needing a Exhaust fan for 2x4x5 tent

i need help picking out 2 exhaust fans and plan on using passive intakes at the bottom
do the cheaper inline fans from htg move air well? the cfm ratings seem right mathematically.. or do i need the 171cm high velocity fans? also, what are the noise levels on nthem for those of you who have them?

there will be two tents same size. both 40cu ft

one tent will have a 250w hps (flower)....which would i need
http://www.htgsupply.com/viewproduct.asp?productID=52557

or

http://www.htgsupply.com/viewproduct.asp?productID=46447

and same for the other tent with a 4ft 4 lamp T5 (6500k) (vegging)
theres less heat emitted from the t5's so can i get away with the cheaper inline fans

**i will have fans inside both tents oscilating or blowing up from the bottom

anybody? bump

bump bump bump

60 views and nobody has any input??

what do you guys use for exhaust fans??

can those inline duct fans cut it?

how loud are the 170 cfm fans? if i bought this fan id get a controller to slow it down a lil

i will have fans in the tent oscilating to improve airflow as well...passive intake btw

2x4x5 i would assume u can get away with 2 of the 6inch booster fans, my tent is a little bit smaller and i am currently waiting for 2 of the booster fans, they should come in tomorrow

how big of a light are you using? carbon filter too?

let me know how the fans work and how loud they are. im tryin to keep my noise down cuz im in an apt.

im in an apt also so u should get a good idea based on my stuff
i use a 400w hps, check out my grow in my sig
no carbon filter as of now, but i may end up making my own later down the road

nice setup dude. lemme know how those fans work out when they come in. id like to get those if theyre sufficient so i dont go and spend 200 bucks on 2 fans and 2 controllers ( the 4" growbright 171cfm from htg supply)

btw.. did you get that tent off ebay? lighthouse or something like that on the front of it? if so, ill have 2 of the exact same tent in a few days. how do you like yours?

man i had a loooong ass post that i wrote out for you last night but then my friend came over and i got way to high and just turned my comp off haha.

The fans came today... not what i expected really at all. I thought they were already going to have the plug on them, but i had to go to home depot and buy that. what a pain in the ass, mainly cuz i just got sick today but meh, w/e
I just hooked both of them up one bringing air in and one taking it out. its been running for about 15 minutes now and the temp was reading 100, but i dont believe it cuz i put my head in there and it felt pretty damn comfortable.

Yes it is the same exact tent, bro i love it. It has such nice lining on the inside, and for 89 bux fuck yes!

i ALWAYS ALWAYS ALWAYS ALWAYS x 1000000 ALWAYS recommended at minimum of a 6in/400CFM fan when running anything over 400w. My reason? they are not that much larger then a 4inch fan and you can get a speed adjuster for it to cut down on noise and elec.

Remember, a 4in fan at max is pulling 200CFM and will be loud as shit. a 6in/400cfm fan at 50% power will be near silient while still drawing the same amount of air. Plus, you can always scale better when going with bigger/more lights.

I have a 3'x3'x6' and run 250W in one and a 400W in the other, 4.5Axial intake fan plus passive intake, 190 CFM 4" exhaust with carbon filter works good for me Fan speed 60-70%

ninjagaiden said:

i ALWAYS ALWAYS ALWAYS ALWAYS x 1000000 ALWAYS recommended at minimum of a 6in/400CFM fan when running anything over 400w. My reason? they are not that much larger then a 4inch fan and you can get a speed adjuster for it to cut down on noise and elec.

Remember, a 4in fan at max is pulling 200CFM and will be loud as shit. a 6in/400cfm fan at 50% power will be near silient while still drawing the same amount of air. Plus, you can always scale better when going with bigger/more lights.

Click to expand...

we have been talking about using a 6inch all along