Search AirCon is pleased to present Cold Plus, a proven technology that will substantially improve the efficiency of refrigeration and air conditioning. Cold Plus, a one-time treatment, will reduce energy use in the range of 10 – 26 percent, which typically results in an ROI of under 18 months. Cold Plus has been in development by the Willis brothers, Dale and Larrell, of Lakeland, Florida, for nine years. Prior to their introduction of Cold Plus, the Willis brothers were known worldwide for their developments in polymer science for many industrial uses.