TUK is hot water boiler intended for solid and gas fuel combustion. It is made of high quality steel sheets and stainless pipes with welding technology. Boiler has good thermal insulation with mineral wool, thickness 50 mm, in order to reduce heat loss. Cleaning of the boiler is simple and easy, and boiler cleaning kit is delivered together with the boiler. Regulation of the operation is by boiler thermostats, which is the constituent part of a boiler.