10" can fan max fan for grow tent. Too much? overkill? will there be a tornado?

Not a chance. You can hardly create a tornado with any 110 V fan. It's hard to move too much air. Go big to grow big with lights, fans and containers.

Or you could drop like 20 bucks on a speed controller?

Thanks guys. Im just afraid that my tent is gonna be flapping around like crazy. I will set up and see how it goes. So do you think it will work if i use the fan for exhaust of the two hoods, and to exhaust the tent? I plan to use a y on the fan, one end will go through the hoods to the opposite of the tent and exit, the other side of the y will go down to a charcoal filter. Or should I put the y on the opposite side?

Originally Posted by Unlimited One

Thanks guys. Im just afraid that my tent is gonna be flapping around like crazy. I will set up and see how it goes. So do you think it will work if i use the fan for exhaust of the two hoods, and to exhaust the tent? I plan to use a y on the fan, one end will go through the hoods to the opposite of the tent and exit, the other side of the y will go down to a charcoal filter. Or should I put the y on the opposite side?

You are going to cool your hoods with this fan? Then air forced through the hoods will be more effective than air pulled through it. Additionally hot air forced through a fan tends to wear out bearings and such much faster. Now the air to filter the smell is off your canopy. That needs to be forced through a carbon filter capable of flowing enough CFM to keep from stifling its fan. You need more fans. And you can hardly have too many.