Abstract: The invention is a gas fired water booster comprising a holding tank, a centrifugal pump, an infrared burner enclosed by a woven ceramic fiber sleeve, a primary and a secondary heat exchanger, and a gas/air supply source. Preferably, the tank and the burner are generally annular in shape and the burner is disposed substantially within the tank. An air/gas mixture is supplied to the burner by a blower and is ignited creating a combustion surface approximately one eighth of an inch above the surface of the woven ceramic fiber sleeve. Water is continuously circulated through the heat exchange system and the burner remains on until a temperature sensor indicates that the water has attained a temperature in the desired sanitizing range.

Abstract: The invention is a warewasher comprising a wash chamber, a tank at the bottom of the wash chamber, a heat exchange tube entering the tank through a first port in the tank, traversing the base of the tank, and exiting the tank through a second port. The tube is at a height such that it is submerged when the tank is filled with water. The tube has first and second ends outside the tank, and a gas-fired infrared burner located in the tube adjacent the first end to which a combustible fuel is supplied and combusted by the burner. The combustion products of the fuel are received in the tube and are vented at the second end. By combusting fuel and passing the combustion products through the tube, water in the tank is heated.