Electric Fan Cfm Calculator

As a general rule of thumb follow these minimum cubic feet per minute cfm ratings when using an electric fan as the primary cooling source on a basic engine.

Electric fan cfm calculator.

1 electric heat temperature rise method. Existing static pressure in. Cfm or its elaboration cubic feet per minute is referred to as the amount of air that can be moved per cubic feet in a minute. Enter any two parameters to get the third.

Run the fan for 15 to 20 minutes after showering or bathing to expel all the excess moisture. Fan cfm calculator this fan calculator is typically used to calculate the cfm or cubic feet per minute of air exchange that may be desired in a building. Centrifugal blower fan squirrel cage blower. Cfm btu s δt x 1 08 input.

The calculator is a versatile energy management tool which accepts measured current full load amps or rated horsepower inputs. When a fan is set to its maximum speed the cfm is calculated by utilizing both the volume of air and the rate at which the fan blades move. Basic fan laws existing flowrate cfm. Follow this general guideline.

Cfm volts x amps x 3 412 δt x 1 08 δt f volts amps. Rise f δt volts amps. 1 250 cfm for a 4 cylinder 2 000 cfm for a 6 cylinder. This would be 3 1416 x 0 25 square feet x 800 feet 628 32 cubic feet per minute at 1200 rpm.

Bathroom vent fan cfm cubic feet per minute calculator. When installing a vent fan make sure there s at least a 1 2 gap under the bathroom door to allow fresh air to enter the room when the fan is running. Calculate the cfm volumetric flow of air at 1 200 rpm. 1 250 cfm for a 4 cylinder 2 000 cfm for a 6 cylinder 2 500 cfm for a 8 cylinder.

Whether exhausting air or bringing fresh air into a structure the calculation produced should help to figure out the size of fan s required to accomplish the air exchanges needed. A further note is that engines that are 5 0 liter 302 cubic inches or larger should use an electric fan with 2 800 or more cfm. Cfm stands for cubic feet per minute so an electrical fan with a 1 500 cfm rating will push 1 500 cubic feet of air per minute. The volume of the column of air described in step 2 is pi 3 1416 x fan radius squared 0 5 feet squared times the column length in feet.