What's the difference between Vent Fan and Circulation Fan


Hello everyone, I’m a little not clear about the use of this two fan…

thx for your answering! :slight_smile:


The vent fan forces outside air into the grow chamber. The vent fan would typically be turned on and off based upon the consideration that when the vent fan is on then the outside air’s temperature, humidity, and co2 level will change the grow chamber’s values for these variables.

The circulation fan recirculates air within the grow chamber. The circulation fan would typically be set to run all the time in order to keep dead air pockets from accumulating near the plants.


Oh,got it, thank you so much!