8kw Room - Cooling and Odor Control

[MedGuy510]

Okay,

So my new flower room will be 8kw. It will be in a garage with a pretty high ceiling and where not all the space will be utilized for growing. Only about 1/2 to 2/3 will be used for growing.

I'm getting 6'' flange coolhoods for all of the lights and was just wondering what I should consider when buying my ventiliation fan and my carbon filter. I remember there being a formula for CFM size when considering air exhausting needs but I don't remember there being a formula for cooling needs. Since I am working with 8kw I figure heat will be an issue.

So, I want to get the right size fan and the right size filter so (a) I have the healthiest plants possible and (b) my neighbors don't have to be concerned with the dead skunk rendering plant operating next door

 

[opt1c]

it all depends on how you setup your lights... if they are aircooled and you get the air from outside and your system is sealed you can expel it backout side no problem... with the fans, again it depends on how you set up the lights, one bank, two banks, all in a row, staggered, etc... air cooling puts some limits on that but if you have the vertical room i'm sure you can make it work no problem... if you're running two banks of lights probably 2 6'' inline fans on the end of each bank pulling the hot air out might be sufficient with maybe one 8'' on the intake pushing air into a larger duct that branches out the 2 6'' ones... 8'' in the front and the 2 6''s in the back... but like i said before, it all depends on how the lights are setup

for odor you'll probably want some really large 5-6ft tall filters with 8-10 inch fans on them recirculating in the room just to scrub the air along with another one attached right before your exhaust fan, make sure all the fans pull air through the filters and don't push air out of them.

hope that's a start -opt1c

 

[yamaha_1fan]

it doesnt matter if you push or pull through a carbon filter, as long as you have a pre screen in place.

I use a 12" fan and can 150 to recirculate my room, roughly 600 SOG plants. Seems to be working good


There are some pretty good reads/debates on how to aircool your lights. I would suggest doing a search. A manifold design is probably the best option.

If you pull air through your hoods, versus push, you do risk pulling stinky air through cracks and gaps in the hoods. Hoods are not usually 100% sealed so a filter on the end of the system may be wise if pulling air (which seems to be the most effcient method)

 

[MedGuy510]

opt1c and yamaha_1fan

If I am reading correctly, it looks like you two advocate setting up a big can filter in the room that only recirculates growroom air and another fan or set of fans to cool the lights and exhaust the room with smaller filters on them too?

Why not run the cooling air through the same system that eventually passes through the large can filter and fan? This way you get the whole job done with one filter and one fan. Or does this way not eliminate entirely the smell?

 

[opt1c]

you'll need a filter on your room exhaust but not your light exhaust if your lights are sealed up, like metallic hvac duct tape around the glass, and the intake and exhaust for your lights don't take any air from the room where you grow... otherwise a filter on the end of your exhaust ducting for your lights might make you a bit safer, it all depends on if u can smell it, how much u smell, where you are, and how much it matters and you care about it.

if your lights are sealed you can get away with one filter in the room but with 8k you're going to need more than one fan

 

[yamaha_1fan]

in theory, your lights should be sealed. In reality that doesnt happen. If you want to tape around all the seams and leaks, you can, But then when you want to clean the glass, all that tape has to come off to open the glass.

It really is just a matter of preference. I would run a filter on the end, just to be safe versus taping, that way I was sure and didnt have to mess with the tape.


Air dynamics can be complicated. I suggest you do a search and read some threads. Hoosierdaddy seems to chime in on most of them and seems to know what hes talking about.

You probably couldnt move enough air through the lights and recirculating the room through one filter to make it work properly.


Is the room going to be sealed? Do you have A/C and or CO2?

