Just inherited a house with a good sized attic!

The attic is ver cool and has a very high exhaust vent. Luckily the people who designed it used very thin sheetrock for the roof (with large gaps between studs).

So, RIU, what do you think? Bathroom exhaust fan with a carbon filter at the top of my growroom is enough? If you had an easy access attic (I mean this is so easy I can use a box cutter to make my exhaust opening) what would you do?

well first off, you are one lucky fuck. Lol.

2nd off I would insulate the fuck out of the attic roof. use that soy spray shit or sray foam then some blue jean or foam pads. All that shit from the green planet. your ozone will make toxic shit off gas and lame for plants.

FLir!!!!!!!!!!!!!
even if no snow in area/ lol, cover that roof.


Then ne careful how you exhaust. I would not go through the roof if their is ever snow in your area. The flir will see all.
SO you gotta examine that. Personally I would exhaust into your house and use filters and uv ozone.

that is cool. i wish you can tell.

yeah you would not mind a vent in your house shooting warm air. not that bad. just say it is a heater that wont turn off to any randoms. or flick it off. all busts I read are from bad exhast ideas.

Yes the flir will detect the hot vented gases coming out of the top of the house. Like Dirt clean said vent it into the house.

dirt clean said:

well first off, you are one lucky fuck. Lol.

2nd off I would insulate the fuck out of the attic roof. use that soy spray shit or sray foam then some blue jean or foam pads. All that shit from the green planet. your ozone will make toxic shit off gas and lame for plants.

Then ne careful how you exhaust. I would not go through the roof if their is ever snow in your area. The flir will see all.
SO you gotta examine that. Personally I would exhaust into your house and use filters and uv ozone.

that is cool. i wish you can tell.

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Haha, I guess I'm extra lucky. There is no snow in my area and the attic is already heavily insulated. I can't exhaust into my house because I lack the money for coolin/ozone management. The attic doesn't have an actual exhaust system, its just a panel with gaps. Any other advice? +rep to you all

Also, the light at my newly obtained "grow house" will be a 400w in a 4x4x8 (lwh) room. If I can exhaust/intake this cheaply and you have ideas, please let me know.

Is there a chimney running through the attic?

man that is a fun one. I mean a little tough. unravel, can u wait save money the exahaust through a bathroom vent?

ozone will only run like 50 used or 160 new for a huge one. will clean whole attic. remmeber only use uv, corona discharge will kill.

really it is try and cut whole in house or really work on how to get reg temp air outa attic.

i recomend getting charcaol filter from bg hydro first. ozone is secondary and can be tricky.

I am sure you can come up with a solution not that expensive.

The house is very old and has no chimney. The attic temperature is very cold always (due to the fact that the AC leaks into it heavily) so that may help. As far as venting through the bathroom's exhaust? The house is so cheaply built that the bathroom exhaust goes directly into the attic via a 4" duct.

Any ideas? Will the 400w put off that much noticeable heat? Would pictures help?

[edit]
Also, I'm not trying to go crazy with this only because I'm growing for satisfaction and personal use. The MJ will never, ever leave my house. I have a way of keepin weed good for nearly a year, so, none will go to waste. I'd let you in on my secret, but it is heavily incriminating. Sorry!

400 watts is hardly going to produce any heat at all, really. An average large bathroom has 400 watts of light in it - that's what I have in mine - so if your attic is already cold from the AC, I'm guessing it won't raise the temperature in a well-insulated attic by more than a couple of degrees, at most. I'd be more concerned about hot spots on the roof, myself - areas where the heat radiated from a nearby light fixture will cause a small area of the roof to become much hotter than the rest of the roof. That's a dead giveaway to an infrared sensor that there's some small heat source in the attic. How far away from the ceiling will your light be?

amsterhamster said:

The attic is ver cool and has a very high exhaust vent. Luckily the people who designed it used very thin sheetrock for the roof (with large gaps between studs).

So, RIU, what do you think? Bathroom exhaust fan with a carbon filter at the top of my growroom is enough? If you had an easy access attic (I mean this is so easy I can use a box cutter to make my exhaust opening) what would you do?

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First off, I would go bigger than a bathroom exhaust fan. You don't know how much heat your going to get once the weather gets hot. Best to go as big as you can afford. I use a 465 cfm inline fan running through two 400 w reflectors. They run cool enough to allow me to set the reflectors within inches of the plants.
I'm not real clear if your room is in the attic, or you just want to vent out from the attic. Eather way, I would vent the heat straight out through the existing vent, or possibly through a gable vent. I wouldnt worry about infrared sensors and shit. The heat that your venting is no hotter than your hot water heater vent.

hey your gonna have to go with the bigger fan for the light.

you sound like me about a 400. "is it hot?" lol. It is hot! and bright. you will wanna kill every ass who told you other wise. If you have never had a hid light up close in your house the experience will blow your mind. !!! seriously dudes remember back when your firdt hid made you laugh. A fucking streetlight in the house, lol.

