Heat CFM CUFT problem

[benamucc]

Hope this got the math kidz... this one got me...

I have built what i would like to be my veg box, and it's 22.534cuft. I have a 3 inch supply with 68degree air from my crawl space, and a 250 cfm fan PULLING air thru the box. It's 89 inside the box, and exhausting air around 84 :holysheep: into the gr.

I put a small box fan in the window, trying to exhaust the air from the gr under the 1 1/2 inch gap under the door. Doing air direction tests with my lighter confirms that I'm getting the flow I want. I'm just obviously not getting enough.

The box has 14 x 32W mixed softwhite, and coolwhite CFLS and 4 x 40W T-12's. The only way I can get it into the 70's is with the front wide open and the gr door open. Problem is I have some guests coming tomorrow night, and this needs to be resolved on the pronto!!

HHHHEEEELLLLPPPPP!!!!!

 

[THE BROTHER'S GRUNT]

Sounds like your gonna need another fan in there to pull that hot air out.

 

[the widowmaker]

what are the temps with the door closed

 

[smokybear]

TBG said it. You need another fan inside your box. Get another exhaust fan and that should help immensely. Good luck and keep us posted on what you finally decide to do. Take care.

 

[trillions of atoms]

yup ...you need more fan power pulling ait IN therefore pushing more sir OUT. hands down.