 

[cyberthreat]

are you new to growing because your going wast alot money time and get no reward I did it and I would say I wasted 1000$ and I didn't get gram for my troubles then the hydro system I built was reusable but if I looked Back I would design it better thank god some of the stuff came in handy when I did learn the right way to grow but I put 500$ in the trash can plus I busted a hole in my wall and I told friends which was stupid my friend threaten to kill me if I didn't give him a half once for free weed I didn't have I had to move but thanks to member's here at icmag I learn please read I did a year of reading and now I have nice personal garden that only 2 peaple know about and that's me and my mom which loves growing she even goes to the normal freedom rally and I can trust her with my life and everything stays under lock and key and I don't Sell and I have no friends so no traffic in and out of my house plus I found out thanks to my mom opening my eye's to show me how they were using me

 

[yamaha_1fan]

are you new to growing because your going wast alot money time and no reward I did it before i would say I wasted 1000$ and I didn't get gram for my troubles thank the hydro system I built was reusable but if I look Back I would design it better thank god some of the stuff came in handy when I did learn the right way to grow but I put say 500$ in the trash can plus I busted a hole in my wall to and I told friends which was stupid my friend and threaten to kill me if I didn't weed I didn't have I had to move but thanks to member's here at icmag so please read I did a year and now I have nice personal garden that only 2 peaple know about it that's me and my mom which loves growing she even goes to the normal freedom rally and I can trust her with my life and everything stays under lock and key and I don't. Sell and I have no friends so no traffic in and out of my house plus I found my friends thanks to my mom open my eye's to show me how they were using me

What does that have to do with the OP's question?

Also, I am not typically in the habit of being the grammar police, but WTF are you rambling about? That whole post, no commas, and one period. That makes it hard to read

 

[cyberthreat]

I'm just try to help not trying to piss anyone off and I saw his 4 post count so I'm trying to save him some troulble and it sound a pipe dream and about the grammar I quit school never learn how to use punctionb but the who do you react you like an ass that's hard for noob's because everyones ego gets in the way

 

[cyberthreat]

it is a weed growing forum for one does it really matter STFU and let the learning begin so we can over grow the country and change the law's

 

[Weedman Herb]

And I was actually waiting for a lesson from you ... when does the learning begin Teach? You are a cyberthreat ... and probably 15 ... Young Morons and HID lighting don't mix ... Neither do kids posting at an Adult weed site ... and I suggest you stop huffing chemicals sooner than later. How was ANY of that trying to Help someone ? What are you trying to say about growers/stoners ? Even people who speak/know very little English and have been smoking weed on the regular for Decades make more sense than you do. You need to grow up and get back in school. What I did understand of what you wrote I didn't believe ... So your 4 worthless posts in this thread aren't clutter? "Don't Waste Your Money" is the best advice you can give for cooling and odor control on an 8000 watt grow? Or should dudes friend threaten to kill him for a half ounce ? That doesn't sound Cool and it stinks ...

 

[cyberthreat]

I ain't no kid my moms 50 and i'm 20 and don't take me serious what do I care I'm trying to Warn him before he wasted any of his money because I did ok I refuse to fight over the Internet because you along with most other peaple her got to have ego problems and it gets in the way of learning I never said I was teacher and also I'm not going clutter up the forum because someone got a ego problem's also I don' t claim to know more than anybody on her its just sad to see some one not get the right info because of peaple like you flaming post because you have a ego problem or they have to read through pages because you want to fight so just drop it

 

[MedGuy510]

Please don't argue in my thread gentlemen. Save that for PM's if you feel the need.

I don't have A/C...I'll be running my lights at night and will get an A/C if necessary later on. I plan to use C02 after I dial in a couple harvests with this setup as this is 5 times bigger than any grow I've ever done. The room will have to be as sealed as possible as this house isn't in the boondocks. I figure if I get a big enough fan and cut the intake smaller than the outtake any leaks in the room itself will suck air into the room instead of let it out. Is this good logic?

I could always just buy all the lights, can filter, and exhaust fan and just see how hot it gets in the room without cooling, then figure how much cooling I need from there. It's a room with pretty high ceilings (12' or so).

