Quote Originally Posted by tripleblack
My GR measures about 3'x3'x6'. The growshop dude recomended one of these...

http://www.hydrogarden.com/StockPics/TDmixvent_fan.jpg

which removes 350m³/hr and costs £95


Do you think the cheaper one will suffice?
I have seen those idential fans at half the cost and half the exhaust, 160m3 if I remember rightly, see if you can get a less powerful one.