Abstract: Heating installation for generating heat in a heat diffusion system (1) and for producing sanitary hot water stored in a tank (3), comprising at least one heat source (4) and at least one means for storing heat (5), comprising in addition a loop-shaped or ring pipe (8, 9), with this pipe comprising a first portion (8a) across the ends of which a pipe (10) associated thermally with the heat source (4) can be connected in parallel, a second portion (9a) across the ends of which a pipe (11) associated thermally with the heat storage means (5) can be connected in parallel and a third portion (8b) forming, with a sanitary water circulation pipe (12) external to the tank (3), a heat exchanger, with the heat diffusion system (1) being connected in parallel across this third portion (8b) forming the heat exchanger and with a heat pump (15) being installed between the said ring and the sanitary water of the tank ( 3).