Single unit air-water heating appliance

Claim 1

A hydro-furnace for heating potable water directly and air indirectly and maintaining continuous independent control over both, comprising: a housing having a return register, a supply register, and a plenum therebetween; a water heating container disposed within said housing having a water storage tank, a cold water inlet, a hot water outlet, a flue extending through said housing, and a burner disposed beneath said tank for heating said potable water; blower means disposed in said plenum for drawing ambient air through said return register and blowing said air through said plenum and toward said supply register; control means associated with said blower and said burner for switching said blower and said burner on and off, said control means comprising a first thermostat responsive to room temperatures and coupled to said blower, and a second thermostat responsive to the temperatures in said tank and coupled to said burner, said thermostats functioning electrically independently of one another; and heat exchanging means associated with said water storage tank and extending into said plenum for transferring heat from said hot water to said air in said plenum.