UGH! BRAIN HURTS. Opinions of this ROOM SETUP???

[pftek]

Got 2 rooms. 1 smaller one larger. the larger room is about 9.5x10. Inside that room is 4k lights. 2 fans. 1 for the lights 10" fan at 790 CFM and the other is the same for the carbon filter.

the room will filter itself. the carbon filter will just recirculate the air (since I don't want to suck out the COOL a/c air coming into the room)

5,000 btu a/c.


there are 2 90 degree turns in the set up right near the fan. i don't know how to get around this and does it even matter with that much cfms?

does the Carbon filter need to create a negative? Will this be enough to clean out the smell?

in the second room for the air i will have the outtake a little higher and the intake lower (heat rises). I may also build a box around the outtake so none of it gets released into the room only outside.

what are your thoughts? this okay? the GREY is closed cool hooded vents. the boxes on the line are windows.

 

[what the]

If the proportions are accurate that outer room is not nearly large enough to cool 4kW. You should be exhausting the lights outside.
Also 5000BTU isn't enough to cool 4kW even with air cooled hoods. I'd use a 15-18kBTU. It'll be the best extra $150 you ever spent.

 

[pftek]

If the proportions are accurate that outer room is not nearly large enough to cool 4kW. You should be exhausting the lights outside.
Also 5000BTU isn't enough to cool 4kW even with air cooled hoods. I'd use a 15-18kBTU. It'll be the best extra $150 you ever spent.

how bad is it looking at 5,000 btu? lights running at night...

 

[what the]

It will not keep your temps in line. That bad.
There isn't much difference in price.
Like I wrote, you won't regret having a solid a/c

 

[desertsquirrel]

Are all your watts 1000's? or are some of them 600's?

Do you keep your ballists inside the room? or in another room?

what size are your hoods? and ducting?

what are the actual room temps, as well as outside temps?

How strong is your duct fan? (1 fan for 4 lights seems low unless its a very good fan or using very small hoods)

5k btu might not be enough but i am unsure how that is known w/o answers to these questions....

 

[what the]

Are all your watts 1000's? or are some of them 600's?

Do you keep your ballists inside the room? or in another room?

what size are your hoods? and ducting?

what are the actual room temps, as well as outside temps?

How strong is your duct fan? (1 fan for 4 lights seems low unless its a very good fan or using very small hoods)

5k btu might not be enough but i am unsure how that is known w/o answers to these questions....

assumptions.

ballasts are assumed outside the room
min 6" ducting to hoods
outside temps typical american summer highs (it can be 100deg anywhere in the US continental) And honestly it doesn't matter too much. The heat generated by the lighting is the main concern. You don't gain much from low outdoor temps assuming it is inside an insulated area. I'm not saying it doesn't matter, just not as much as you seem to think.

1 750 CFM fan for four lights is fine. (notice he says the size in his post) You get diminishing returns on high air flow over your hoods. Bigger is sometimes not better.

It doesn't matter where he is (within reason). 5kBTU will not cool 4kW

"What size are your hoods"???? Who cares?

 

[pftek]

Are all your watts 1000's? or are some of them 600's?

Do you keep your ballists inside the room? or in another room?

what size are your hoods? and ducting?

what are the actual room temps, as well as outside temps?

How strong is your duct fan? (1 fan for 4 lights seems low unless its a very good fan or using very small hoods)

5k btu might not be enough but i am unsure how that is known w/o answers to these questions....

Electronic ballasts inside the room. 8" hoods. 8" ducting. current temps around 85 degrees. How cool do I need it? less than 95 or so?

Fan is 790 cfm 10" fan.

i can quickly bump the 5k fan to 6.5k if that'll help. I can also co2 pump the room. currently not co2ed...

 

[desertsquirrel]

I just was thinking that with the right hoods, fan and climate it might be possible... but 85 is way too high.... sorry.

 

[dtfsux]

I speak from experience of a 10K op just so we are all clear on how "I" know

I used a 24k BTU AC with 9k of lights, most air cooled. My experience tells me you are going to need a much bigger unit, like 15K that was mentioned.

Secondly as pointed out already, if you are going to use that little area to exhaust into, and pull air from, forget it. that room will be hot in no time. the intake needs to be from outside or under the house.

You want the room at 75 with no CO2, 85 max with CO2. Keep in mind that most experienced growers agree that CO2 is not needed the WHOLE flower time and cooler temps during certain stages are desirable. So adding CO2 is not the end all be all solution to your heat issue

 

[what the]

i can quickly bump the 5k fan to 6.5k if that'll help. I can also co2 pump the room. currently not co2ed...

by "5k fan" do you mean your a/c?

