New Sealed Room... few questions

[Choc]

Hi Guys

Im building up a Sealed Room and got a few questions as i have always run open vented high air exchange rooms.. anyway....

ok so a few questions:

1. Is a Sealed Room Totally Sealed as in no air in or out at all ever?

2. I have a mini split with 2 heads and have calculated that for every 1000w open bare bulb i need 4000BTU correct?

3. Got a Dri-Z-Air 1200 Dehumidifier and a Titan Controller and after the initial stretch i plan on running my R/H at 45% is this ok?

4. Couldn't make my mind up how i was going to fill the room with CO2 whether it was by bottle or a gas generator... i have opted for a GAS generator 4 burner type with a controller with 2 sensors one at each end of the room... i will have this set at 1500ppm does that sound ok?

5. Seen some people say that in a sealed room to get the full benefits of CO2 you need to be running a lot higher temps than normal for E.G. 90F as aposed to 78 at plant canopy hight... is this correct?

6. Normally i change the air in my normal rooms twice per minute and this sorts the smell out, will the same setup recirculating be ok or should i upgrade it?

Thanks for your time

 

[Phillthy]

how big is the room? are the ballasts in the room? mag or digital?

 

[Choc]

Thanks for the reply Phillthy

 

[Phillthy]

you should be good to go with that.

with the co2 controller, set the number at which it kicks on about 100 or 150ppm below your desired ppm. the burner may kick on a tad more frequently but only run for a short time therefore not increasing temp. i am running almost 6k with a 30k btu split, dehuey, co2 genny and my temps dont vary but a degree or two. i have it set to 80 and it runs 77.

place the indoor part of the mini-split as high on the walls as you can. this takes the hottest air from the ceiling and cools it. they also blow from the bottom so you want them up high to hit most of the room.

i would start running the lights at 750 to keep an eye on temps. they should be straight. bump half up to 1k then check. then bump them all. you should be ok with 33k btu and two air handlers especially with digital ballasts. 45-55% humidity is fine.

best of luck bro.

 

[Choc]

thanks for taking the time to reply shit you are the only one....

so in regards to what PPM of O2 is 1500 about right and what your saying is run it at 100 to 150 lower say 1350 to 1400PPM right?

also do you purge your room or run a tight sealed room 24/7/365?

internal split high as pos and bump lights up bit by bit... Got it...

thanks Phillthy your a Legend...

 

[LittleAmsterdam]

A sealed room is totally sealed and relies on CO2 supplementation and a good A/C.

 

[Choc]

 

[budleydoright]

I find it a little difficult to run 85f 1500ppm. Mine like 1200 and 78-82 a lot more. There's lot's of fine tuning, every system is different and strains react differently to hot rooms.

There's also a sweet spot, that my equipment seems to work the best in. It is dependent on the ambient air temps outside as well. It's basically balancing the load between the dehuey and AC.

I would also recommend getting a sulpher burner right away. I use a presto fryer from walmart, 25 bucks. Learn to use it and avoid the battle of PM, pests don't like it but the plants do. I currently run mine for 30 minutes 1X a week (small space). up into week 4 or 5.

 

[Choc]

Thanks for the Post Budley... i have a Hotbox Sulphur pot already i run it for 4 hours when the lights are out

on the PM front this new room will be brand new all walls and celling plastered and painted with 3 coats of high grade bathroom anti fungal paint and get a regular dose of Eagle20...

so do you run a completely sealed room as in Zero air exchange?

 

[budleydoright]

so do you run a completely sealed room as in Zero air exchange?

Yes, completely sealed. However the doors do all come off once a day.

Do you find you need eagle20 even with the burner?

I don't see it since I've been burning and run my RH higher in veg as a result.

 

[Choc]

i have not yet run a sealed run and i have dry walls that have the spores imbedded in them as they was not painted after the first grow and i had Budrot and PM and feel it is with me for life untill i rip it all out... not that the new room will be at this location but still needs ripping out...

 

[budleydoright]

what good is a duheuy if the air is exchanged that much? you may have to dehumidify the whole planet to get your levels down.

