STALMARK EKO GORAL is the central heating boiler most often used in small single-family buildings, studios, commercial pavilions, utility rooms and garages. The fuel used in the combustion process is hard coal, assortment: peas I/II. The fuel should be dry, otherwise it drastically accelerates wear and tear of the boiler, resulting in is the corrosion of furnace plates, and external plates under a tenon.

This is caused by the release of combustion products such as water, nitrogen oxides and sulphur, which cause corrosion. steel elements of the boiler. The boiler contains a casing with a body placed in it, inside which there is an ash chamber , compartment situated above it and separated from it by a water grate. The ashtray chamber and the combustion are closed by a door.