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View Full Version : Need your help and advice on vent design


cture
07-18-2007, 09:28 PM
I have a room 14.7'x7.54'x8.26' in feet or 4.37x2.3x2.5 in metres. You can see on the pic.
Iwant to design the vent path over this growroom. I have powerfull inline fan, but have no idea how to line ventilation ducts to maintain air flow through plants and hps cooling .
Please feel free to draw on the pic.
Thankyou
SpaceNeedle
07-19-2007, 03:47 AM
Well, you're not saying where you are getting your fresh air from, nor where it needs to exhaust.
Ventilation is pretty simple, it means moving air, you say you have an inline fan, how many CFM? calculate the cubic feet of your room and divide that by the CFM of your fan, and you have an idea how many air exchanges you are making. If you are using a passive exhaust (that means, just an exit, no blower fan), then it should be at least 3 times as large as the intake.
cture
07-20-2007, 07:36 PM
My exhaust fan changes air in the whole room in 5 minutes. The way to blow and suck air out of this room is through doors. I want to know how air flow should be organized in this room in order to place air ducts.
Tomthehippie
07-21-2007, 09:30 AM
suck hot air out the top as heat rises bring cool air in from the bottom. :)
SpaceNeedle
07-21-2007, 02:24 PM
tomthehippie is right, and depending if you're using 1000+ watts of HPS or MH, I doubt your fan is going to be sufficient. My room exchanges air every minute, and it has heat build-up problems. Without air conditioning it's tough to keep the girls cool enough when the outsid temperature hits over 80F, and each 1000W light produces 3000 btu of heat.
By the way, I was in the heating/airconditioning biz for 10 yrs.
PharmaCan
07-21-2007, 03:53 PM
My exhaust fan changes air in the whole room in 5 minutes. The way to blow and suck air out of this room is through doors. I want to know how air flow should be organized in this room in order to place air ducts.

If I understand your question, it is irrelevant - not the question, the vent placement. The venting is not for moving your air in the room. For that you have circulating fans in the room blowing the air around.

Since you want to exhaust hot air, the exhaust vent should be up high and, obviously, you wouldn't want the intake and exhaust right next to each other.

Other than that, listen to SpaceNeedle. Heating & A/C guys are scarce around here.

Good luck! :thumbsup:

PC :smokin: