Nowadys, the advanced technology of gas condensing boiler offers a standard utilization ratio of 109% which is a top value. But what makes a top model from a good boiler? It is the systems technology which is the common theme at BRÖTJE. Throughout the entire development and production. This applies not only for gas condensing boiler plus domestic hot water tank & flue gas system. It is every single component which contributes to progressive and efficient heat generation in your own home. Hence, systems technology means tailor-made efficiency.