Need a proper inline fan

[DSXJ]

Hey guys, I need a proper fan that will push air through my cool tube and filter enough to keep my room cool.

Tent size :

2' x 4' x 5'

Light size:

600w

Building my cool tube tomorrow or the day after, have 4" ducting already installed in tent.

Thanks~

 

[The303Stoner]

any 4" will work the more expensive ones are usually quieter. i like vortex dont for get your filters

 

[DSXJ]

So a 4" 175 cfm fan would keep my bulb cool and push through a carbon filter?

 

[Padox]

One very important thing to remember mate is that fans are very effective at sucking and not so good at pushing.. may be a little hard to wrap your head around but trust me, this is the case. If massive amounts of air flow is needed a 'centrifugal' fan is most effective per diameter and quiet but with a room the size of yours a simple inline fan will be fine and fairly cheap if noise isn't a problem. this should exhaust straight into a short piece of duct (preferably larger diameter)at most as it exits the room. if possible mount the fan outside the room but no problem mounting inside directly on the outside wall pointing out. Fan should be sucking though the majority of ducting(ie: cooltube and carbon filter on end) and therefore be sucking air through your filter, through your cool tube and out of the room. This will inturn cool the tube with filtered air from in the room and create negative pressure sucking cooler outside air into your room. If you want to filter the air going into the room you would have filter right where the air is coming in and fan exhausting directly into room. hope this makes sense. Any questions please ask as this is a major part of my job I just have problem explaining myself sometimes

 

[Cheeba420]

Wait padox so I wouldn't necessarily need an intake fan if I can create a great enough negative pressure with the fan i buy because there's about an inch or two gap from where the door doesn't touch the floor if I jus put some mesh to filter it through

 

[Padox]

Well you wouldn't need an intake fan if you have a fan sucking the air out of the room and exhausting else where. a fan sitting in the room blowing around will never create negative pressure. and really, a filter on the incoming air isn't necessary unlessthe air coming in is very dusty or bugs could enter etc

 

[Cheeba420]

How come it won't create a negative pressure, so what would be better to have a negative pressure to have fresh air coming in or to have a fan blowing inside. And I'll need a filter I have a dog

 

[DSXJ]

Your dog shouldn't be much of a reason for a filter unless you're growing where he sleeps! lol

Most vents are made higher up rather then at the bottom of your grow, I'm sure your dog isn't 6 feet tall

Anyway, I'm going to order a 175-190cfm inline fan to pull air through my cooltube and through a fresh air intake.

Basically :

Intake > ducting > cooltube > ducting > carbon filter > 4" fan & my heat problems should be longggg over.

Ordering fan this weekend since my town has NONE --- pathetic.

 

[Padox]

How come it won't create a negative pressure, so what would be better to have a negative pressure to have fresh air coming in or to have a fan blowing inside. And I'll need a filter I have a dog

well your room wants to have the same amount of air in it at any one time so by having a fan suck air out of your room, other air will have to come in from somewhere else such as a cut open hole or in my case a number of ducts with no fans in them - your case from under the door. What I mean to say is you will have a lot more luck sucking the air into the room via an exhaust fan than you will trying to push cool air in via an intake fan... have both fans is the ultimate really but only in larger grows. You can get adaptors that are made for the venting of portable a/c's that are designed for exhausting hot air out, they fit snugly into a cracked open window. you can use this so you would have carbonfilter straight onto fan and straight onto a short duct attached to window mounting and as blows filtered air out of your house it sucks new air in under the door

 

[Padox]

Your dog shouldn't be much of a reason for a filter unless you're growing where he sleeps! lol

Most vents are made higher up rather then at the bottom of your grow, I'm sure your dog isn't 6 feet tall

Anyway, I'm going to order a 175-190cfm inline fan to pull air through my cooltube and through a fresh air intake.

Basically :

Intake > ducting > cooltube > ducting > carbon filter > 4" fan & my heat problems should be longggg over.

Ordering fan this weekend since my town has NONE --- pathetic.

What id recommend as a slight improvement is Intake>>> straight into your room and ending as soon as it enters and doesn't join with cool tube at all. this is obviously where fresh air enters your room and replenishes natural co2 levels for plants. Next you hang you carbon filter up high and have Filter>>>cooltube>>>inlinefan>>>outside your growspace. Obviously have the air sucked into the filter and out of the room and air will naturally flow in through static intake vent/s.

 

[DSXJ]

Makes perfect sense, as long as I wont get any smell coming out of the intake.

 

[Padox]

Be super duper tight on your connections and have a renowned carbonfilter connected there should be no smell. Good luck my friend

 

[DSXJ]

Perfect, I plan on ordering :

1x iPower 4" inline 175cfm fan
1x iPower 4" carbon filter

Would that be enough for my room and light?

600w w/ cool tube
2wide x 4long x 5high

thx +repd

 

[Padox]

More than enough, only thing you will have to play with is the fact a 4in in duct wont be enough, id day you will need 8-10in inlet or combination of inlets. Especially considering your not even letting heat from the light into the room effectively. thanks for reps

 

[Cheeba420]

Thanks you guys are a lot of help I went on --------- forums and none of those assholes even responded so your help is greatly appreciated.
But padox if I have the filter up high wouldn't that be sucking hot air through the cooltube or it'll cool down because of movement and did u forget to add the ducting in there but yea I'm gonna do it that way
6" inline fans and carbon filters

 

[GreatLife4All]

I have a 175 CFM inline booster fan hooked up to a carbon filter in my drying tent.

Going thru the carbon filter REALLY reduces the air flow.

Here is a thread I wrote that contains information about how to calculate your ventilation requirements: Setting for another indoor round! Need advice

One tip - it is not the rating on the fan... but the amount of airflow out of the tent.

 

[Cheeba420]

Yeah I know the requirement we're just trying to figure out a effiecient ventilation setup for my closet grow
I'll post a pic of the room when I get home and show what I have where I want holes and everything else
I know that'll help a lot

 

[DSXJ]

GL4A -- Do you think it would be wise to push through the filter rather then pull?

Kinda Cool tube > ducting > filter > fan with intake being open and not connected.

I dont wanna order a 175cfm fan if it's not going to create the air flow I want to keep a 600w cooled in the 24x48x60 tent.

Thx for your help boss, +rep

 

[GreatLife4All]

It is a toss up and I don't know which is actually better.

If you are "pulling" air into the fan from the lights - then you are pulling extremely hot air through the motor of the fan. This will lessen the life of the motor.

But these types of fans really are designed to pull - rather than push - air.

So I "pull" air through my carbon filters. On the light - I have tried it both ways and didn't notice much difference. I am currently pulling air from the lights, through my fan, and then "blowing" it out of the room. I have a (non-carbon) filter attached to this one as well.

I have opted for higher air flow - rather than longevity of the fan motor.

 

[GreatLife4All]

GL4A -- Do you think it would be wise to push through the filter rather then pull?

Kinda Cool tube > ducting > filter > fan with intake being open and not connected.

I dont wanna order a 175cfm fan if it's not going to create the air flow I want to keep a 600w cooled in the 24x48x60 tent.

Thx for your help boss, +rep

That tent is small in comparison to what I am used to. No insult intended, I just don't have the experience to confirm.

Theoretically, I will state that it should work. My fear is that the 600W light will generate a lot of heat in that space and will increase the needs for ventilation above what we think. But it is a fear... not a reality.

And I have already admitted, I would never go small or even close to "good" for ventilation. The more the better as this is critical for good growth.