Fan and filter question

I have a room 5x5x6 and I need to get my ventilation figured out. I ran lines and vents for my light hood but the room is obviously getting warm now with 1000w MH. So I'm on a budget was going to use regular fans and create my own vent system but decided to get a fan and filter. Here's what I bought off amazon.


Now I'm aware the fan is 6" and filter is 4, I'm just going to put a reducer on the fan. This will be high on the wall while I'll have my own household fan pushing air in the bottom through my own creation lol. Now my questions are do you guys think this will be enough flow to lower temps by about 3-4C? Also anyone used this filter before and have a review of it? I'm curious if it will get rid of the smell but I honestly don't care if it does.

From my limited experience unless you're going to put an a/c unit in the room, the fan isn't going to do much temperature wise. But you should have it of course. IMO you might look into an air cooled hood which you would hook up to the fan and filter. That dropped my tent temps by about 5C.

You need an inline fan. Use a variac not a cheap controller. Get a filter a couple sizes bigger than the fan and use a reducer.

Chef420 said:

From my limited experience unless you're going to put an a/c unit in the room, the fan isn't going to do much temperature wise. But you should have it of course. IMO you might look into an air cooled hood which you would hook up to the fan and filter. That dropped my tent temps by about 5C.

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I am running a cooled hood and already have a fan and lines hooked up to it. That helped a lot. But I need it to be a little more cool, only a few degrees and its in a cool basement. If I leave the door open it easily stays below 25, but when I close it I have no air exchange.

whitebb2727 said:

You need an inline fan. Use a variac not a cheap controller. Get a filter a couple sizes bigger than the fan and use a reducer.

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Curious why you would want a filter bigger than the fan? Wouldn't that just make the fan struggle to push air through the filter and be less efficient? Oh and that fan is inline, do you mean a centrifugal fan?

Boomy said:

Curious why you would want a filter bigger than the fan? Wouldn't that just make the fan struggle to push air through the filter and be less efficient? Oh and that fan is inline, do you mean a centrifugal fan?

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No. The hydro and online shops want you to think that. It makes you replace your filter more often. A bigger one will last longer.

I also refill mine.

Phresh, can, mountain air are good filters.

I run a cheap ventech inline fan from amazon. I got the fan and filter for less than a $100. I refilled the filter later. The cheap fan has been running for two years now almost non stop.

whitebb2727 said:

No. The hydro and online shops want you to think that. It makes you replace your filter more often. A bigger one will last longer.

I also refill mine.

Phresh, can, mountain air are good filters.

I run a cheap ventech inline fan from amazon. I got the fan and filter for less than a $100. I refilled the filter later. The cheap fan has been running for two years now almost non stop.

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Good to know, I just bought this stuff so I'll make it work for this grow but I'm probably going to switch it up for the next one. Or just set up a second grow lol. Thanks

Boomy said:

Good to know, I just bought this stuff so I'll make it work for this grow but I'm probably going to switch it up for the next one. Or just set up a second grow lol. Thanks

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No problem.

nxsov180db said:

The fan that you have will barely move any air, you want an inline fan not a duct fan. You said you have an air cooled reflector, what kind of fan is hooked up to it? And a bigger filter will actually be easier to suck air through (more surface area=less resistance) and of course as whitebb2727 said a larger filter will also have a longer life span..

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I hooked up a duct fan for the light hood and it works awesome. I figured with my grow space being 150 cubic feet and a fan that moves 240 cfm that would be plenty. oh well too late now I'll see how it goes when i get it all hooked up!

Good to know, thanks. I'll probably change them out after my first harvest. I've sunk lots of money into this and up I gotta get a little back before I can spend more lol. Eventually I'll have all the best gear lol