Solar Roof Ventilation Fan (VDO)

1) Install on the roof to insulate the heat at an attic

2) Ventilate high temperature, dust or odor

Can be installed at homes / offices / animal houses / shopping malls / factories / warehouses / chemical storage, etc.

This VDO:  is a test of a solar roof ventilation fan that helps cooling the temperature under the roof by 5-7 degree Celsius

More detail Solar Roof Ventilator

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