Some whole house fans however can be reversed to spin in the opposite direction.
Attic fan blade orientation.
Whole house fans are used to blow hot air out of the attic by sucking cool air through the house up though the whole house fan and out though the gable vents in the attic.
These fans are usually wired to run in one direction.
Air will blow in the other direction towards the back.
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.
This is the best ceiling fan direction for air conditioning since it makes the air feel cooler than it is.
The motor s nameplate depending on manufacturer may contain information on direction of blade rotation.
Likewise if the blade is angled down and the fan turns the opposite direction the reverse is true.
The leading edge of the blade will be covered with dirt.
If a blade is angled down and the fan turns in the same direction as the blade angle it will blow forward.