design maintains its structure even with constant water exposure. Genuine Quality Matters: Using genuine AprilAire parts gives me peace of mind that my whole-house system is operating exactly as the manufacturer intended. The quality control is evident—I’ve never received a defective unit. Maintaining indoor air quality is important to me, and the AprilAire 35 Water Panel makes that maintenance easy and effective. Highly recommended for anyone with a compatible AprilAire system!

This fits more than AprilAire humidifiers. I've been using this water panel for several years on my Trane. They are all basically the same humidifier. If the measurements are good it'll work and they work well. They have a reasonable cost comparatively and come in a 2 pack.

Not too expensive and effective

Perfect fit and function.

This filter was easy to install and fit perfectly without any hassle. Once in place, it noticeably improved the performance of the humidifier, keeping the air more comfortable during dry weather. The build feels sturdy and well‑made, and it holds up well through the season without breaking down. It’s a straightforward replacement part that does exactly what it should, making maintenance simple and effective.

Perfect replacement. We still had our annual maintenance from a trained HVAC technician. The technician installed this filter for a fraction of the cost had we purchased the filter from the HVAC guy.

Excellent! Was the exact filter for my humidifier. It saved me a ton of money!

Love it works perfect with my humidifier

I’ve been using the Aprilaire 35 Water Panel Humidifier Filters for years now, and they’ve never let me down. These filters are an exact fit for my Aprilaire 600 model, and the installation process is straightforward, no tools required. The filters are well-made, and you can tell they’re built to last. One thing I’ve learned over the years is to replace them at the start of each winter season. If you live in a cold, dry climate like I do, this will make a noticeable difference in keeping your home comfortable. The air feels fresher, and it really helps with dry skin and static electricity. The 2 pack is a nice bonus because it saves me from running out mid-season, and it’s cost-effective. I also appreciate that these are genuine Aprilaire parts, made in the USA. My tip? Mark your calendar as a reminder to replace it every year. It’s one of those small maintenance tasks that can really pay off when it comes to indoor air quality.

The box comes with all the detail instructions needed to install. I felt very confident after reading and was able to perform on my own device. I ordered the 10 pack which gives the most value for my money. In addition, it gives me the peace of mind not having to buy more filters down the road. The filter feels good quality, and looks identical to the default one already installed for my home.

Perfect fit - works well

Genuine parts, Buy more save more