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 pftek
Stranger
Registered: 09/18/09
Posts: 137
Last seen: 14 years, 10 months
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 how much fan power do I need? for 600 watt HPS? 
#330725 - 12/13/09 02:21 PM (15 years, 12 days ago) |
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looking to go cheap. suck out smell and heat.
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81renaissance
Coachella '13 KKOTY
Registered: 04/20/08
Posts: 4,182
Loc: State of Mind 
Last seen: 10 months, 3 days
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Re: how much fan power do I need? for 600 watt HPS? [Re: pftek]
#330726 - 12/13/09 02:23 PM (15 years, 12 days ago) |
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NEI
Cubic feet of growspace?
Ambient temps?
Do you have a carbon filter?
--------------------
"So it goes."
-Kurt Vonnegut
BlueBerry_Swisher said:I want French fries. No, I want a penis French. Thank you. I'm so excited. I can not contain myself. Now I eat chocolate. It is so good. I'm trying to rub it all over myself. And then lick. Now I need a hot shower. The end.
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pftek
Stranger
Registered: 09/18/09
Posts: 137
Last seen: 14 years, 10 months
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Re: how much fan power do I need? for 600 watt HPS? [Re: 81renaissance]
#330728 - 12/13/09 02:27 PM (15 years, 12 days ago) |
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Quote:
81renaissance said:
NEI
Cubic feet of growspace?
Ambient temps?
Do you have a carbon filter?
6x4 feet. not sure how high yet. maybe 7 feet.
60-70 degrees. i can turn off the heater. and get it to 60.
not yet but will make a diy one.
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81renaissance
Coachella '13 KKOTY
Registered: 04/20/08
Posts: 4,182
Loc: State of Mind
Last seen: 10 months, 3 days
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Re: how much fan power do I need? for 600 watt HPS? [Re: pftek]
#330732 - 12/13/09 02:30 PM (15 years, 12 days ago) |
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Ok so 6x4x7=168 cubic feet, so I'd recommend a fan with at least 376 cfm so that you can exchange air at a rate of twice per minute.
If your ambient temp is in the 60-70 range, that amount of air exchange should control the temps in your room. Make sure you have an oscillating fan to move the air around as well.
--------------------
"So it goes."
-Kurt Vonnegut
BlueBerry_Swisher said:I want French fries. No, I want a penis French. Thank you. I'm so excited. I can not contain myself. Now I eat chocolate. It is so good. I'm trying to rub it all over myself. And then lick. Now I need a hot shower. The end.
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 coda
Registered: 04/20/08
Posts: 4,736
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Re: how much fan power do I need? for 600 watt HPS? [Re: pftek]
#330733 - 12/13/09 02:31 PM (15 years, 12 days ago) |
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temps should be in the 76-78 degree range for optimal growth
6x7x7 = 294 CF
So at minimum you would need a 300 cfm fan to change the air once a minute in your cab.
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MFDoom666: sobriety kills my buzz every time.
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81renaissance
Coachella '13 KKOTY
Registered: 04/20/08
Posts: 4,182
Loc: State of Mind
Last seen: 10 months, 3 days
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Re: how much fan power do I need? for 600 watt HPS? [Re: coda]
#330736 - 12/13/09 02:37 PM (15 years, 12 days ago) |
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Quote:
6x4 feet. not sure how high yet. maybe 7 feet.
So this is the 168 CF I got. Just a minor change.
PF: Are you using HID lighting?
--------------------
"So it goes."
-Kurt Vonnegut
BlueBerry_Swisher said:I want French fries. No, I want a penis French. Thank you. I'm so excited. I can not contain myself. Now I eat chocolate. It is so good. I'm trying to rub it all over myself. And then lick. Now I need a hot shower. The end.
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pftek
Stranger
Registered: 09/18/09
Posts: 137
Last seen: 14 years, 10 months
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Re: how much fan power do I need? for 600 watt HPS? [Re: 81renaissance]
#330743 - 12/13/09 02:50 PM (15 years, 12 days ago) |
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Quote:
81renaissance said:
Quote:
6x4 feet. not sure how high yet. maybe 7 feet.
So this is the 168 CF I got. Just a minor change.
PF: Are you using HID lighting?
yeah i'm thinking of getting a 600 watt HID system MH/HPS. most likely something like this:
http://cgi.ebay.com/600-WATT-HPS-DIGITAL-GROW-LIGHT-w-XL-HOOD-600w-BALLAST_W0QQitemZ180443381037QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item2a03437d2d
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81renaissance
Coachella '13 KKOTY
Registered: 04/20/08
Posts: 4,182
Loc: State of Mind
Last seen: 10 months, 3 days
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Re: how much fan power do I need? for 600 watt HPS? [Re: pftek]
#330747 - 12/13/09 02:56 PM (15 years, 12 days ago) |
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Okay, but in a 6x4 room, you'll need two of those setups if you want to get 50 watts/ft^2. You're only providing half of that...not enough even to cover the growing area.
