An improved water heater for supply systems

摘要

403,542. Hot-water systems. McLEAN, D., The Dawn, North Shields, Northumberland. March 4, 1933, No. 6610. [Class 64 (i).] A gas-fired waterheater I connected with a storage tank A as described, for example, in Specification 373,317 is also associated with an electric heater N. This enables the water to be warmed before lighting the gas, and thereby prevents the gas flames from impinging upon a cold surface.