I'll assume you did. 6500BTUs isn't going to do it either. You really need a lot more cooling power than that.

What dtfsux wrote is right on (again). Although I typically run around 78. But most agree the range is 75-80 no CO2.

 

[teemu shalanie]

I agree with the others bigger a/c to cool 4k watt lights, a 5000 btu could do like 1 light maybe 2 ? , look into water cooled a/c's very affordable and very effective, I assume that the 5000 watt ac is a window banger?, sounds like time for an upgrade
peace TS

 

[pftek]

don't people grow in like mexico and other really hot areas?


90 degree temps for 12 hours will kill the plant?

i can upgrade to a 10kbtu. I should be exhausting my lights outside... but that room exhausts directly outside. the intake is too but it goes through a room first.

im worried that if i put the exhaust straight to the window LIGHT will come through the exhaust and I need some way to block it out.

 

[floater]

playing the devil's advocate...

is 4kw really a great way to start for ya?

sure, plants can grow outside in 100* plus temps given enough water etc.

indoors, you really want to keep the room in the high 70's to 80* max. generally, plants are much more roboust/tolerant outdoors. indoors, you must be more exacting in your approach and provide them with a really clean, quality environment.

you realize that the more equipment you add (CO2, lights, A/C) the more variables there are to work with, the more to go wrong? in that size room, i'd start off with 1kw, buy a bigger fan/filter than necessary with a dimmer switch, and build out the room so you can expand to 2kw or more. after a run or two of 1kw, add the second light. run it a couple times. if you vent a room like that correctly, w/air cooled reflectors you don't need A/C for most climates off-summer months.

that's a pretty tight room for 4kw. not saying it's too much, but if you're unsure of what you're doing, you could be wasting a lot of time/effort/money.

personally, i like having plenty of space to operate within my grow room. cramped grows are a pain in the ass! a room that size would allow ample space for 3x1000w (i like 1kw's) or you could go 4 or 5 600's (don't really like that idea- but throwing it out there).

 

[dtfsux]

don't people grow in like mexico and other really hot areas?


90 degree temps for 12 hours will kill the plant?

i can upgrade to a 10kbtu. I should be exhausting my lights outside... but that room exhausts directly outside. the intake is too but it goes through a room first.

im worried that if i put the exhaust straight to the window LIGHT will come through the exhaust and I need some way to block it out.

Read my post in the growers forum asking why outside plants can tolerate more heat.

It seems like the more heat, the more humidity you need which brings other problems. An indoor grow at 80+ RH is going to cause issues with the house itself, and possible bud rot.


For the exhaust put an elbow in it to make a light trap.

You say the small room exhausts outside. How? Just a hole or do you have a fan in there pulling fresh air in? What you need is a fan exhausting and a passive intake that will allow fresh air in.

I ran a setup like that except my AC exhausted into that same room and summer was a bitch. That room got hot as hell. Luckily my intake for the lights came from another cooler source

And basically you are running a sealed room. You are air cooling the lights, recirculating the room air. How are you going to bring in fresh air? You need to plan on venting the room every hour or so, or adding CO2

 

[faulker]

another option for you, forget about running sealed room. take the ac out of the window in your grow room, and exhaust both lights and filter out that window. get a stronger ac, min 14k btu, and put that in your small room(creating a cold room) intake cold air from in there.

 

[what the]

if you vent a room like that correctly, w/air cooled reflectors you don't need A/C for most climates off-summer months.

that's a pretty tight room for 4kw. not saying it's too much, but if you're unsure of what you're doing, you could be wasting a lot of time/effort/money.

personally, i like having plenty of space to operate within my grow room. cramped grows are a pain in the ass! a room that size would allow ample space for 3x1000w (i like 1kw's) or you could go 4 or 5 600's (don't really like that idea- but throwing it out there).

Please only give advice from experience.
There is NO WAY you can keep a 4kW 10x10 room cool without a/c or dumping a HUGE amount of odor outside. You'd need multiple large carbon filters to accommodate the airflow required to keep that room cool with no a/c.

And 10x10 is pretty much perfect for 4kW.

 

[Vegan]

find the biggest baddest 240 window shaker unit ya can and throw that sucker in there
pending onthe sub panel ya might end up using 2 12000 btu units 110flavor


at that point you could prolly seal her up and run any temps ya want..

 

[MIGHTYMITE]

4k i pull air from outside through the hoods the vented back outside
2 fans 6" each
2 window shakers

12000 btu each

10.6 EER

chiller
co2 gen
pumps manifolds
dehuheuy
ect ect ect

ambient temps in my hood get to about 100 on certain days

i can keep it 78-80 on a steady basis