Anyone Help me with this cool tube question pls!

[Clever Swine]

will a 105cfm effectively cool a 400w bake a round cool tube setup?
It looks the part but im not sure, What cfm would i need to do it very efficiently?

[latewood]

if you have it...put it together and find out.

[turtle420]

Best answer, is latewood's... but my answer might add a little.:::

I have a Bake A Round cool tube setup... It's running a 400W MH inside, and it's getting the air pulled through by a 90CFM 6" fart fan.

It works. The cool tube isn't "cool" to the touch, but it works fine.

Hope this helps,

-turtle420 :cool:
.

[latewood]

thanks turtle...so you like your's huh? Sounds like you need more fan though...at least now we have a benchmark...now, if someone builds CT with bigger fan, such as above, we can eventually come to a cfm, that makes BAKE-A-ROUND cooltube 'COOL' to the touch.lw

[litespeed]

I have a 500 CMF squirrel cage on 6 lights, it makes BAKE-A-ROUND cooltube 'COOL' to the touch.oh watts 400-1000

[BukDatAss]

Damn I cant wait to get my 465CFm for the next grow then that thing would work for sure then..? Cause now I have a 80Cfm boster fan and it doesnt do the job to the T its oK but I cant leave my closet door closed:( I'm sure when I get the 465Cfm it would to the job and There would be no more light in my room:) I wanted to know about those strong CFM fans, do they make a lot of noise... I mean how loud compared to a regular standard 12inch home fan? I was lookin at the Dayton465Cfm or an ActiveAir465Cfm

[turtle420]

thanks turtle...so you like your's huh? Sounds like you need more fan though...at least now we have a benchmark...now, if someone builds CT with bigger fan, such as above, we can eventually come to a cfm, that makes BAKE-A-ROUND cooltube 'COOL' to the touch.lw
Hey LateWood,

As you so kindly suggest, now we've got a "benchmark" to the lowest possible CFM rating for a cool tube. So, anybody that's a cheap MoFo (like me), can use 90CFM. lol !!! :D

I want to upgrade my fan... maybe something around the 200's CFM. Less than 300CFM. It would use that fan to cool the cool tube, and the ballast. Something I'm thinking: If I get that bigger fan, I can get a dimmer switch... then, "dim" the fan until I find out what speed (aprox CFM) will the cool tube be, um, "Cool".

,><<>>
Buk,
A 465CFM fan? Dude, you'll be set with that thing. No doubt. I don't know about the noise, but it'll definitely exhaust your room. For NVH (Noise, Vibration, Harshness), you could install the fan inside a box, and hold it down with bungee cords or something similar. ???

Best everybody,

-turtle420 :cool:
.

[Clever Swine]

I was worried about noise too cos stealth is of the essence. When you live with yer mam and dad.

[turtle420]

I wanted to add some more input to my low CFM cool tube setup...

About 2 months ago (I think), I had a malfunction with the cool tube fan's (6" 90CFM) timer... and it ran (I'm guessing) around 14-16 hours without any kind of ventilation... the bulb didn't pop (again, it's a 400W MH).

The cool tube, PVC setup thing was SUPER hot... I turned ON the fart fan, and around 1 hour later, it was down to more acceptable levels.

I just found that noteworthy...

Best,

-turtle420 :cool:
.

[BukDatAss]

dAMN I might have to go with a Blower in the 200s

[latewood]

I've got a big ass squirrel cage...but, I got lazy and put in a window unit...for 80 bucks, because the fans I want are going to run about a grand...

[turtle420]

Somebody on these boards recently posted a formula that, I think gives a pretty good ballpark figure... I can't take credit (forgot where I read it...) but...

4 CFM/10 W
40CFM/100W
40CFM for every 100watts

What do you guys think?

[latewood]

I don't know...I will check and see if the formula is in the indoor bible...or 5 easy gardens...You guys should really look into getting these books, too!; I find they contain a wealth of info...I'll check.lw

[BukDatAss]

Damn it I never knew those things took so much wattage... There goes the electric bill again

[turtle420]

Damn it I never knew those things took so much wattage... There goes the electric bill again
CLARIFICATION:::
Buk,

Those 40 CFM / 100 watts...

Those aren't 100watts to generate those 40 CFMs... no no no...

It reads::: 40 CFM needed, for every 100 watts of cooled lights.

So, if you have 200 watts of lights, you need 40*2=80 CFM to cool those lights...

In my setup, I'll have 1000W... so I'll need around 400CFM to cool the cool tubel... yikes!

LateWood::: Yes, I need to get books ASAP... it's just that,... my lazy ass... ;)

[BukDatAss]

O K:dance: thats cool to know... Hey turtle do you think that light dimmer thing will work, thats a good ass Idea, if it does I would get the 465CFM;)

Damn but if I did the math right all I need is 160CFM for a 400w :) thats good. Damn Good Info Turtle:thumbsup:

[Clever Swine]

Ill get back to you lot on the 105 cfm/400w cool tube situation tell you all how it goes. is it possible to mount 2 fans in the same line or does this cause problems?
cheers

[Soon2bStoned]

im running a 1000hps with the bake a round cool tube set up with a dayton 465cfm and it is still very warm.....smaller room about 5x9 but i know i dont think the 465 cfm is even enough yet....thinking on adding others to it...just so u know my side