250w HPS closet planning help needed

S

Simplicity

Member
Okay so, HI!

The size of my closet is:
6ft tall
1.5ft deep
2.5ft wide

Originally i was thinking i could put a 400w there but i realized that it's nearly impossible to do so, so im back at 250w HPS. My main question is - Is this place suitable for a 250w HPS? My second question is what cfm rate fans i am looking for? 1 In and 1 Out but what cfm? will pc fans do it?? Is there a way i can calculate the cfm needed?
Thanks in advice :)
 
Stonetech

Stonetech

Well-Known Member
Hey man how's it goin? I hav e recently built a 250w cab that is 32"x20"x 60". Sound kind a familiar? I'd like to share what i've discovered so far about the ventilation. I'm still gearing up to take it for a spin but i've gone through a lot of testing and here's what I've come up with. I'm using a 250w lumatek dial a watt remote ballast so i can run mh and hps cool tubed in 150w,175w, or 250w, depending on the situation. I've got a 240cfm fan for exhausting the cab via cool tube and a 80 cfm for intake. the exhaust goes into a cloning/seedling chamber above and is then sucked through a 210 cfm filter with another 240cfm fan. My temps peak at about 25C. Which in my mind is pretty fuckin good. I also tried the 250w bare bulb with pretty much the same outcome. Since I'm growing vert, I opted for the cooltube for the added protection (the buds can grow right up against the glass without burning). So to make a long story short I think you could easily get away with a 200cfm exhaust and 80cfm intake. Here's a pick of the cab.
 

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S

Simplicity

Member
Stonetech said:
Hey man how's it goin? I hav e recently built a 250w cab that is 32"x20"x 60". Sound kind a familiar? I'd like to share what i've discovered so far about the ventilation. I'm still gearing up to take it for a spin but i've gone through a lot of testing and here's what I've come up with. I'm using a 250w lumatek dial a watt remote ballast so i can run mh and hps cool tubed in 150w,175w, or 250w, depending on the situation. I've got a 240cfm fan for exhausting the cab via cool tube and a 80 cfm for intake. the exhaust goes into a cloning/seedling chamber above and is then sucked through a 210 cfm filter with another 240cfm fan. My temps peak at about 25C. Which in my mind is pretty fuckin good. I also tried the 250w bare bulb with pretty much the same outcome. Since I'm growing vert, I opted for the cooltube for the added protection (the buds can grow right up against the glass without burning). So to make a long story short I think you could easily get away with a 200cfm exhaust and 80cfm intake. Here's a pick of the cab.
Click to expand...
Awesome post thanks man. Inch wise my cab is 74"x19"x32" Anyways can you tell me how loud the 240cfm fan is? Because the closet im growing in will be in my room and i dislike noises obv :D
Oh and btw you kinda have my dream setup ^^
 
zem

zem

Well-Known Member
it is suitable for 250w.
you need to exchange air 2-3x per minute. calculate your cubic feet multiply by 3. you can get fan controler set it on low or medium will make fan much more silent. you dont need intake fan, just holes for passive intake and exhaust fan does the rest. actually if you have a smaller intake fan than exhaust, you might diminish aeration than if you only had exhaust with beg enough intake hole
 
S

Simplicity

Member
zem said:
it is suitable for 250w.
you need to exchange air 2-3x per minute. calculate your cubic feet multiply by 3. you can get fan controler set it on low or medium will make fan much more silent. you dont need intake fan, just holes for passive intake and exhaust fan does the rest. actually if you have a smaller intake fan than exhaust, you might diminish aeration than if you only had exhaust with beg enough intake hole
Click to expand...
So my cubic feet is 6x1.5x2.5= 22.5x3=67.5 is 67.5CFM needed to exchange the air in the closet once, or am i mistaken? Can you help me out abit mr zem?
 
zem

zem

Well-Known Member
thats right, 22.5 cubic feet 67.5 cfm exchanges 3x per minute. you could get the 240 cfm, more is usually better + fans lose venting power with ducts and curves. you could use fan controler on medium or low it will make almost no noise this way
 
ValleGrown

ValleGrown

Well-Known Member
Yes he more the better.
I have a cab that is 2w x 2d x 4t and I am running a pc fan that is rated at 253 cfm although I have some ducting. So it's needed. I am also running a 250 ballast is outside the cab. Temps range from 75-80 daytime 64 at night
 
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S

Simplicity

Member
ValleGrown said:
Yes he more the better.
I have a cab that is 2w x 2d x 4t and I am running a pc fan that is rated at 253 cfm although I have some ducting. So it's needed. I am also running a 250 ballast is outside the cab. Temps range from 75-80 daytime 64 at night
Click to expand...
Can you give me a link to your fan because i'm looking all day at bathroom fans :(
Fight club is a cool movie man :D
 
S

Simplicity

Member
ValleGrown said:
Hella man I got it off frozencpu
http://www.frozencpu.com/products/8147/fan-500/Delta_Mega_Fast_120mm_x_38mm_Fan_-_252_CFM_-_Bare_Lead_PFB1212UHE-F00.html?tl=g36c435s1109

Fight club changed my life bro... Like you wouldn't imagine. Watched that shit on acid. And I shot my own Tyler durden in the dome bro. (end of the movie)..... my eyes are open Tyler and blamo shoots himself in the fuckin face lol
Click to expand...
That's... weird! :D
Anyways i think your fan is extremely noisy? what do you think?
 
ValleGrown

ValleGrown

Well-Known Member
I must warn you though. It's a beast man. That fan is SO FUCKIN LOUD. Sounds like a jet engine lol starting up
 
zem

zem

Well-Known Member
ValleGrown said:
Yes he more the better.
I have a cab that is 2w x 2d x 4t and I am running a pc fan that is rated at 253 cfm although I have some ducting. So it's needed. I am also running a 250 ballast is outside the cab. Temps range from 75-80 daytime 64 at night
Click to expand...
thats exact. good post. describes exactly how i do it only with couple 400's. i shrink my box just to the right size so that i vent with a small 6" metallic fan ballasts outside no ducts at all. still no cooltube but it's just 4ft high it's like a big cooltube itself :)
 
ValleGrown

ValleGrown

Well-Known Member
If you do get it for any reason I would recommend a fan control to get that goldylox speed where it ain't whaling but still performing correctly. So yea I did dampen the noise slot with a card board box that has the attachment to my carbon filter. When the filter is on. Not so loud. But kinda still lol
 
ValleGrown

ValleGrown

Well-Known Member
zem said:
thats exact. good post. describes exactly how i do it only with couple 400's. i shrink my box just to the right size so that i vent with a small 6" metallic fan ballasts outside no ducts at all. still no cooltube but it's just 4ft high it's like a big cooltube itself :)
Click to expand...
For real man. Big ol cool tube
 
S

Simplicity

Member
Dimension (W / H / D) 200 x 200 x 30 mm
Speed (R.P.M.) 700 RPM
Air Flow (CFM) 110 CFM
Air pressure (mmH2O) 0.595 mm H2O
Noise 19 dBA
Bearing Type Sleeve Bearing
Fan Life Expectancy 30,000 Hours
Rated Voltage 12 VDC
Current (Ampere) 0.16 A (Max 0.28 A)
Power consumption 3.36 W
Weight 266 g
Connector 3 Pin
3 to 4 pin Adapter 1 pcs
LED Color Blue
Screws 4 pcs

This goona be good?
 
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