Fan Requirements Calculator

Select Structure Type

To estimate the cubic feet of building. Enter all dimensions in feet.

Length (L): Width (W): Height of sidewall (H):Height from top of endwall to peak (P):

To estimate the cubic feet of building. Enter all dimensions in feet.

Length (L): Width (W): Height (H):

To estimate the cubic feet of building. Enter all dimensions in feet.

Length (L): Width (W): Height of sidewall (H):Height from top of endwall to top of Dome (D):

To estimate the cubic feet of building. Enter all dimensions in feet.

Length (L):Width (W): Height from floor to top of endwall (H):Height of peak from top of endwall (P):

To estimate the cubic feet of building. Enter all dimensions in feet.

Length: Width: Height of Peak:

Total Cubic Feet in Building: Automatically calculate volume from building dimensionsInvalid Input

Time for Total Air Exchange (Minutes):Invalid Input

A recommended 1 full air exchange per minute will create an inside temperature 8-10 degrees Fahrenheit warmer than the outside temperature. Click here for more information.

Select Static Pressure:

Static pressure is created by limiting air intake. If the correct amount of free air is available the static pressure is 0, resulting in more efficient airflow. Click here for more information.

Calculate!

Calculation Results For Exhaust

(CFM for 12"/16"/20"/24" DC is stated at 24 volts. CFM for 28"/50" DC is stated at 30 volts. Results may vary.)

Ventilation Requirement (Cubic Feet):

Static Pressure:

Time for Total Air Exchange (minutes):

Number of Fans by size:		CFM Per Fan	Total CFM	Total Watts Needed
12" DC Snap-Fan 12" AC Snap-Fan	- -	- -	- -	- -
16" DC Snap-Fan 16" AC Snap-Fan	- -	- -	- -	- -
20" DC Snap-Fan 20" AC Snap-Fan	- -	- -	- -	- -
20" AC HLE Snap-Fan	-	-	-	-
24" DC Snap-Fan 24" AC Snap-Fan	- -	- -	- -	- -
28" DC Snap-Fan 28" AC Snap-Fan	- -	- -	- -	- -
50" DC Snap-Fan	-	-		-