Noob's guide to growroom set-up : a work in progress

[kutchc]

Thankyou Rhizome for doing this.. It is very informative and have learned alot so far.

If I do start a grow room will definitely use this thread as a guide! :thumbsup:

[el chupanebre]

read article in one breath. Thanks for the help...after searching it was the answer I was looking for.

[el chupanebre]

Using a dedicated system to cool your lights, would one simply leave out the light multiplier in the below equation to figure out the exhaust fan size?

We have a 4x4x6 room. Our total duct length is 13'. We're using a filter. Our math now looks like-

4x4x6 room= 96 CF. Divided by 4 minutes is 24 CFM required.
24 CFM + 130% ( 10%x13')= 55.2 CFM ( I'm gonna round to whole CFM, to try to minimize decimal over-runs)

(55CFMx1.5)x1.5= 124 CFM â?? to allow for our two 90 degree bends.

124 CFMx1.3 ( to allow for air velocity lost to the filter) = 161 CFM.

So we're looking at a 161 CFM fan.

But wait- we haven't even thought about how our light's going to effect this. We could go off into a discussion of determining system effeciency by measuring intake and exhaust temperatures so that we could calc differential temperatures, but I don't know how to make the little â?? deltaâ?� symbol on my laptop keyboard, so I'm gonna skip that and assign yet another load factor...

For a 250HPS- multiply by .75
For a 400- multiply by 1
For a 600, multiply by 1.3
For a K, multiply by 1.6.

[el chupanebre]

sorry to multiple post.

to cool 2 600 watts in the supersun with the above dedicated system for the lights would one need just a booster fan or an inline fan such as a can fan?

I have been looking around for 70 cfm fans and am unable to find any at this point. let me know.

[rhizome]

Using a dedicated system to cool your lights, would one simply leave out the light multiplier in the below equation to figure out the exhaust fan size?

Yep, that'd work.

Inline cooling 2 600's, I'd be looking @ a six inch inline.

[Opie Yutts]

I'm cooling one 600 with a 4" fan and ducts, and it's just not quite enough. Switching to 6" soon, along with re-routing ducts so there are less bends (a big factor). Also I find that the only way to get a 600 nice and close to the plants is to have dedicated light ventilation. And you need it if you are running CO2. If I could only give one bit of advice it would be to not skimp on ventilation. For HID, you really need to spend as much on venting as lighting.

Nice write-up rhizome.

[allrollsin21]

Rhizome that is some thorough learned you making me. Your efforts are so very appreciated. I am going to be taking my second stab at setting up a room in the upcoming months and will use this information, or at least what i understood(doh).
I was trying to cool 6 600W with a 10 inch canmax. With ducting that looked like a yankee stadium pretzel. not sure it was really doing the job (another doh)

[SouthernGuerilla]

Great information!

Gotta love growing outdoors Most everything is free cept the labor.

What about incorporating parent room(s) inside your work area. Like for mother and father plants. Start up budget required = ? Best sources for economical(energystar type stuff) equipment = ?

What kind of increase in the power bill should someone expect?

Lets say for a daily smoker or a medical user.

[stinkyattic]

This is a permalink to an instruction for calculating your power bill from a grow:
http://boards.cannabis.com/basic-gro...ml#post1885957

Combine that with the information Rhizome gave on the first page, referring to 'three Marley types', and you have yourself a figure.

[jordas]

rhizome . . . great information...thanks!