Boiler

摘要

The boiler has a combustion chamber (2) surrounding a coiled slot heat exchanger (1). A cylindrical surface burner (3) for liquid or gaseous fuels is arranged at an end of the combustion chamber. A cylinder shaped sleeve (4) is arranged between the burner and the slot heat exchanger. The sleeve comprises a fluid impermeable surface, and is made of sheet metal. The sleeve comprises a cylindrical part elements (5) and spacer elements (6) that are arranged at circumference of the sleeve. The sleeve comprises openings at a front side.