Place your fan engine side down on the floor/counter. Look at the blade that is in the 12 o'clock position. One side of the blade will be resting on the floor and one side will be raised.
• If the Right side is raised, then your fan is Clockwise.
• If the Left side is raised, then your fan is CounterClockwise.

Simply count the number of blades on your fan

Measure the opening of the center fan plate using a caliper.
If the fan pilot is lemon shaped (see bottom photo), your pilot will always measure 2.56". You will need to specify the lemon-shaped pilot when ordering.

Measure the overall diameter of your fan at its widest point.

Place your fan engine side down on the counter/floor. Put a tape measure through the pilot hole and measure the distance from the floor/counter up to the bottom of the fan plate in the center.