Attic Fan Blade Orientation

If a blade is angled down and the fan turns in the same direction as the blade angle it will blow forward.

Attic fan blade orientation.

These fans are usually wired to run in one direction. Air will blow in the other direction towards the back. 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. The leading edge of the blade will be covered with dirt.

Fan blade rotation is determined to be either clockwise or counterclockwise when viewed from the air discharged side. Some whole house fans however can be reversed to spin in the opposite direction. Likewise if the blade is angled down and the fan turns the opposite direction the reverse is true. The motor s nameplate depending on manufacturer may contain information on direction of blade rotation.

This is the best ceiling fan direction for air conditioning since it makes the air feel cooler than it is.