Do you recommend recirculating growroom air with a large can filter and then using another can filter inline with the exhaust fan or just using the can filter inline with the exhaust fan? Like I said, I'm in the suburbs and do have neighbors.

 

[yamaha_1fan]

LOL, OK Medguy

Get an A/C now. I run 9kw. 6KW are cooled, the last 3 are not, long story.

It can be 20F degrees outside and my A/C will still kick on. Those lights are going to heat up the room.

I figure if I get a big enough fan and cut the intake smaller than the outtake any leaks in the room itself will suck air into the room instead of let it out.

that is not a sealed room


Sealed room means SEALED. no air in or out. This is usally only done if you want to run CO2. If you plan on running CO2, then you should build a sealed room. a sealed room pretty much requires an A/C. No matter how much you cool those lights, heat WILL build up in the room. While not mandatory, air cooling the lights is pretty standard. Pull air from outside the room, through the lights, then out the room

Non sealed room means you pull air out of the room and pull fresh air in like you mentioned above. You can still control smell by exhausting through a filter. This is referred to as negative pressure I believe. You pull out air and it creates a suction pulling air through all cracks and intakes to your exhaust. If using CO2, where do you think the CO2 goes? Yup, out the exhaust.


Eiether way, you can control smell, no problem.

Lots of options. So do you want to run a true sealed room or non sealed room?

 

[Che]

Is your garage attached? If it's possible to draw warm air from the home, filter that, and use it to both cool and refresh the air in the grow room. Then put a large carbon filter on a fan, attach to your air cooled lights and blow clean scrubbed air through and exhaust to the outside. This way you have a less complicated system and it ensures that the heat is discharged and clean air is the only thing going out.

You can add interior scrubbers as needed.

 

[MedGuy510]

yamaha-

as exciting and fun as a sealed room sounds, i better take the dummy route right now. it'll be complicated enough to steps things up to this number of lights without worrying about CO2 and a sealed room. Thx for clarifying this point though...sounds interesting to think about in the future.

Regarding A/C, what's funny sounding here is that I know somebody in the town over who runs 8 lights and they don't use A/C at all. From what he says, I think he just runs one of those huge can filters and a high powered fan to exchange air in the room, cool the room, and clean the air all in one go. I'll have to talk with him about his method again before visiting the hydro shop.

btw, I've been watching your grows in that room for a while now and think you are doing a bang up job. more plants than I've got the balls to grow though...I'll be doing a 6 week veg and using 4 plants per light.

Che-

I'll think I'll do something like this, but maybe do the opposite and blow air from the grow room into the house so I'm the first person to know if there is a smell problem.

 

[yamaha_1fan]

If you are pulling air out of the room, you wont A/C it cause you will just pull it out.

Your friend/buddy/associate sounds like hes doing a typical non sealed room.

Theres a formula but you will want to exchange the air in the room very rapidly to get rid of the heat


And thanks for the compliments

 

[MedGuy510]

coolness. I'll see what kind of temps and smells will result from the lights and a can filter attached to an exhaust fan and make cooling and scrubbing modifications as needed.

I appreciate your help.

 

[Bozo]

I use double odor protection I recirculate through a can filter in room 24/7 that keeps it 99% contained ,And i use a vaportec 4000 to cover up the 1 % my grow room is freshest smelling room in house even with very smelly strains
I would agree with Yamaha about the A/C 8 k will create heat that will require mass air exchange to keep cool .What are your summer time temps ? gonna be hard to cool with 100 degree air from outside .I suggest you set up room and do a dry run for 18-20 hrs and monitor room . That way you dont kill all yer plants .Good luck 8 K has to be a ton of work my 2 k seems like a part time job some nights

 

[MedGuy510]

Good advice, I'm going to see what kind of heat is generated by the lights alone and buy extra fans as necessary. summer temps can get into the 100s in the daytime, 80s average, but I don't plan to switch the lights on for 12/12 until 8pm.

garden time is fun time ime...then again I've never done this many lights.