AprilAire 56 Automatic Humidistat

The AprilAire Model 56 Low Voltage 8-Wire Automatic Humidifier Control (Humidistat) works with your AprilAire Whole Home Humidifier to accurately maintain the relative humidity in your home. When using the included Outdoor Temperature Sensor with Automatic Mode, every 1 degree Fahrenheit change in outdoor temperature will prompt the Automatic Humidifier Control to adjust the indoor relative humidity (RH) by 1/2%. This Humidistat may also be used in Manual Mode if you prefer to adjust the humidity setting yourself. Compatible with AprilAire Whole House Humidifiers 110, 112, 445, 448, 760, 700 (almond-colored), and 768 in Power Mode; and Models 220, 224, 400, 440, 500, 550, 558, 560, 568, 600, 700 (gray-colored) in Bypass Mode. Also works with Model 800 Steam Humidifier in Power Mode. Features a Change Water Panel LED Indicator Light to remind you to regularly change the water panel in your AprilAire Humidifier. Change Water Panel setting can be adjusted if your heating season is less than 3-months or you have very hard water. The LED Indicator light also provides visual feedback of other conditions for testing or troubleshooting. This Humidifier Control must be mounted in the return air duct. For proper operation, the Humidifier Control must be at least 6 inches upstream of any of the following: Humidifier, Humidifier Bypass Ductwork (if applicable), and/or Fresh Air Intake Ductwork (if applicable). Includes a template for cutting the correct size duct opening of 3 inches H x 4.75 inches W. Model 56 also includes a gasket to help reduce air leakage between the duct and the control housing. Simplified wiring and troubleshooting using the humidistat access door - the humidity control knob and full cover do not need to be removed. AprilAire Whole Home Humidifier is sold separately.BUY WITH CONFIDENCE This genuine AprilAire humidistat was designed by AprilAire, the leader in indoor air quality solutions, to optimize the performance of your AprilAire Whole Home Humidifier in Automatic Mode, with the option of Manual Mode when neededAUTOMATICALLY ADJUSTS your home's relative humidity (RH) based on the outdoor temperature, when used in Automatic Mode, so there no need to manually adjust the control when outdoor temperature changesMAXIMIZE HEALTHY HUMIDITY in the 40-60% RH range which has been shown to reduce the incidence of respiratory infections and symptoms related to allergies and asthma by minimizing the formation of bacteria and viruses, fungi, and dust mites - feel more comfortable while also preserving items in your home susceptible to damage from changing humidity or dry conditionsSIMPLE OPERATION with few adjustments in Automatic Mode eliminates the need to turn the dial setting to OFF during the summer seasonCONVENIENT INDICATOR LIGHT alerts you when it's time to change the AprilAire Water Panel in your AprilAire Whole House Humidifier Shipping Note: Shipping to Alaska, Hawaii, PO Boxes, and APO addresses is not available for this item Warranty: 90 Day Woot Limited Warranty