Industrial Engine Cooling System Preheater: This unit is a diesel fired boiler that gets plumbed into the coolant lines of a diesel engine. It was originally designed to be used on generator sets to keep the engine coolant warm in cold weather conditions for quick full electrical load startup. It can be used on many different diesel engine applications. Operates on 24 volts DC, 30,000 BTU/HR, includes the hardware shown in the photo. Manufactured by WECO Aerospace Systems, Inc. Model number: WE 3050-24, purchased new, never installed, $750., no haggle price. In Escondido, call (760)746-7209 (no emails or texts)