During the summer an attic can be 40 to 50 hotter than the outside temperature which in turn heats up the house very quickly.
Attic fan direction.
The downside of attic ventilation fans.
Some whole house fans however can be reversed to spin in the opposite direction.
Quietcool attic fans work almost everywhere almost anytime.
The fan is warranted for five years draws a mere 3 2 amps and is capable of handling an attic area up to 1500 sq.
If the vent fan is only pulling out of the garage and not the attic space then it wouldnt help the attic much which is what you want to cool.
One static vent style is the turbine vent which uses wind to power its enclosed fan all it takes is a light breeze to rotate the blades and suck heat out of the attic view example on the home.
Good insulation reduces fan effectiveness.
With an attic fan you can cool the attic to the same temperature as it is outside greatly reducing the house from heating as quickly.
These fans are usually wired to run in one direction.
Most houses only have one gable fan at one end and a vent the same size as the fan at the other end and of course the soffit vents.
However the utility of attic ventilation fans is actually quite a controversial topic.