The Emerson closed loop digital controller, compatible with Copeland Scroll™ or Discus digital compressors, is a stand-alone thermostat and controller.
The Evolution® 987M is a fully modulating gas furnace with load matching performance that delivers up to 98.3 percent AFUE. A modulating gas valve is capable of adjusting from 40 to 100 percent of capacity, enabling lower speeds over longer periods of time for optimum energy efficiency.