--------------------
"So it goes."
-Kurt Vonnegut
BlueBerry_Swisher said:I want French fries. No, I want a penis French. Thank you. I'm so excited. I can not contain myself. Now I eat chocolate. It is so good. I'm trying to rub it all over myself. And then lick. Now I need a hot shower. The end.
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pftek
Stranger
Registered: 09/18/09
Posts: 137
Last seen: 14 years, 10 months
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Re: how much fan power do I need? for 600 watt HPS? [Re: 81renaissance]
#330751 - 12/13/09 03:00 PM (15 years, 12 days ago) |
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it's only 9 plants...
i'm building 3 of these:
http://www.stealthhydroponics.com/product.php?xProd=16&xSec=60
still not enough?
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81renaissance
Coachella '13 KKOTY
Registered: 04/20/08
Posts: 4,182
Loc: State of Mind
Last seen: 10 months, 3 days
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Re: how much fan power do I need? for 600 watt HPS? [Re: pftek]
#330755 - 12/13/09 03:08 PM (15 years, 12 days ago) |
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 I know nothing about hydro, but as far as lighting is concerned, I know the rule of thumb is 50 watts/ft^2 and I never go below that.
Those tubs hold 6 plants each, so if you have three, that's 18 plants...are you modifying the design?
--------------------
"So it goes."
-Kurt Vonnegut
BlueBerry_Swisher said:I want French fries. No, I want a penis French. Thank you. I'm so excited. I can not contain myself. Now I eat chocolate. It is so good. I'm trying to rub it all over myself. And then lick. Now I need a hot shower. The end.
|
pftek
Stranger
Registered: 09/18/09
Posts: 137
Last seen: 14 years, 10 months
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Re: how much fan power do I need? for 600 watt HPS? [Re: 81renaissance]
#330764 - 12/13/09 03:19 PM (15 years, 12 days ago) |
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Quote:
81renaissance said:
I know nothing about hydro, but as far as lighting is concerned, I know the rule of thumb is 50 watts/ft^2 and I never go below that.
Those tubs hold 6 plants each, so if you have three, that's 18 plants...are you modifying the design?
i'm using seeds. i'm just assuming half of them are going to be male and i'll have to rip them out.
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81renaissance
Coachella '13 KKOTY
Registered: 04/20/08
Posts: 4,182
Loc: State of Mind
Last seen: 10 months, 3 days
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Re: how much fan power do I need? for 600 watt HPS? [Re: pftek]
#330769 - 12/13/09 03:23 PM (15 years, 12 days ago) |
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Don't assume.
Here's the long and short of it: 600 watts is adequate for 12 ft^2 maybe up to 16 if you want to push your luck.
Beyond that you'll see airy buds, and low yields, basically low quality herb.
If you can only get 1 600 watt setup, I recommend utilizing less space than 6x4.
This is only one grower's opinion, and in the end, they're your plants to grow as you please.
--------------------
"So it goes."
-Kurt Vonnegut
BlueBerry_Swisher said:I want French fries. No, I want a penis French. Thank you. I'm so excited. I can not contain myself. Now I eat chocolate. It is so good. I'm trying to rub it all over myself. And then lick. Now I need a hot shower. The end.
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pftek
Stranger
Registered: 09/18/09
Posts: 137
Last seen: 14 years, 10 months
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Re: how much fan power do I need? for 600 watt HPS? [Re: 81renaissance]
#330783 - 12/13/09 03:49 PM (15 years, 12 days ago) |
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Quote:
81renaissance said:
Don't assume.
Here's the long and short of it: 600 watts is adequate for 12 ft^2 maybe up to 16 if you want to push your luck.
Beyond that you'll see airy buds, and low yields, basically low quality herb.
If you can only get 1 600 watt setup, I recommend utilizing less space than 6x4.
This is only one grower's opinion, and in the end, they're your plants to grow as you please.
thanks. maybe i'll just build 2 of them. which would be 4 feet by 3.
6 plants.
Edited by pftek (12/13/09 03:50 PM)
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81renaissance
Coachella '13 KKOTY
Registered: 04/20/08
Posts: 4,182
Loc: State of Mind
Last seen: 10 months, 3 days
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Re: how much fan power do I need? for 600 watt HPS? [Re: pftek]
#330785 - 12/13/09 03:51 PM (15 years, 12 days ago) |
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or 7 or 8 or 10 or 12...
--------------------
"So it goes."
-Kurt Vonnegut
BlueBerry_Swisher said:I want French fries. No, I want a penis French. Thank you. I'm so excited. I can not contain myself. Now I eat chocolate. It is so good. I'm trying to rub it all over myself. And then lick. Now I need a hot shower. The end.
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