UPC 686720000652

About the Aprilaire Humidifier Digital Humidistat Controller White The Aprilaire 65 Humidistat is an automatic digital control that works like the Aprilaire 58 but has an added feature that can turn your HVAC blower on when humidification is needed, even if there is no need for heat at the time. The Aprilaire 65 Humidistat eliminates the need for external blower activation relays. This feature allows the Aprilaire 65 Humidistat to work great with energy efficient systems that feature shorter run cycles that provide lowertemperature air. The Aprilaire 65 Humidistat detects the indoor RH Relative Humidity) levelas well as the outdoor temperature and will automatically adjust the time of operation for the humidifier to provide the greatest level of humidity level within your home. The digital display of the Aprilaire 65 Humidistat displays the RH level inside the cold air return. The Aprilaire 65 Humidistat can also be operated in manual mode for applications where it is not possible to run a wire to an outdoor sensor that mounts on the return ductwork. The lighted display of the Aprilaire 65 Humidistat provides readings of indoor relative humidity readout, water panel change light, service indicator light, and an "on" indicator light. An optional remote sensor can also be purchased separately. Please Note: The Aprilaire 65 Humidistat must be continuously powered to function properly, and in some cases a separate 24 volt transformer may be required.