The Budfather
Active member
title says it all its ina small cabinet witha 250... and a carbon scrubber, will it be enough to pull air thru the scubber a very short distance and still cool the 250?
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4 inch axial fan enough for a 250?
- Thread starter The Budfather
- Start date
Ive got a 4" axial fan in a C4 cabinet I use for cloning/vegging. It moves a decent amount of air, around 100 CFM I believe. I know for sure the fan could vent your light but I dont know about pushing through the scrubber.
Ive got a 6" duct fan on a homemade scrubber and it only pulls air through the top of the scrubber. I need a 4" in vortex to really get the job done.
Hope this helps some..
-Funk
Ive got a 6" duct fan on a homemade scrubber and it only pulls air through the top of the scrubber. I need a 4" in vortex to really get the job done.
Hope this helps some..
-Funk
LORD BENIS
Member
4 inch axial fan enough for a 250?
Same question. I'm worried about noise from an inline fan in a C-13. I'm only vegging in the C-13 so no carbon scrubber.
Same question. I'm worried about noise from an inline fan in a C-13. I'm only vegging in the C-13 so no carbon scrubber.
greenisgold
Member
I doubt it. Most are rated around 70 cfm, give or take. But they are quiet as hell at around 38db +-.
You could have a few. One pulling air in, one pulling out and one hooked up to the scrubber, but that may negate the sound because you now have 3.
http://www.coolerguys.com/ac120vfans.html
You could have a few. One pulling air in, one pulling out and one hooked up to the scrubber, but that may negate the sound because you now have 3.
http://www.coolerguys.com/ac120vfans.html
G
Guest
That axial fan won't work./
Get a Dayton Model 265 squirrel cage type blower. It'll work well for you. Squirrel cage blowers are a lot quieter than Vortex type blowers too. I live in an apartment with people living above me. I have the much larger dayton 465 and it runs outside my grow tent, un muffled. Never had a problem with noise.
MT
Here is my 465 sitting out in the open.
Get a Dayton Model 265 squirrel cage type blower. It'll work well for you. Squirrel cage blowers are a lot quieter than Vortex type blowers too. I live in an apartment with people living above me. I have the much larger dayton 465 and it runs outside my grow tent, un muffled. Never had a problem with noise.
MT
Here is my 465 sitting out in the open.
G
Guest
greenisgold said:
None of those fans in that link will work with a scrubber. You could put 10 of them in line.
Scrubbers require substantial blowers to suck air through them. There is a lot of resistance to air flow from all that carbon. You need POWER to get air through scrubbers. Squireel cage blowers and Vortex type blowers are made to work against big loads...like scrubbers.
These small fans are OK for bringing air into a grow through little or no resistance, but they will NOT work with scrubbers. period. Don't let people tell you differently.
MT
LORD BENIS
Member
What if your not scrubbing and just vegging?
Would an axial fan be able to keep temps under control in a C-13 with a 250 in it?
Would an axial fan be able to keep temps under control in a C-13 with a 250 in it?
E
eLiguL
Its a shame when people you something will not work when others are actually doing exactly what they said will not work.
Ghost uses Axial fans in his 250w cab.
CLICK HERE TO SEE THE CAB
Cheers
Ghost uses Axial fans in his 250w cab.
CLICK HERE TO SEE THE CAB
Cheers
G
Guest
LORD BENIS said:
IMO Yes, not having personal experience with those components, I can't say for sure.
As for the comment about Ghost and his setup...working when I say it won't. That's fine. Maybe it works for him. Personally I have doubts about how well the air is being scrubbed. Strain is a factor. I bet he isn't growing NYC Diesel
If you aren't using a scrubber and just need a cooling/venting fan...then there are LOTS of choices for fans/blowers out there. Too many to list.
One question you need to ask when looking at what fans/blowers will work with scrubbers is this:
If these inexpensive fans like the one in the link above will work, WHY do so many growers choose to spend 10x 20x times the money for Vortex or Dayton type blowers? Are these folks just fools?
Respectfully
MT
G
Guest
I'm just home for lunch. I'm not trying to start a quarrel or argument. I just don't want someone to buy something that may not work for them.
My experience is with a little larger growing areas than this guys cab. It may be that in these very small cabs you can get away with the greatly reduced flows and efficiency that using fans like in the link result in.
If your cab is only 30-40 ft3 and you want to change the air 3 times a minute, you'll need a system that will give you at least 100ft3/minute through whatever scrubber you're using. I don't see how the fans in the link above can pull 100+ ft3/minute thru a decent scrubber, but if you guys tell me they will, I'll shut up and accept it
MT
My experience is with a little larger growing areas than this guys cab. It may be that in these very small cabs you can get away with the greatly reduced flows and efficiency that using fans like in the link result in.
