VRF is mentioned in every technical magazine, by utility programs as it is the new cooling system technology everyone is talking about and promoting implementation as VRF systems have very high SEER ratings. These systems have proven that through complex control strategies and hardware users can realize up to 50% reduction in energy use. Now consider the many millions of existing HVAC and refrigeration systems with compressors operating at fixed speeds regardless of the load where it is not cost effective to replace with new VRF systems. What if using simple temperature sensing technology, contractors can install a controller and mated VFD that can safely regulate speed to closely match the actual cooling load. This new controller can regulate both existing scroll and reciprocal compressors in either HVAC or refrigeration applications resulting in huge efficiency gains. All this at a fraction of the cost of new VRF systems and the complexity of maintenance that comes with VRF. With LED technology being so prominent and reaching near saturation in some markets, we feel it is time to focus on mechanical solutions that are easy to implement and produce proven energy savings. Having installed web-based refrigeration controls in many thousands of systems, we have documented operation characteristics to identify what systems would yield the best ROI by implementing compressor speed controls.