

Block-buildings’ natural ventilation control measures; ventilation occurring related restitution of departing heat to heat up central heating system including domestic hot water.
On top of the building’s ventilation chimney is built compulsion outflow, where each flue can be adjusted with the dampers, for example in accordance with the standards (eg, 20 l/s). This will help to solve or reduce problems in the functioning of natural ventilation: storeys (length of the flue), wind (strength, direction), temperature difference (internal and external), over- and under-ventilation, loss of heat.
On top of the building’s ventilation chimney are installed Heatcatchers which consist of ventilators, dampers and air-water heat-changers. Heat-launcher (eg. coolant, which is good thermal conductivity of the substance) circulating in heat-changers, provides a year-round input to the heat-pump (for example it can be installed into the heat-unit).
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