So will it be enough to have this fan to fully ventilate 4x4 grow tent? http://www.ebay.co.uk/itm/4-Hydropo...Name=STORE:HTMLBUILDER:SIMPLEITEM&refid=store As I understood it can push air in & out, is that correct? Or only out? Thanks 

So will it be enough to have this fan to fully ventilate 4x4 grow tent? http://www.ebay.co.uk/itm/4-Hydropo...Name=STORE:HTMLBUILDER:SIMPLEITEM&refid=store As I understood it can push air in & out, is that correct? Or only out? Thanks![]()
Well maybe this fan will be alright? It's about 170CFM. How do I suppose to wire it up? http://www.e-senukai.lt//kanalinis-ventiliatorius-vents-150vko_2.html
My closet is 4x2x8 and I basically utilize a 2x3 area for my grow. Not vertical and I have a vented hood. I duct from carbon filter to hood to fan and pull heat and smell and exhaust into attic. Ambient temps will play a part but my closet runs 76-82 depending. In summer as it heats up the spare room it gets warm. If I take out the glass in my hood it raises temp another 3-4 degrees. I ended up buying another fan for intake to help with air exchange. I thought that 6 inch booster fan would work great. It was weak even though rated well. A 5-6 inch computer type fan was way better but kind of loud. I tried and returned both and actually found a 5 inch fan from local store that worked well and was quite. The 4" vortex fan 160 cfm I use to exhaust is a lot more powerful than the 6" booster fan. I tried that exact same fan he linked too from Home Depot too.
So what do you guys think about this
http://www.e-senukai.lt/santechnika.../kanalinis-ventiliatorius-vents-150vko_2.html ? Should I be alright with 170cfm fan?
You were on the right track with your first post. You want an inline fan. I would go bigger and buy a speed control so you can dial it back or run full throttle if needed. Those little computer fans, duct or booster fans will work well for intake or small cabinets but if your using a 400 veritacle open light it is going to put out some heat! Maybe even something like this
http://www.saferwholesale.com/produ...179&gpla=pla&gclid=CO7ho4CHwbgCFYdQ7AodTUIAgQ
I think that fan would be fine for vertical grow, if not I'll have to buy something else as well. So I just cut back from this cord and connect those cables to that fan? http://www.nix.ru/autocatalog/cables/384_2254_draft_large.jpg
Sorry for so many questions guys, first time grower hereI'm just being afraid that 170cfm fan won't be enough to cool down 400w hps in vertical grow, or shouldn't be I be afraid? And how many fans do I actually need? 1 for cooling down the bulb and that's enough? I would need another one in order to receive fresh air, that's right?