Patent ID: 8376243
Filing Date: 2013-02-19
Classification: F24H,F28D

Abstract:
1. A boiler for providing hot water to a heating system of a building and for simultaneously producing hot domestic water, said boiler comprising: a heating tank provided with a water inlet and a water outlet through which water for use in the heating system circulates; means for heating water within the heating tank; and a heat exchanger provided with a water inlet and a water outlet through which the domestic water circulates, said heat exchanger comprising a plurality of tubular coils of helicoidal shape that are located within the heating tank in order to allow heat transfer between hot water within the heating tank and the domestic water that circulates within the tubular coils, wherein said boiler also comprises an adjacent chamber annexed to a lower part of the heating tank, said adjacent chamber containing said means for heating water and being in direct fluid communication with the heating tank via an opening located between the adjacent chamber and the heating tank so as to take advantage of natural convection within said heating tank, wherein the adjacent chamber and the heating tank share a common wall, and wherein the opening located between the adjacent chamber and the heating tank is placed in the common wall.