Patent ID: 6776153
Filing Date: 2004-08-17
Classification: F24H

Abstract:
A hybrid atmospheric water heater comprising:an outer shell for a water heater, a direct contact water to exhaust gas portion provided within the outer shell, an indirect contact water to exhaust gas portion provided within the outer shell, a large diameter combustion chamber provided within the outer shell, the direct contact portion located at the top of the outer shell, the combustion chamber located at the bottom of the outer shell, the indirect contact portion located between the direct contact portion and the combustion chamber, exhaust tubes extending through a water compartment of the indirect contact portion, a plate separating the water compartment and the combustion chamber, a lower end of each exhaust tube extending through the plate so that hot exhaust gases pass from the combustion chamber through the exhaust tubes, said lower end of each exhaust tube extending under a water level of water contained within the water compartment, an upper end of each exhaust tube being open to allow the hot exhaust gases to exit the tube, water cascading over the outside of the tubes into the water compartment, the upper ends of each tube extending into an exhaust collection can, and said exhaust collection can having an opening bottom through which the hot exhaust gases exit the can and travel upward into the direct contact portion.