Water heater and method of operating

摘要

A water heater includes a storage tank for storing water, a combustion chamber, a burner positioned in the combustion chamber, and a heat exchanger positioned in the storage tank. The burner produces products of combustion. The heat exchanger receives the products of combustion from the combustion chamber and transfers heat from the products of combustion to the water stored in the storage tank. The heat exchanger includes an upper portion and a lower portion. The upper portion is positioned above the combustion chamber and the lower portion is positioned below the combustion chamber.

主权项

1. A water heater comprising
a storage tank for storing water; a combustion chamber; a burner positioned in the combustion chamber, the burner for producing products of combustion; and a heat exchanger positioned in the storage tank for receiving the products of combustion from the combustion chamber and for transferring heat from the products of combustion to the water stored in the storage tank, the heat exchanger including an upper portion and a lower portion, the upper portion positioned above the combustion chamber and the lower portion positioned below the combustion chamber; wherein the upper portion includes a plurality of upper coils having an upper coil diameter; and wherein the lower portion includes a plurality of lower coils having a lower coil diameter, the lower coil diameter different than the upper coil diameter.