Belt Drive Whole House Fan. Open area of a belt drive whole house fans. That is because of its design elements. See chart below net free.
It is ul listed with thermal overload protection. Belt driven fans offer greater flexibility in terms of rpm speed.
It offers an efficient way to reduce cooling costs by pulling fresh air in from the outside expelling the warm air up into the attic and pushing it out through the attic exhaust vents.
Generally such fans are cheaper than direct drive fans of comparable size. An attic fan draws hot air out of the top of a home and vents it outside. With a belt drive the fan speed can be easily raised or lowered but there is belt and bearing maintenance to consider with a belt drive there are 2 additional bearings. This is one of the cheapest fans that you can find that still fits into the whole house fan category.
