1).Okay I have a question does it matter which end you are pulling the air from the hood from.? Like from the bulb end or the socket end.?

2). Does any one think that they lose light using theses hoods, Just dont look like the ends where your ducting gets attached to, seems like it don't light up theses sides of the cab that well.. Maybe it is just me be over cautious. Juust kinda looking for some thoughts from experiences or maybe info. u have

Cab. is 2x4x4
hood measures 24''wX20''L(with the ac ports adds 5 more inches in L)
400W bulb

~One~
~BudG~

__________________
I think there are plenty of good people in America, but there are also plenty of bad people in America and the bad ones are the ones who seem to have all the power and be in these positions to block things that you and I need. You and I have to preserve the right to do what is necessary to bring an end to that situation, I dont advocate violence,but at the same time I am not against using violence in self-defense. I don't even call it violence when it's self-defense, I call it intelligence.

I've had two of them, and like them ... you do lose a tiny bit of lumens, when going thru the tempered glass, but the safety concerns greatly outweigh the slight loss ... the fans tend to work better while sucking the hot air out, but, be sure your fan can handle running hot, all the time ... I use a Home Depot furnace duct fan on mine, to extract the heat ... watch your eyes around high-pressure lamps, etc., too ... be safe

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" when in doubt, imitate Nature "

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IR thanx for stopping by, Could you tell me your space that you were using. An do you feel that you got the same amount of light at the length ends.? Do you connect your fan ducting to the end with the socket for the bulb, or the bulb tip end.? I know you want it to pull the air. Hd furnace fans work real good got 1.

O ya Ir do you think its good to use the glass wit a Mh.?

~One~
~BudG~

__________________
I think there are plenty of good people in America, but there are also plenty of bad people in America and the bad ones are the ones who seem to have all the power and be in these positions to block things that you and I need. You and I have to preserve the right to do what is necessary to bring an end to that situation, I dont advocate violence,but at the same time I am not against using violence in self-defense. I don't even call it violence when it's self-defense, I call it intelligence.

1. Whatever is safest and easiest to work around. You don't want shit hanging all over the place. I would think that putting the fan before the heat source would perhaps make the fan last longer, but if using a fan rated for the heat it doesn't matter. Why not one on each end, lol?

2. There are planty of things to worry about with growing cannabis...a few lost lumens from an HID throwing-out over 50,000 of 'em isn't tops among the important issues. After all...it is a Sun System to begin with. (cheap and effective, but not the industries' finest)

Use the safety glass, or wear UV sunglasses and long sleeved shirts. (limit exposure)

I used to use my 400w MH in my 4 x 2 x 7' tall closet with no issues, once you figure-out ventilation and light leaks.

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Hey thanx Rusty for coming threw. Just wanted to hear if someone had used a mh in this size space b4 an work for them. I was thinking of 2 fans, but money a lil low as of now so gotta make do wit whats I got.
Thanx again to ya Rusty, Ir


~One~
~BudG~

__________________
I think there are plenty of good people in America, but there are also plenty of bad people in America and the bad ones are the ones who seem to have all the power and be in these positions to block things that you and I need. You and I have to preserve the right to do what is necessary to bring an end to that situation, I dont advocate violence,but at the same time I am not against using violence in self-defense. I don't even call it violence when it's self-defense, I call it intelligence.

hydrofarm in the instruction manual recommends sucking the air from the far end from the socket. This means fresher air will cool bulb side first. As in my crude diagram. <= air flow direction
fan<<<<<(Ballast.___Socket side)<<<<

Hey I use the same sun system in my grow log. I think i have a 6'' air cooled version and I dig it. I am expanding my grow box to help make more room for the exhaust and scrubber.. Overall tho there nice.

