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Masonry Heaters and Hot Water

In our hot water and central heating systems a heat exchanger is built into masonry stove in between two layers of masonry. There is a good reason for it and it has several important implications for the efficiency of the system. As the heat exchangers are not in a direct contact with the flames or gases, the operating temperature is relatively low, generally below 110 C resulting in high life expectancy and little wear. The heat is spread out in between several heat exchangers (exchanger output is about 0,7 kw per sq. m.) in the stove so the output into the water is more continuous and last long after the fire is out. At the same time there is almost no danger of accidental overheating as the operating temperatures are significantly lower than in standard boiler stoves. 

The system works well with solar panels as well as heat stores but can be also connected directly to underfloor heating or radiators. Design of the heat exchangers and their position in the stove is highly customized so parts of the heater that do not need to be warm can absorb more heat into water than parts of the stove where higher surface temperatures are desirable. Copper pipes are braze welded together and then machine pressed into an alloy frame which is then built into the stove. The ratio between space heating and hot water can range between 50 and 70%. When space heating is not an objective at all, the firebrick core can be literally wrapped up in heat exchangers and insulated so 80-85% of heat output goes into hot water. For boiler inserts for domestic hot water See Also Here

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