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#4080 Aprilaire Scale Control Insert

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#4330 Aprilaire Scale Control Insert Fits Aprilaire models 440, 445, 445A, and 448. U-shaped component encases the water panel and directs any built-up mineral deposits back into the water panel. 1 scale control insert per package. Replace as needed. AirFilters.com This #4080 Aprilaire Scale Control Insert fits Aprilaire models 440, 445, 445A, and 448. This U-shaped component encases the water panel and directs any built-up mineral deposits back into the water panel. There is 1 scale control insert per package. Replace as needed. Purchase your today from AirFilters.com!