__________________
Please don't take what I write serious, because I don't barely even listen to what the voices in my head say much less believe what they make me write online to get attention.
http://boards.cannabis.com/grow-log/...ml#post2032608

http://boards.cannabis.com/indoor-gr...ml#post1969718

Whats up man.?< Ya i know i told ya B4 I have the same ac hood you got. Was trying to figure out which way/end to pull the air from. What size fan are you using on yours.? I was wondering if I could just run my line to pull fresh air in threw the hood put a Y adapter on the other end run ducting to fan.? Then put a reducer on the other end of Y adapter to make it 4in. So I can pull heat out my box to while pulling in fresh cool air on the bulb at the same time.? Does this make any since to ya.? What do you think, I am trying to figure this out asap. Thanx.... Can't wait to see what you get in the mix with next frosted..

~One~
~BudG~

__________________
I think there are plenty of good people in America, but there are also plenty of bad people in America and the bad ones are the ones who seem to have all the power and be in these positions to block things that you and I need. You and I have to preserve the right to do what is necessary to bring an end to that situation, I dont advocate violence,but at the same time I am not against using violence in self-defense. I don't even call it violence when it's self-defense, I call it intelligence.

~One~
~BudG~

__________________
I think there are plenty of good people in America, but there are also plenty of bad people in America and the bad ones are the ones who seem to have all the power and be in these positions to block things that you and I need. You and I have to preserve the right to do what is necessary to bring an end to that situation, I dont advocate violence,but at the same time I am not against using violence in self-defense. I don't even call it violence when it's self-defense, I call it intelligence.

Hey, after reading what you posted I tried to figure out what you would gain and I can't see it working out. First you will always want less splitting and bending and cornering when you are working with ducting and fans. Check out my new log there are some shots of the inside of my box that may help ya. Also Bigtopfin has a grow log about his two TW plants and he goes over some different setups as well. I am basically leaving one end open and then on the other end I am using a duct fan to push hot air out of the box and thru a carbon filter. My goal was to get a somewhat neg air exchange going where the fan exhausting the air out was also pulling the fresh air into the box with the help of a small 4'' duct booster fan. That will work for me only if I get a better cfm rated duct fan the boosters are just not enough. Lets see some pics of what you are working with and on...that would help.

__________________
Please don't take what I write serious, because I don't barely even listen to what the voices in my head say much less believe what they make me write online to get attention.
http://boards.cannabis.com/grow-log/...ml#post2032608

http://boards.cannabis.com/indoor-gr...ml#post1969718

I don't have all the stuff I need yet. Trying to get it all re figured out before I go drop the lil money I have left on more stuff.

<<<<scrubber<<<<Fan<<<< duct Y adapter<<<<<<<hood<<<<Air fro out the box to cool light down more. The Y adapter would be set so it pulls air threw the Ac hood and the box. The part not attached to the fan/hood ends would have a reducer on it to limit air suction. An I still could have a passive system air exchange By pulling air threw my hood to cool the bulb and out the box.? Make any sense.? I thought with Ac hoods the object was to pull cooler air over the bulb an straight out the box, Thus letting you get the light closer to the top of the plant canopy. Which work better for deeper penetration, Maybe I just mistook something. I will try to get pics when I get it all worked out and together tho Frosted.


~One~
~BudG~

__________________
I think there are plenty of good people in America, but there are also plenty of bad people in America and the bad ones are the ones who seem to have all the power and be in these positions to block things that you and I need. You and I have to preserve the right to do what is necessary to bring an end to that situation, I dont advocate violence,but at the same time I am not against using violence in self-defense. I don't even call it violence when it's self-defense, I call it intelligence.

On the site of Fan maker I have (Suncourt), It say the max boosted cfm = 500 and free air cfm = 210. It is a Inductor inline fan and on the box tho it say 500 cfm.? So I am a little confused as to what boosted and free air Cfm means. If anyone can chime in.?

Thanx


~One~
~BudG~

__________________
I think there are plenty of good people in America, but there are also plenty of bad people in America and the bad ones are the ones who seem to have all the power and be in these positions to block things that you and I need. You and I have to preserve the right to do what is necessary to bring an end to that situation, I dont advocate violence,but at the same time I am not against using violence in self-defense. I don't even call it violence when it's self-defense, I call it intelligence.

