The motor s nameplate depending on manufacturer may contain information on direction of blade rotation.
Attic fan blade orientation.
This is the best ceiling fan direction for air conditioning since it makes the air feel cooler than it is.
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.
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.
If a blade is angled down and the fan turns in the same direction as the blade angle it will blow forward.
A ceiling fan should rotate counterclockwise in the summer so the blades push cooler air down in a column.
It allows you to turn your thermostat up a few degrees.
Some whole house fans however can be reversed to spin in the opposite direction.
Fan blade rotation is determined to be either clockwise or counterclockwise when viewed from the air discharged side.
Air will blow in the other direction towards the back.