How many fans do I need?

The following answer is a generalization. Speak with a HydroMist representative to help find a solution for your needs.

If you are indoors or in a location that is blocked from the wind, use the CFM of the desired fan and the volume of the space to determine the amount of fans. (Keep in mind they need an air inlet and outlet for air flow.)

Use this formula:

Fans Needed=Volume/(Fan Volume x Transfer Time)

Calculate volume:

Example: Factory 50ft x 80ft x 15ft = 60,000 cubic feet

Choose a fan (See Chart Below):

Example: Choose 30” fan. CFM = 10000

Choose time to transfer the total volume of air for the space being cooled.

Example: Every 2 minutes (I recommend time between 1-3 minutes.)

Determine fans needed:

Example: 60000/(10000 x 2 mins) = 3 fans

Fan Chart

PN	Size	Description	CFM
F10-01-004	20"	20" Cage Fan, Single Speed	5500
F10-01-005	24"	24" Cage Fan, Single Speed	8000
F10-01-008	24"	Multi-Speed, Oscillating	6800/1100
F10-01-008	24"	Multi-Speed, Non-Oscillating	6800/1100

If you are in the open outdoors, the wind affects this calculation directly correlating with the transfer time. This makes it difficult to use this calculation.