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During cooling operation, the heat is transferred from the rooms via the pipe work designed also for cold water. There are two different principles of heat extraction.
Silent cooling works by absorbing heat from cooled floor, wall or ceiling surfaces. Pipes bearing cold water turn components into thermally effective heat exchangers and tanks (concrete core cooling). The refrigerant temperature must be maintained above the dew point to prevent the formation of condensate. The transferable cooling capacities depend largely on external influencing factors, e.g. the indoor air. When existing heating surfaces are utilized for cooling, the additional investment costs can be minimised.
Dynamic cooling, e.g. via fan convectors, works by actively transferring the cooling capacity of water-bearing pipe systems to the indoor air. As the cooling water temperatures can be below the dew point, the transfer of greater cooling capacities and simultaneous dehumidification of the indoor air can be achieved by producing condensate. Fan convectors are not only used solely to cool the air, they can also be used for combined heating and cooling.
Where to find fan convectors for heating and dynamic cooling with integrated thermostat!