The Aprilaire fan pack is designed for use with the Aprilaire 800 Steam Humidifier. Simply recess it into a wall and connect it to the 800 humidifier. For homes without ductwork, this is the perfect solution to humidification throughout your entire home. With the 850's quiet operation, you won't even notice it!
Aprilaire Model 850 Fan Pack. The humidifier generates steam by energizing two electrodes that extend into a canister of water. Current flowing between.