thanks for the speedy reply.

Yes adding another 600 watt.

I use a speed controller for each fan, currently both are set on max. I figured since I'm not using co2 this grow that definetly plumbing in with the charcoal filter is my backup if temps too high. Just getting idea in prep for co2 where only the light fan would be on.

Negitive pressure makes sense on the hoods, didnt think of that, sticking with pull then. Temp during light hours averages between 74-81 (have ac for the warmer outside temps to come) I checked for leaks all over previously and also i duct tapped the duct connections to my fans because I could never get the duct clamp tight enough without ripping the duct lol, hoods definetly sealed.

going to put some pics up, let me know if ducting is sufficent or ideas on how to make it so, thanks again for the fast response.


nm on the pics lol, apparently dont have enough post to post any, imagine i can bump a few threads for post counts? lol.
Havien Reviewed by Havien on . fan/hood ventilation question This is for a 56" x 56" x 79" tent/cab. I currently cool 2 600 watt easycool 6" hoods in my flower tent with 1 fan 6" inline fan 400ish cfm (growbright highflow), It goes intake from outside tent > light > light > Fan > exhaust. I have a seperate 6" fan attached to a carbon filter that keeps negitive pressure on the tent, filter > fan > exhuast. My question is, if I could add a third hood/light (intake/light/light/light/fan/exhuast) or if I need a bigger fan and if so what size. Rating: 5