ozzyoutdoors Posted January 5, 2015 Report Share Posted January 5, 2015 hey guysgot a few outdoor\indoor goin on,out during the day at 7am in the tent at 7pm,just to give us a smoke got a fan running when there in,but alot of moisture in the mornings,got a couple of 4inch fans,to put in so question,do i have the fan pulling air out at the top or bottom?? cheers people. Quote Link to comment Share on other sites More sharing options...
Ford Fairlane Posted January 5, 2015 Report Share Posted January 5, 2015 gday Ozzyoutdoor. Hot air rises, thus, the extraction fan goes at the top, intake at the bottom. an intake fan is often not necessary, as the outlet fan will pull air into the room from a passive inlet Quote Link to comment Share on other sites More sharing options...
ozzyoutdoors Posted January 5, 2015 Author Report Share Posted January 5, 2015 hey ff yea was gonna work on that therory,hot air rises just got a normal fan pushing air round in there just need the one to pull her out too easy had some hydys goin a few times,never had much luck reallyallways do better outdoors.prefer outdoors anyways really cheers Quote Link to comment Share on other sites More sharing options...
henheman Posted January 15, 2015 Report Share Posted January 15, 2015 gday Ozzyoutdoor. Hot air rises, thus, the extraction fan goes at the top, intake at the bottom. an intake fan is often not necessary, as the outlet fan will pull air into the room from a passive inletWhat do you mean by passive inlet? I have a tent and looking atget an 8 inch ducting and fan, but how do i get air intake without releasing smell? Quote Link to comment Share on other sites More sharing options...
Knarfman Posted January 16, 2015 Report Share Posted January 16, 2015 I have a 8inch system running in my 2.4 x 1.2 x 2.0 tent on a speed controller. And even at the lowest setting it runs enough to suck in the sides of my tent. If the fan is running with the vacuum sucking air in through my passive inlet nothing gets out. But if I turn the filter off then you do get smell though the passive entry, so it means the moment they start to smell the fans on all the time. I built a window mounted air box with light traps. The exhaust goes out the top of the box and the inlet for my tent is connected to the rest, this way I'm pulling fresh air in all the time. I have the 8 inch inlet going from the window in through the side vent that was in the tent and sealed up with silver tape. Eventually when I setup the veg/auto tent the 2 tents will be connected and both running the off the same filter but with a small 4 inch fan add to the fresh air duct to force outside air in. Quote Link to comment Share on other sites More sharing options...
Ford Fairlane Posted January 16, 2015 Report Share Posted January 16, 2015 What do you mean by passive inlet? I have a tent and looking atget an 8 inch ducting and fan, but how do i get air intake without releasing smell?Passive inlet= no fan on the inlet. The smell doesn't escape because the outlet fan is constantly pulling air through the opening at the inlet. Quote Link to comment Share on other sites More sharing options...
grow for me Posted February 13, 2015 Report Share Posted February 13, 2015 Gday all my local hydrponics store owner wants me to buy 2 hyper fans 300 bucks a pop. 1 is for extraction the other for inlet. My tent is only 1.4 by 1.4 by 2.4 he wants me to get 2 6 inch hyper fans. I'm thinking 1 for extraction is enough with a passive air intake. What do you all recommend Quote Link to comment Share on other sites More sharing options...
Sixty-Eight Posted February 13, 2015 Report Share Posted February 13, 2015 last time i was in a hydro shop i asked the bloke to test a few of the fans he had laying around one was the hyper 6" fan fuck it moves a fair amount of air for its size but its very loud, it does come with a speed controller so u can turn it down as much as u need tho 1 is plenty for your room Quote Link to comment Share on other sites More sharing options...
Dingo-2008 Posted February 13, 2015 Report Share Posted February 13, 2015 What Sixty Eight said is about rite,1 of them hyper fan would be plenty to as it will move around the same amount of air as a 250mm-Max-Can-Fan,As I have a 250mm-Max-Can-Fan,An that fan is in a grow room {2mt X 3mt X 2400mm high } an move plenty of air to keep my room cool an supply it with plenty of fresh air. But I do have another 250mm fan sucking fresh air into the grow room if the weather gets to hot. If you live where to weather gets very hot you may need another fan to supply fresh air into the grow room. But you will find that the one 250mm hyper fan will be plenty as you will most likely need to use the fan speed control to slow the fan down to suck less air into your grow room as the wall will most likely be sucked in. Hope this info helps you. Regards Dingo-2008. Quote Link to comment Share on other sites More sharing options...
grow for me Posted February 13, 2015 Report Share Posted February 13, 2015 thanks fellas i thought about as much. he was saying something about a vortex being created inside the room if i didnt use the intake fan. saying that i may suck to much out with just the extraction but im thinking thats what the fan speed controller is for haha thanks again fellas one fan it is i think. Quote Link to comment Share on other sites More sharing options...
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