Mitsubishi Pac-us444cn-1

The Mitsubishi Thermostat Interface uses a patent pending algorithm to vary the INVERTER-driven compressor capacity and save energy. It can accomplish this by setting up and wiring a thermostat for a conventional system control with two stages of heating and cooling. Third party thermostats or input/output controllers can control the indoor units fan speed to three different levels: high, medium, and low.