fan requirements for cooltube and carbon scrubber

A

aggrown

Member
hey everyone,
i am planning to build a grow closet (200cm x 90cm x 60cm)
my first choice of light is 250w hps ( i guess its enough for 60 x 90 cm area)
and i will be using a 200m3 carbon scrubber which is the smallest i can get)
my problem is that i cant decide what kind of fans to use. stealth and silence is top priority for me. so i need to use a silent model. my options are using a soler palau td 350/125 silent mixed fan which works 380m3/h and attach both scrubber and cooltube to it. problem with this fan is it is huge like 47 x 26 x 21 cm and i have to make a lot of curves with the duct if i use this set up.
or i can purchase the soler palau td silent 160/100 N 180m3/h. one for cooltube, take air from outside and blowing it outside ( two 90 degree angles on the duct) an one for the scrubber.( one 90degree angle). since i live in a very hot region heat is really going to be an issue for me.
i really need advice because i am a newbie to the fans and how much pressure they create. are these fans enough or too much for the set ups i described? or would a regular axial 180 m3/h fan work with cooltube closed ventilation system / td 160/100 be enough for both scrubber and cooltube / or should i just use cfl lights to prevent heat issues(i am not sure how good buds grow with them? the salesman tells me to buy the 250/100 or 350/125 fan and use it for both scrubber and cooltube but i am not sure. as i told before silence and heat is very important for me. i seek everyones advice. thanx
​
 
fwiw, I have a TD100 connected to a cool tube in my 3'x2'x5' tent and it works like a charm. The TD100 is amazingly silent.
 
I have a scrubber, then cool tube then td100 venting out. My temps are about 5-6 degrees above ambient. I keep the house around 72 so my temps are fine in the tent.
 
No presonal experience with it, but I think Fantech FR100 should fit your requirements, its a 108CFM centrifugal fan, deviding by a factor of 0.588, you get ~183.7m^3/h, Seems pretty fitting for your filter, and from the reviews I've seen it seems like a reliable and quiet fan.
 
i cant order internationaly and i only have limited variety of models here but i think the td silent 160 fan creates the similar pressure with FR100 .if 108 cfm is enough than i can use exclusive fans for both scrubber and the cooltube.if they are strong enough to cool the closet too than great,( i live in a very very hot region and in the mid summer the room temp goes higher than 85 by itself).thanks for your advice...
 
Yeah heat sucks, I live in a pretty hot place as well, just mentioned it on the thread I opened, 90F on average throughout summer...well that's the Negev for you.

BTW: you should consider turning the lights on at night in the flowering period, that way you might not need a cooltube.
 
good idea turning the lights at night but i will use the closed cooltube circuit any way. may i ll have to install aircondition to the room, besides the plants, i need it anyway..

"Yeah heat sucks, I live in a pretty hot place as well, just mentioned it on the thread I opened, 90F on average throughout summer"
so what does temp reach inside the closet and do the plants do ok with that temp?
 
Sorry but i can't help you on that area since I haven't tried it in here yet, but I have a friend who had some heat problems(~90F, or a bit less), and it just made the plants grow slower.

I think it's also strain dependent, so I can't give you a clear answer of what will happen in such heat.

Anyways I'll have an answer in the coming months, if its still relevant.
 
thaks man. worst case scenario i will have airconditioner installed like i said.
i have some questions about where to exhaust too but i think i should start a new topic for that.
 
what if i connect two 4 inch duct boosters(180m3/h 100cfm in metric) to the cooltube and td100(180m3/h 100 cfm in metric system) to a 200m3 scrubber. do you they will sufficient? especially the duct booster fans?
 
Tried it...I think everone does. One duct booster went back and one is on the floor. Save yourself the hassle and get an inline. My box is now 4 degrees over ambient and the best its ever going to get. When I ran 250w, I could keep the cool tube 4-5 in off the tops.
 
This is more of a question on the S&P TD100. Is this a inline fan or a booster? I guess what I'm getting at is, if I attached the scrubber to the end of the fan will this fan generate enough pressure to suck through the scrubber? Or even a DIY carbon filter.
 
Hey this isnt a comment concerning your fan or filter, but you should still know:

Do you already have the cooltube?

If you're lighting from the top, then consider buying a hood. Cooltubes are best used vertically, not horizontally. especially if they're like these ones:
http://www.google.com/products/cata...a=X&ei=rOhmT8eaI5P8iQLj4-WhDw&ved=0CGgQ8gIwAA

They're gonna shoot light in 180 degrees from the bottom half of the bulb.. its not the best light throw for your plants, unless you run a scrog in a 'U' shape under it.
Just letting you know, if you're lighting horizontally, you might want to consider a hood.

Check out this chart:
http://www.greners.com/reflector-test.html

If you can make it happen, get a hood. Cooltubes are best used if you take out the reflector and run them vertically.
Good luck
 
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