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Turbine ventilator functions to expel hot air in the house. As you know, cold air is below and hot air is above. If this hot air cannot get out of the house, then the house will be hot and feel hot even if you use a fan.
Before buying a turbine ventilator, make sure you know the size of your room. Then consult the nearest building shop.
Turbine ventilator installation is carried out by a special technician from the building shop where you purchased this item.