The space-saving Kompaktkessel models B5 and B6 are water heaters with an integrated heat exchanger, a small combustion chamber and heating power of 6 kW. When compared with B6, the B5 is notably shorter, thus it’s a relatively higher. The constant hot water share for both models is around 46%.

The B4 water heater will provide up to 9 kW. B4 boilers have a modern cleaning system available as option – very easy to use, consisting of a set of cleaning springs with an actuating lever. Water boiler power is constant, that is 45- 55% of available combustion heat.