Patent ID: 8602316

Claim:
A method for providing heater water for use in industrial concrete production comprising the steps of: a) supplying incoming water at a first temperature: b) preheating the incoming water to a second, increased temperature; c) inputting the pre-heated water into an insulated tank having an internal heat exchange; d) heating the heat exchanger with a fossil fuel fired burner having a gas exhaust stack to heat the preheated water to the temperature required in the concrete production; e) coupling exhaust gases developed in said stack in the fossil fuel burning in preheating the incoming water to said second, increased temperature; and recirculating water out of said insulated tank to be preheated a second time if the water to temperature in said tank falls below that required in the concrete production, wherein said incoming water is supplied from a well or municipal water line, wherein said incoming water is suppiled at a temperature between 40° F. and 50° F. and wherein said fossil fuel fired burner heats said pre-heated water at said second increased temperature to a further temperature of between 140° F. and 180° F. and also including the step of regulating the flow of supplied incoming water to maintain a substantially constant temperature within said insulated tank.