So I want to vent from a grow tent, is this the only vent I will need?...and do I need anything else to make it work, like am i supposed to attach this to something else, or does it work alone? sorry if thats a dumb question but i'm lost
http://www.htgsupply.com/viewproduct.asp?productID=46447
Depending on your budget and tent you will need:
*1 inline fan (Canfan, Eclipse, Elisent...) - I'd go with a 6" minimum for any of the the tents out there. the one you're linking to is really only there to help keep air movement up to speed. the CFM on these drop down to almost nothing if your trying to vent a tent. You can use them to support one of the inlne fans i listed. they are used as "booster" fans. basically if you have a long duct run between your fan and the intake/exhaust end, than you can place these at specific places to help keep the air flow consistent and allow the inline fan from overworking. The listed fans are built to work hard on their own, booster fans cost less but may require a more expensive model with a higher CFM than that is needed since the CFM will drop drastically for each of the following: start venting hoods, bends in the ducting, long ducting runs and a tent. and more.
fan controller that "IS" made for your fan. Always contact the manufacture or distributor, they can guide you to the right part to buy. Speedsters suck with the above fans. the only noise my grow makes is from the humming of the motor of my fan that is hooked up to a Speedster, yet the controller that i need runs around $200 to make it run quite.
*minimum 2 Flange Kits (total 4 flanges) - Even if the company that makes your tent doesn't offer them, there are other brands that supply them. You'll need to cut holes in the tent so plan everything ahead of time. If your tent doesn't fit anything over 4"/5" ducting, you'll need these. 2 flanges to bring in external air with ducting, 1 to hook to the ducting venting the hood to the outside of the tent, and 1 to connect the ducting to the opposite end of the flange your using to ventilate the hood.
min. 6" Vented hood (this will help keep your temps down
*Balast (400-600 depending on tent size). you could go with a 1000 if your tent is big enough and you have 2 different ventilation systems. 1 for the tent and one for the light. this would require 2 more flange kits if your tent doesn't support your duct size, and fan.
commercial carbon filter / DYI carbon filter