We help restaurants save energy by piping water through the grill hood filter and preheating water before returning to the water heater. Also this product can take the place of treated air make-up system. Immediate savings are realized after installation. Savings, grants and incentives can be calculated before product is installed. This is the ONLY company in Wisconsin that has this product. This product is currently being used in Chicago and there has been excellent results. My personal favorite is a TGI Fridays that went 3 weeks without using their water heater. Amazing product. Also excellent environmentally friendly cleaners available.