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- DESIGNED TO FIT: Aprilaire humidifier models 400, 400A, 400M
- ACTUAL SIZE: 9-8/9 inches (height) x 12-8/9 inches (width) x 1-3/4 inches (depth)
- HIGH EFFICIENCY FILTRATION: Reduces pollutants from the water used in your humidifier to produce better air quality
- This product is not manufactured by or distributed by Research Products Corporation, owner of the registered trademarks APRILAIRE®/ or SPACE-GARD®
- 100% TIER1 NO WORRIES GUARANTEE – We stand behind the quality of filtration and overall performance of our Tier1 filters!
The #45 Aprilaire Humidifier Replacement Filter by Tier1 (3-Pack) is the heart of your humidifier, designed specifically to deliver the proper humidity to your home during the heating season. The Aprilaire water panel #45 fits the Aprilaire Humidifiers 400, 400A, and 400M. This product reduces pollutants from the water used by your humidifier, producing better indoor air quality. Replace annually for best results. Order today!