http://boards.cannabis.com/indoor-gr...-progress.html

That goes through it pretty thoroughly...

Basically, best to always pull air through the fewest bends possible. I have mine like this: carbon filter at the top of my closet, tubing from the cf bends down and around to my cooltube (don't use duct tape around the cooltube because it can melt), tubing then from the cooltube goes out my closet and to my fan. I put some duct on the other end of the fan to dampen the noise a little.

There's a nice little formula in that thread concerning how many cfm's you need for your space and light.
bigtopsfinn Reviewed by bigtopsfinn on . About to purchase first lighting system HI All, Well im finally going to take the plunge and go for my first grow. Just wanted to check the lights I am going to buy from ebay with you more experienced growers out there. 400w HPS Dual Spectrum Grow Light! - Hydroponics HID! on eBay, also Hydroponics, Plants Seeds Bulbs, Garden Plants, Home Garden (end time 15-Mar-09 12:55:07 GMT) What do you think. comments greatly welcomed. Will cost me around £100 including p&p so want to be as sure as possible that im making the right Rating: 5