Sealed room c02 cooling

[Smokehaze]

I've been running a fairly large grow for a few years now that has required 2 25k btu window ac units with a 2 ton ductless ac at 24k btu. I need around 75k btu to keep my room right. Recently my ductless went down and right after that 1 of my window units failed. I want to upgrade to a central ac unit 6 ton. Its a stand alone system so it doesn't need a furnace assist. My question is, when it comes to c02 will a system like this mess with my c02 ppm? Mini splits seem to be the best but in order to hit my range the cost is much more than a central air unit. Mini splits don't mess with my co2 range but the 2 window units it would seem that it would but hasn't.......For now im running 2 25k btu window ac units running with an aditional 800 cm fan pumping cold air into room on an atmospheric control unit but it kills my co2....I'm in Michigan so its really cold, the cfm is maintaining my temps barely but ya, killing my c02.....Anyone care to school me here a bit....Thanks in advance.

Equipment
12 1k parabolic domes
6 led dominator series leds 500 watt
Running c02 from propane burner at 1500 ppm
Quest 205 dual dehumedfier

 

[Bigdaddy212]

Bump

 

[Dr.Nick Riviera]

if you're running a split system with a air handler and your handler is in the room, then no, it will not mess with the c02.
I personally would get 2, 36,000btu or 42,000 btu ductless units

 

[Jaybodankly]

12 1k parabolic domes and c02 from propane burner that is a lot of heat to get rid of. I would try and reduce heat sources in the room before upgrading AC. I would go sealed hoods, 8" ducting, straight runs, hard pipe and bottled CO2. That CO2 burner creates a lot of heat. Ceiling insulation in the summer would need to be addressed.

 

[im4satori]

after a certain point a large scale grow is to large to use tank

I have been down this road but not as big as your at... because I moved to a climate that is cool most of the year eventually I realized it didn't make sense for me to continue to use a/c

the equal electric bill cost of the a/c being redirected to add more lights ended up yielding more than the co2

the co2 burner adds heat but if your room is sealed well hopefully it wont run much
I put it near the a/c thermostat so the a/c kicks on with the burner

do you live in a northern climate, are you running sealed room all year?

whats the seer rating on your 6 ton unit?

substantial cost can be saved using the minisplits if your able to install them yourself

1/2 the cost to consumer is in the installation

its not extremely difficult...do you consider yourself handy?

 

[chemphlegm]

window units DO NOT exchange air with the exhaust side, so they dont rob c02.

I think people would be surprised to see how fast one flowering plant can exhaust all of the c02 in a sealed bag for instance, I was.
with 72 plants my unit would cycle for 20 minutes or so every couple hours to maintain 15ooppm.

 

[im4satori]

window units DO NOT exchange air with the exhaust side, so they dont rob c02.

either way for it to work he needs the co2 burner to run as little as possible.. a window unit isn't going to seal up as well as a mini split
he needs to be like mason jar air tight!

a central ducted system can be sealed well provided you use mastic on all you duct joints but over time itll become less sealed but you can do it

 

[chemphlegm]

yep, I pull my ac units apart and silicone the joints/perimeter of the foam insulation to complete the seal. my plants use 13 dollars propane a month in a 40x12 room. the humidity is more troublesome for me than the heat by far. I pull five gallons a day of water most months of the year.
I'd have split air too, if wife didnt mind a running unit outside the barn all winter.....

 

[im4satori]

if I ever run co2 again itll be only in the summer or if I lived in a warm climate I might only run 500ppm to keep the heat down

this would avoid bugs and humidity issues during the summer and keep me from having to spray

trying to get the performance out of 1500ppm is a good deal of work
its just easier to add more lights at an equal electric consumption as the a/c pulls from your monthly statement to get more yield than to do all that work sealing and gas and equipment

I already own all the stuff and don't use it

but again.. if I lived in a warm climate and was forced to run a/c to cool i might break it all back out

or if I lived in the north pole and didnt need to use a/c to run co2

 

[im4satori]

yep, I pull my ac units apart and silicone the joints/perimeter of the foam insulation to complete the seal. my plants use 13 dollars propane a month in a 40x12 room. the humidity is more troublesome for me than the heat by far. I pull five gallons a day of water most months of the year.
I'd have split air too, if wife didnt mind a running unit outside the barn all winter.....

does your current a/c unit run pretty much almost non stop most of the time when your lights are on? or does it turn itself off frequently?
what type of lights
how many watts per sq ft are you running in lights

 

[im4satori]

think of it like this

if your running 4 1000watt light over 64sq ft canopy (62watts per sq ft) and yielding 6lbs without co2

add the co2 and increase yields by 25% that's 7.5lbs for a 1.5lb increase

or I can just run 5 lights yield 1.5lbs per light and still get 7.5lb yield in the same space

if you happen to already be running 75plus watts per sq foot then you would need to add more space for this to work

 

[chemphlegm]

does your current a/c unit run pretty much almost non stop most of the time when your lights are on? or does it turn itself off frequently?
what type of lights
how many watts per sq ft are you running in lights

6 months on with the lights/heaters not needed six months 1/4 on with the lights/baseboard heaters on at night

space is twice whats needed for plants, they make a 10x10 foot print under 3/4 1k bulbs no hoods

 

[im4satori]

the a/c unit will reduce humidity but only if it runs frequently enough

if your a/c only kicks on a few minutes every 30 minutes it wont run long enough to reduce the humidity
if your a/c runs for 15minute out of every 20 itll reduce humidity a good deal without the need for an addition dehumidifier (which adds heat)

if its cold outside and your a/c barely runs then you got what you got and likely would welcome the heat from the dehumidifier

but if its somewhat warm and your a/c cycles on and then turns off quick because it is over sized and cooling the space too quickly then you need to use a smaller unit that will run longer in order to reduce the humidity

 

[MMJ Dreaming 99]

I've been running a fairly large grow for a few years now that has required 2 25k btu window ac units with a 2 ton ductless ac at 24k btu. I need around 75k btu to keep my room right. Recently my ductless went down and right after that 1 of my window units failed. I want to upgrade to a central ac unit 6 ton. Its a stand alone system so it doesn't need a furnace assist. My question is, when it comes to c02 will a system like this mess with my c02 ppm? Mini splits seem to be the best but in order to hit my range the cost is much more than a central air unit. Mini splits don't mess with my co2 range but the 2 window units it would seem that it would but hasn't.......For now im running 2 25k btu window ac units running with an aditional 800 cm fan pumping cold air into room on an atmospheric control unit but it kills my co2....I'm in Michigan so its really cold, the cfm is maintaining my temps barely but ya, killing my c02.....Anyone care to school me here a bit....Thanks in advance.

Equipment
12 1k parabolic domes
6 led dominator series leds 500 watt
Running c02 from propane burner at 1500 ppm
Quest 205 dual dehumedfier

Do the bulbs on the parabolic domes point down in a vertical manner or horizontal?

I once talked to a guy who used parabolics in a comml grow and liked them, He said the bulbs in a vertical posiiton (like some LECs) is much cooler.