1blazeking
Member
Here is what I'm thinking for ventilation etc
Help me out designing my 2x2 or 3x3 grow room please
- Thread starter deephouser
- Start date
deephouser
Well-Known Member
That seems like a solid design - but your plants look pretty sickly. All the leaves have fallen off.
RetiredMatthebrute
Well-Known Member
RetiredMatthebrute
Well-Known Member
also if you look at my room the fan circulating fan is higher...the idea is to keep fresh air moving over the leaves which supplies them with max amount of C02 available.
1blazeking
Member
Ahh okay I gotcha... I guess with what I have designed the C02 coming in from the negative pressure would be going straight into the exhaust Lol. Just received the 400 watter today so next step is to create the box ..thinking 2x4x6 using 2x2's. I'll be making a thread soon. One question though, will I be able to get away with a fan booster from home depot for using just a 400 watter? I know I won't in summer with high temps but maybe now I dont know. Kinda low on budget money after all this buying. I really want that 6" fan/carbon filter combo from HTG though!
thanks for the help and nice grow room dude
RetiredMatthebrute
Well-Known Member
i bought one of them fans from home depot and returned it the next day they are junk and dont push any air at all. if you can get a nice inline fan if not amazon.com has some nice booster fans for the same price as the home depot model and push 3x the air. i use a booster fan for my 1000w and my room stays good.
mattoak
Well-Known Member
Negative pressure will prevent air from inside getting out through the intake area...as long as it is reasonably sized. It will work just as well as an intake fan. However, you actually don't want too much negative pressure, depending on your opening shape/size, because you run the risk of turbulence at the opening actually letting some air from inside leak out every once in a while. You want a nice and slow laminar flow of air through your intake, and slight negative pressure. The flow rate will govern the intake/exhaust area.
So after the fluid flow part..
Don't plants actually intake air from the bottom of the leaves?
I have a mylar tent, and I just zip it almost to the very bottom, and have a little opening at the bottom, with my fans (2 CPU fans, one DC, one AC, with another AC about to be added) up top exhausting out the top. There is definitely a good amount of negative pressure when I close it all the way up, and at the intake size I have there is a little negative pressure but not too much. you can definitely feel the air flowing out the exhaust. The key to using CPU fans that don't have a lot of pressure is straight, smooth tubing with as few turns in it as possible. Every rough part or bend will increase pressure, which those fans suck at pushing air against. But if you give them some nice straight shots, they will pump air. Most are around 100 cfm, so 2 or 3 of them and you have some very quiet, cheap, fans.
So after the fluid flow part..
Don't plants actually intake air from the bottom of the leaves?
I have a mylar tent, and I just zip it almost to the very bottom, and have a little opening at the bottom, with my fans (2 CPU fans, one DC, one AC, with another AC about to be added) up top exhausting out the top. There is definitely a good amount of negative pressure when I close it all the way up, and at the intake size I have there is a little negative pressure but not too much. you can definitely feel the air flowing out the exhaust. The key to using CPU fans that don't have a lot of pressure is straight, smooth tubing with as few turns in it as possible. Every rough part or bend will increase pressure, which those fans suck at pushing air against. But if you give them some nice straight shots, they will pump air. Most are around 100 cfm, so 2 or 3 of them and you have some very quiet, cheap, fans.