- Make sure this fits by entering your model number.
- DESIGNED TO FIT: Fits Aprilaire humidifiers requiring the #10 filter, models 110, 220, 500, 500A, 500M, 550, 550A, and 558
- ACTUAL SIZE: 9-1/2 inches (height) x 10 inches (width) x 1-1/2 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!
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