Aprilaire S86NMU Universal Multistage Thermostat. 2H/2C Conventional. 4H/2C Heat Pump.
Aprilaire S86NMU Universal Multistage Thermostat. 2H/2C Conventional. 4H/2C Heat Pump. Requires "C" wire. The AprilAire S86NMU Thermostat is easy to read, easy to set up, and easy to use. Features include a full-color graphical display, capacitive touch interface, and real language set up for easy installation and temperature control.