Aprilaire 4655 Manual Humidistat Humidifier

About The Aprilaire 4655 Manual Digital Control Humidistat Aprilaire has been providing top of the line humidifiers and humidistats for over 60 years now. The Aprilaire 4655 Manual Digital Control Humidistat is designed to be used with low voltage service to offer control of your humidification equipment, and is made to be used with the Aprilaire humidifier model 500. The indoor humidity should be set to match the outdoor temperature to prevent water from running down the sides of your windows. Typically cold air will condense against the window, but with the Aprilaire 4655 Manual Digital Control Humidistat this will not happen. When there is an increase in relative humidity the nylon ribbon in the Aprilaire 4655 Manual Digital Control Humidistat will expand which in turn opens the control switch that will stop the operation of your humidifier. When the relative humidity reverses the Aprilaire 4655 Manual Digital Control Humidistat will close the control switch. The Aprilaire 4655 Manual Digital Control Humidistat can either be wall-mounted or mounted on the return plenum. The Aprilaire 4655 Manual Digital Control Humidistat includes a plenum cutout template that measures 4 5/32″ x 2 7/16″. For duct mounting the Aprilaire 4655 Manual Digital Control Humidistat should be placed at least six inches upstream from the humidifier, humidifier bypass ductwork or fresh air intake ductwork.

Order Processing: After your payment is authorized and verified, we will start processing your order and this process can take from 1 to 2 business days, so please be patient with us. If we are unable to process your order due to inaccurate or incomplete payment or incorrect address information, your order processing may be delayed.

Carrier: UPS/FedEx/USPS. Delivery Timescale: More than 90% of orders arrive in 10 business days after despatch.

FREE RETURNS on all orders!
The following conditions must be met:

1. Items must be returned within 30 days after the purchase date.
2. Items must be unworn, undamaged and in original packaging.