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The meaning for ventilation is to bring fresh air in and to clear out the pollutants produced inside the building.

Fresh Air Window ventilators, ThermoVent and ThermoPlus take fresh air into the room through one single air channel in upper part of the window frame either straight through (summer time) or by preheating it between outer and inner glasses (winter time) utilizing the thermal loss and solar energy of the window. Both have versions for renovation use when replacing typical slot ventilator to fresh air window easily.








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