Veteran guerrilla and outdoor grower - first time grow in a small space

[puffuup]

Im looking into a closet grow for seedlings/ clones for my summer activities and some indoor buds. I am germinating some seeds under three dual bulb 24" t-5 lights and thats all good.
Im about to order a light. I want the suns system 2 400w enclosed system. How much heat should I expect with no ventilation. I am going to ventilate but I am curious.
My ventilation plans include
-small celing vent fan on a switch
- ocilating fan
- roughly 100cfm in line fan on...
- 2x attached 4" ducts vented into attic crawl space
- glass to enclose the unit also

I am really finding that there isnt much good clear info on heat out put of these units.

I want to know how hot my 2'x4'x8'tall space will get with that light. and what my minimum needs will be. I know the in line fan will be louder than I really want. Id like to get by with just a ocilating fan and a celing can if I could.

Thanks all.

[XBRPete]

Greetings!!!

Welcome to GP!! Lots of folks to answer your questions, we love pics!!!

I am also a veteran 35 year outdoor grower doing the finishing touches on my first organic indoor... gonna be a happy holiday season with fresh meds!!

My opinion, and it is just, that from personal observation and reading is that you need to calculate the square footage and that comes to 8.

You want coverage of 55,000 lumens...check around for calculation oh the HID sub-forum... great information!

A single 400 HID should do wonders, you might run that 4 inch duct from the attic through the hood and run a cool tube.

My area is 25 plus or minus s.f. and I am running a single 400 HPS without a cool tube. Outside 4 inch air intake and 4 inch carbon filtered exaust used in my house to supplement heat ( I live in a cold climate )

The room maintains 83 degrees with ventilation on and will hit WAYHOT if not ventilated.

JMHO..Peace!

Pete

[SmokeToLive]

You need more than 100cfm. I'm not sure exactly the amount, but we have a chart around here somewhere. Im doing > 100cfm for my single 250w.

Look for a nice squirrel cage fan. They're not too expensive, and they come in the much higher CFMs you will need.

[howlin420]

great site ,folks and info

[Deb-HAS-grn]

Hi and Welcome To Green Passion!!!

[Itinkso]

hi there...welcome to GP!!!! you'll be ready in no time with all the info available here!!!

best of luck!!

[chuckd420]

[jangel]

Welcome to GreenPassion! If you look at the top of every page you will see buttons that say

GP User Menu GP Forum Menu GP Games Menu GP FAQ Menu Computer Maint GP Media Search Log Out

These have much info in them that will help you out. Under the GP FAQ you will find info on building your cupboard. It will also help you with calculating cfm, etc.

Keep reading and asking questions and we will do what we can to help.

Peace