You need a big 6 inch at least 400 cfm fan. A real inline. Good news is craiglist has all that in the garden section. Also ebay has auctions. Also their are hundreds of stores. Search you could prob get a used on craigs list for 50-60 bucks. That is another damn thing, lol, damn thing (I love my equipment now, so does my girlfreind,HA!) anyway that thing is another peice of industrial equipment you will havetp get used. Like being in the military and climbing in your first tank style.


then you need a good ballast and a good hood and a good bulb.
YOU NEED THESE TOO, lol. SOunds like a lot. But it is worth it when you got good equipment. Or at least diy that works. My worm barn is getting better. hehe. you will need that too.

go digital on the 400. I just did and wow, the difernece witha lumatek and a sheilded cord and hood is awesome. trust me, they got that 30%!

all but the bulb on craigs list easy. Well. make sure you get either a blue or a purple ballast if lumatek. Electric interfernce. Be weary there. Old digi wont work in homes.

Hoods, get a wide air cooled hood. They are all long but width is hard to find.

Then I suggest a tent. That can be taken down and provides perfect environment control. Odlt enough closets and bathrooms and similiar deals are harder to control thatn you think. YOur plants get touchy, the good ones do over 77. They like it at nothing higher than 77. The dont seem to mind 65. Ideal is like 75-77 then an eight to ten drop in dark. Helps out no more than that.

the tent will be easy and you can take it down.

If you were to theoretically control the air at the exhaust with long tubes or just a long way to go you could get the exhaust air the same temp as the room air, Then you could hace a bathroom fan or a small duct fan, x inch blowing air out. On the ohther side of the room. Like 20-30 dollars plus tax. I sax becasue you dont want the air to be blowing out an odd temperature. I am sure you know what I mean,

hey, guys I am so stoned and loaded form pain meds, this response is like a campaigns to SEE HOW MUCH I CAN WRITE DOWN SORRY, about the length but I have recently done all this.

My exhaust has a filter in the tent the pulled and pushed put the tent where a uv ozone generator sits. I took the lid and stuck it in the exhaust. Like a man made big blue. Cool

SO get all that amd you will be set. Use all the cations about ozone. It is cheap bu dangerous. NO sparky kind. they kill plants.

for summer you will need an air conditioner. Water based ones are cheap but the good ones are expensive. I mean the portables ones.

Temps get hi over 80 easy in places where it does not snow.

user a tent! controlled enviro is primo compared room. just the mechanics of air.

you get all this. I am sure. I stoned on good finger hash from northern lights.

oh yeah, you can buy all this on craigslist al together by guys getting out of growing. dirt cheap.

I've got a grow room inside the house (this house is small but it's good cause I live somewhere else.) I'm wanting to vent through the attic because the AC only keeps room at around 75 because of attic leaks. So, I figure it's better to have it vent up there.

so we're in a similar boat, or should i say house. I too have my own house, no attic so i use an upsatairs bedroom and vent out an open window with an in-line duct fan from HD works geat different sizes 4"-16" so you vent correctly, but my plan for summer is to install a fake stink pipe (the pipe that allows the bathroom toilet to vent, a piece of pvc out the roof with a roof boot, totaly nonsuspicious) and hook the vent to that and vent out the roof. But i don't know your location, so not sure if you can do this. I happen to build house and live small town in Maine so not really an issue here

The thing is, I live in a "tropical" country so our temperature right now is around 85. In summer it's 90 or 95. If the exhaust ends up only being 90, wouldn't they have no clue? Anyways, I'm not TOO worried about it, where I lived the government is very lax on MJ, but I figure better safe than sorry

400 watts in a 4X4 foot area....ur gonna have some dinky plants bro. my boy has 2000 watts in a 4X4X7 foot area. he has buds the size of trucks...

NegligentMother said:

400 watts in a 4X4 foot area....ur gonna have some dinky plants bro. my boy has 2000 watts in a 4X4X7 foot area. he has buds the size of trucks...

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That's overkill. Two 1000w? Tell your "boy" to stop wasting money. First of all, the area I will be using will be a lot smaller initially. I'm not going to stick my plants into flowerig at 4 feet They will be probably 1 or 2 feet, I gave the dimensions of the room for exhaust so that I can have adequate airflow and cooling.

400w grows fine. It's about knowing how to use your light, not spamming your plants with as many watts as you can.

...my 'boy' is hardly wasting energy... he pulls a gram a watt in that 4X4 space. and he hardly vegs his plants. im pretty sure you aren't gonna harvest any where near 2000 grams off ur little 400 watt there buddy.


btw its a duelzilla cool tube with 2- 1000 w bulbs in it. stays mad cool. and its on a light mover..

more light=more yield...please tell me where you found otherwise?

line the roof with tin foil over your lights. when i used to pick out in the wiled pot fields we used it to cover our heat up so the C.O. planes could not pick us up worked great we put it in our coats pants and hat IT STOPPED THEM FROM PICKING UP OUR HEAT!