Kbg, Damn I have seen that same thing and wondered, but I am guessing it means it has a max of total cfm that it can safely even have inline like from the furnace or source connected to it...not sure tho and I have the munches... I bought a Ecoplus Premium Inline fan with a 440cfm at max, and then I got the speed control for it and I am glad I did it is damn loud and probably more then I needed, kinda rethinking it before using it.. Doesn't hurt to do recon does it...

__________________
Please don't take what I write serious, because I don't barely even listen to what the voices in my head say much less believe what they make me write online to get attention.
http://boards.cannabis.com/grow-log/...ml#post2032608

http://boards.cannabis.com/indoor-gr...ml#post1969718

No I believe recon is what must be done, In order to get better an dialed in. Will See what happens tho, I'll figure something out i guess. But it sounds like you did the right thing in my opinion, If noise is not a issue your okay since you can always turn it down if someone comes over. No since in trying to cheap out the ventilation, And you may upgrade ya lights lots of possibilities.


~One~
~BudG~

__________________
I think there are plenty of good people in America, but there are also plenty of bad people in America and the bad ones are the ones who seem to have all the power and be in these positions to block things that you and I need. You and I have to preserve the right to do what is necessary to bring an end to that situation, I dont advocate violence,but at the same time I am not against using violence in self-defense. I don't even call it violence when it's self-defense, I call it intelligence.

Yeah I am happy with upsizing on the fan, I did buy the speed control which should be included you would think for around 200 bucks total.

Did you decide yet on some things yet or make the leap and buy a good fan?

__________________
Please don't take what I write serious, because I don't barely even listen to what the voices in my head say much less believe what they make me write online to get attention.
http://boards.cannabis.com/grow-log/...ml#post2032608

http://boards.cannabis.com/indoor-gr...ml#post1969718

Yo Frosted I think I am gonna try to work with the stuff I have right now, As money is a little tight right now. Ill do some upgrading when I get the chance. As soon as I get this stuff situated and sorted out ill get some shot up....Hopefully Ill keep you informed on what happens an how it comes along.

~One~
~BudG~

__________________
I think there are plenty of good people in America, but there are also plenty of bad people in America and the bad ones are the ones who seem to have all the power and be in these positions to block things that you and I need. You and I have to preserve the right to do what is necessary to bring an end to that situation, I dont advocate violence,but at the same time I am not against using violence in self-defense. I don't even call it violence when it's self-defense, I call it intelligence.

simple answer.

Pull the air dont push it. Suck from the end of the bulb not the socket. easier to work with. Pulling moves more air. When youy push the air threw the hood you end up with dead spots in the hood. corners if you have them that the air pools in. You loose air flow. suck dont push.

Yo thank for the input, I know I want to have the fan pulling air not pushin it. I was more interested on my passive airflow and ac cooling with 1 fan. I am just gonna figure this out and work with what I got been pretty busy lately so have not had the time to think and get situated.



~One~
~BudG~

__________________
I think there are plenty of good people in America, but there are also plenty of bad people in America and the bad ones are the ones who seem to have all the power and be in these positions to block things that you and I need. You and I have to preserve the right to do what is necessary to bring an end to that situation, I dont advocate violence,but at the same time I am not against using violence in self-defense. I don't even call it violence when it's self-defense, I call it intelligence.

Hey, KBG. Just read through the thread. While the "Y" with damper will give some added control over venting the space/light, IME it's unnecessary. If you're moving a decent volume of air, the difference in temperature between the two separate intakes will only be 3 or 4 degrees *at most*. The difference will be negligible for the purpose of cooling the bulb. Drawing your air from a single opening will simplify things, and be just as effective.

Basically what Frosted said, earlier in the thread. Just thought I'd toss in my $.02.

Good Luck! Half the fun of this hobby is figuring stuff out!