 

[Choc]

because at night when the lights are out i only have an 8 inch fan and carbon exhausting and the humidity starts to creep up

also when the lights and large fans are on there is air flowing all around from fans, inlet air curtain and dehumidifiers it mixes together and drops the R/H by 10%... this is a fact... outside RH is 94% grow room is 50% lights are on and its 2am here

 

[CannaBunkerMan]

It sounds like you're already doing it how I should have done it in the first place. You seem to have surpassed me, young grasshopper, I have nothing left to teach.

Oh, and 90f might be a little warm, but if the plants are a rocking...

 

[budleydoright]

wow 94% lucky if it hits 30 here.

 

[Choc]

well it was raining at 2 am lol

 

[Guest 18340]

because at night when the lights are out i only have an 8 inch fan and carbon exhausting and the humidity starts to creep up

also when the lights and large fans are on there is air flowing all around from fans, inlet air curtain and dehumidifiers it mixes together and drops the R/H by 10%... this is a fact... outside RH is 94% grow room is 50% lights are on and its 2am here

Why not just dehumidify without exchanging? You're wasting $$$ on electricity to constantly exchange dehumidified air.
The way I run mine the dehuey and AC act as a system. When lights go out and humidity rises the dehumidifier kicks on. The warm air from the dehimidifier causes the AC to turn on.
In turn, the AC starts to dehumidify and drops the RH, which causes the dehuey to shut off, which causes the AC to shut off, which causes humidity to rise, which kicks on the dehuey, which kicks on the AC, etc etc...
With this system I can keep my RH @ a constant 50-55% ( the Dehuey kicks on @55% and shuts off @50%.

 

[Choc]

if i do not exchange the air in room i will stink my whole street out

my current room is not sealed and trust me i had an electric blow out last year week 7 of flower and could smell it in my house 100ft away

TBH there is no issue with this room it runs fine other then its prone to PM and again i know what the cause is and ripping the whole room out and cleaning painting everything is the only option...

was the questions in the first post i wanted answered

 

[budleydoright]

ok so a few questions:

1. Is a Sealed Room Totally Sealed as in no air in or out at all ever?

Correct, Some will resume venting at night for humidity control. however you give up some of the benefits of running sealed when you do.

2. I have a mini split with 2 heads and have calculated that for every 1000w open bare bulb i need 4000BTU correct?

That is the coreect number per bulb, I believe you need to add that to whatever it takes to keep the room at your desired tempurature to begin with.

3. Got a Dri-Z-Air 1200 Dehumidifier and a Titan Controller and after the initial stretch i plan on running my R/H at 45% is this ok?

That things a monster! and yes that is pretty ideal.

4. Couldn't make my mind up how i was going to fill the room with CO2 whether it was by bottle or a gas generator... i have opted for a GAS generator 4 burner type with a controller with 2 sensors one at each end of the room... i will have this set at 1500ppm does that sound ok?

5. Seen some people say that in a sealed room to get the full benefits of CO2 you need to be running a lot higher temps than normal for E.G. 90F as aposed to 78 at plant canopy hight... is this correct?

A generator is the most effecient way to ad co2. You are going to need additional capacity in your cooling to offset the heat. I would introduce the co2 at a lower level to begin with, don't be too set on 1500, find what works best. Every setup is unique in pretty much every way! Like I said in my earlier post, running at 1500 and 85f in my room doesn't work as well as 1200 and 80. Plants just look happier. Things run smoother.

But yes, higher temps are required to speed the metabolism of the plant up which increases the use of Co2. 1500 85 are said to be the ideal for maximum growth, provided all other needs are being met.

6. Normally i change the air in my normal rooms twice per minute and this sorts the smell out, will the same setup recirculating be ok or should i upgrade it?

It should be, just have to try it. when I ran a real stinky strain, nothing I did seems to make a difference in the room. Ran ozone generators to contol the seepage outside the room. the better your sealed the less this will be an issue. Now that I run lower odor strains, I only treat the air outside the box, no scrubber in.

 

[Choc]

Cheers Budley..