If your cab is only 30-40 ft3 and you want to change the air 3 times a minute, you'll need a system that will give you at least 100ft3/minute through whatever scrubber you're using. I don't see how the fans in the link above can pull 100+ ft3/minute thru a decent scrubber, but if you guys tell me they will, I'll shut up and accept it
MT
E
eLiguL
MTweedman said:I'm just home for lunch. I'm not trying to start a quarrel or argument. I just don't want someone to buy something that may not work for them.
My experience is with a little larger growing areas than this guys cab. It may be that in these very small cabs you can get away with the greatly reduced flows and efficiency that using fans like in the link result in.
If your cab is only 30-40 ft3 and you want to change the air 3 times a minute, you'll need a system that will give you at least 100ft3/minute through whatever scrubber you're using. I don't see how the fans in the link above can pull 100+ ft3/minute thru a decent scrubber, but if you guys tell me they will, I'll shut up and accept it
MT
You make many good points in ur two post and I didnt mean for my post to offend you (accept my appology if it did). I should also note that Ghost does change his fans out when they begin to wear down (when it starts to get louder). Also, he has 2x 75cfm axial fans in his setup, one dedicated to the scrubber and one for the "electrical" room.
G
Guest
eLiguL said:
Hi again!
And NO, absolutely no apology needed. I didn't take it that way. I just wanted to be more clear about what I was saying.
Here's my perspective on blowers since I have a technical background and have worked with fans and blowers of different kinds for years...just not in weed applications.
The axial fans in the link are made for applications where they do not meet much air flow resistance, or put another way....they do not have to "work against a load". You see these fans used frequently for cooling an equipment cabinet. They blow air into, or suck air out of, things like computers and other such equipment. The most load they work against is typically some sort of screen type dust filter.
And so these fans work fine for weed growing when used to pull fresh air into a grow and no filter is involved.
Now, when you try to use one of those fans to pull air through a carbon filter(or push it through), heres what happens...and the more resistance to flow there is the more this effect happens. The design of those fan blades is such that air slips back past the blades as loading(resistance to flow) increases. This is a from of cavitation. As long as the air being pulled or pushed by the fan is free to flow, this slippage won't occur and you'll have good airflow.
Blowers like the Vortex are able to work against a load(carbon scrubber) because they work sorta like a "supercharger". They have powerful motors to achieve this...which is one reason IMO why they are noisy. The act of supercharging the air to drive it through(or pull it through) the load(scrubber) requires power hence bigger and noisier motors.
Squirrel cage blowers work a little differently. The motor drives the "squirrel cage". If you look at a squirrel cage you'll notice the each blade is like a "cup". The cage is then made up of MANY cups. As the motor rotates the squirrel cage, each of those blades "scoops" up some air and carries it around to the discharge port of the blower. The design of the squirrel cage makes it hard for the air to "escape" the cups. The air can't slip back behind the cups like air can slip around behind the blades of an axial fan.
Now those individual blades or "cups" that make up the squirrel cage offer a good bit of resistance as that motor rotates the cage. Cup your hand and stick it out a car window at 60MPH. Remember that cage is rotating at 1000-2000 RPM FAST. Lots of resistance to those blades/cups catching air...and so therefore it requires "power" to drive it...and that means a bigger more powerful motor...just as Vortex styles do in their operation.
There's no free lunches in physics. If you want to drive air through a resistance like a carbon scrubber, there is no substitute for power. And the fans in the link simply don't have the power necessary...in my opinion to work efficiently with the scrubbers I am familiar with.
I'm frequently wrong about things, especially if I have been smokin
But that's the way I see things.
Good luck and grow ON!!!!!!!!
MT
switch-one
Member
240cfm axial fan
240cfm axial fan
what about a 240cfm axial fan hooked up to a 8x14" scrubber?
240cfm axial fan
what about a 240cfm axial fan hooked up to a 8x14" scrubber?
I cooled my 250 with a 4" 76 cfm axial. It could handle a DIY odorsok type filter but, that filter only worked on low odor strains. First stinker I had over powered the filter on day 3 of 12/12.
My 4" S&P td100x is only 6" in diameter, as opposed to a 4" Vortex which is 12" in diameter. Now that I've experianced how superior the sucking power of a centrifugal (Vortex, Elicent, CanFan) is compared to mixed vent (S&P) I'd recommend S&P buyers go one model up. If you need 100 cfm, get a 150. If you need 150cfm get a 200.
I LOVE my S&P but it just doesn't suck (or scream) like a Centrifugal
My 4" S&P td100x is only 6" in diameter, as opposed to a 4" Vortex which is 12" in diameter. Now that I've experianced how superior the sucking power of a centrifugal (Vortex, Elicent, CanFan) is compared to mixed vent (S&P) I'd recommend S&P buyers go one model up. If you need 100 cfm, get a 150. If you need 150cfm get a 200.
I LOVE my S&P but it just doesn't suck (or scream) like a Centrifugal
