I got one of these… is it too close to the tops?

[Jim Haddar]

Okay next question: if the exhaust vent in the tent is a fabric tube 8 inches diameter diameter, will a 4- or 6- inch fan function well enough? I

 

[Roger A. Shrubber]

Okay next question: if the exhaust vent in the tent is a fabric tube 8 inches diameter diameter, will a 4- or 6- inch fan function well enough? I

yeah, for the lights you have, a 4 inch fan should be enough, but they last a lot longer if you run them at about 75% power, so i would recommend a 6 inch. if they don't come with an adjustment knob, you can buy a router controller at most hardware outlets, harbor freight, home depot.com, that kind of place. you plug the fan in and can adjust the speed of it with the router controller

 

[Alfadog#1]

And if you go with 6inch a very good quality and sounds super silent because of the housing but its something that's gonna last for years and years is vortex s-600 inlinefan

 

[Lenin1917]

These are decent for the money, I be got one in both my veg tents iPower 4 Inch 195 CFM Duct Inline Ventilation Fan Air Circulation Vent HVAC Exhaust Blower for Grow Tent, Greenhouses, Basements or Kitchens, Lite, Black https://a.co/d/bdHi4Cd

 

[Roger A. Shrubber]

whatever fan you get, if the noise it produces is an issue, you can wrap an old blanket around it, old towels, it cuts down a lot on the noise. i also found that mounting them to a 2X4 and putting a piece of rubberized shelf liner under it cuts down a lot of it too.