Problem: For residential and commercial consumers seeking to reduce their energy consumption and carbon footprint and to promote a more sustainable future for their local communities and economies, variable frequency drives (VFDs) deliver significant efficiency improvements and a quick return on investment (ROI). Although adding a VFD to existing “fixed-capacity” or “fixed-speed” heating, ventilation, air conditioning and refrigeration (HVACR) equipment can drastically improve overall efficiency, a standalone VFD would have to be manually controlled or adjusted to achieve optimum efficiency improvements.