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Offlinepong
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Registered: 05/01/08
Posts: 548
Last seen: 6 years, 9 months
what kind of ventilation do i need?!?!
    #141775 - 11/06/08 05:46 PM (8 years, 28 days ago)

i need to build a grow closet. 

i am thinking that my grow closet will not have volume more than 75 cubic feet

will a system of ventilation built from these parts be sufficient?

this means that i will need at least 250cfm of airflow.

is this system too much or just right?

http://www.htgsupply.com/viewproduct.asp?productID=52609



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MARIJUANNNANNANNNANNNANNNANNANNANNNNNANANANAAAAAAAAA!!!!

MY GROW


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Offlinelopan
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Registered: 09/24/08
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Re: what kind of ventilation do i need?!?! [Re: pong]
    #141855 - 11/06/08 09:47 PM (8 years, 27 days ago)

My understanding is that, you should replace the air in the room (at least?) every five minutes.  That being said, in a 75cf room, you'd only need a fan capable of 15cfm?

So, that system should be plenty sufficient.


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Offlinepong
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Re: what kind of ventilation do i need?!?! [Re: lopan]
    #141966 - 11/07/08 12:54 AM (8 years, 27 days ago)

my understanding is that if you are in a small room you need to replace faster.  at least 3 times per minute

i am going to be in a small place with hid lighting.


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Offlinepong
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Re: what kind of ventilation do i need?!?! [Re: pong]
    #144279 - 11/13/08 02:56 AM (8 years, 21 days ago)

bump!!!!


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MARIJUANNNANNANNNANNNANNNANNANNANNNNNANANANAAAAAAAAA!!!!

MY GROW


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InvisibleDr. Penguin
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Registered: 05/19/08
Posts: 1,036
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Re: what kind of ventilation do i need?!?! [Re: pong]
    #144304 - 11/13/08 08:14 AM (8 years, 21 days ago)

Small spaces heat up more quickly thus need to be exchanged faster. I use a 170cfm inline for about the same cubic foot space and a 400w hid. So the parts you have listed should be fine for a 250w. That said, if you go this route, consider buying or building a fan speed controller. If noise is an issue, they can be a big help.


--------------------
* My Cab
* How to Build a Grow Tent
* Fan Speed Control 101
* Easy Butane Extraction

Not responsible for advice not taken.


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Offlinepong
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Registered: 05/01/08
Posts: 548
Last seen: 6 years, 9 months
Re: what kind of ventilation do i need?!?! [Re: Dr. Penguin]
    #144394 - 11/13/08 06:12 PM (8 years, 21 days ago)

is that 170 cfm putting air through a filter?

so i am planning on using 400w hid

and i have a similar room size

so i should get a 170 cfm fan?

does this one look good?

whats the consensus on these?


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MARIJUANNNANNANNNANNNANNNANNANNANNNNNANANANAAAAAAAAA!!!!

MY GROW


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Offlinepong
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Re: what kind of ventilation do i need?!?! [Re: pong]
    #144399 - 11/13/08 06:31 PM (8 years, 21 days ago)

oh and will the fan above be good for this

Max cfm: 200/350m³h
  @ 0.1 sec contact time
Recommended Min Airflow: 100 cfm
Prefilter: Yes
Flange: 6 & 8"
Dimensions: (with pre-filter)
·Outside Diameter: 305mm/12"
·Height: 330mm/13"
·Total Weight: 11.5kg/25.3lbs.
·Carbon Weight: 7.5kg/16.5lbs.
·Carbon Bed Depth: 50mm/2"
Max Operating Temp: 80ºC
Pressure drop at max cfm: 180pa/. 75wg


and this


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MARIJUANNNANNANNNANNNANNNANNANNANNNNNANANANAAAAAAAAA!!!!

MY GROW


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InvisibleStonethM
D.I.L.L.I.G.A.F.
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Registered: 10/06/08
Posts: 24,069
Loc: No where ville, USA Flag
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Re: what kind of ventilation do i need?!?! [Re: pong]
    #144488 - 11/13/08 09:20 PM (8 years, 20 days ago)

It all sounds good I personally have worked with less. But right is might.


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:getstoned:


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Offlinepong
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Re: what kind of ventilation do i need?!?! [Re: Stoneth]
    #144524 - 11/13/08 10:35 PM (8 years, 20 days ago)

so u think the inline duct fan of 250cfm the filter and the cooltube will work well together?  awesome!!!


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MARIJUANNNANNANNNANNNANNNANNANNANNNNNANANANAAAAAAAAA!!!!

MY GROW


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InvisibleDr. Penguin
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Registered: 05/19/08
Posts: 1,036
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Re: what kind of ventilation do i need?!?! [Re: pong]
    #144984 - 11/15/08 03:36 AM (8 years, 19 days ago)

Absolutely not! That fan you posted is a duct booster fan, not at all able to handle the static pressures required by a carbon scrubber. That fan will push 0-10cfm while under the load of the scrubber. The type of fan you want is an inline centrifugal fan, some suggested manufactures are: Vortex, Can Fan, and Econoline inline fans. You can also use squirrel cage blowers but they are harder to attach to ducting properly. These fans, while a bit more expensive, will save you a world of hurt in the long run.


--------------------
* My Cab
* How to Build a Grow Tent
* Fan Speed Control 101
* Easy Butane Extraction

Not responsible for advice not taken.


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Offlinepong
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Registered: 05/01/08
Posts: 548
Last seen: 6 years, 9 months
Re: what kind of ventilation do i need?!?! [Re: Dr. Penguin]
    #145156 - 11/15/08 05:58 PM (8 years, 19 days ago)

ok so can fan it is.

and a can filter too!


hella bils though.  but weed is gold so w/evs


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MARIJUANNNANNANNNANNNANNNANNANNANNNNNANANANAAAAAAAAA!!!!

MY GROW


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