What's new
  • As of today ICMag has his own Discord server. In this Discord server you can chat, talk with eachother, listen to music, share stories and pictures...and much more. Join now and let's grow together! Join ICMag Discord here! More details in this thread here: here.

Calling mini split ac experts...

Status
Not open for further replies.
RedReign

RedReign

Active member
OK, I'm no mini split expert, but I'll give my $.02 and a bump.

You would be cutting it very close with 24k btu. 4800 watts, a CO2 burner, and a dehumidifier (which you will need), all put off alot of heat. Maybe due to your climate you can get away with it.

I run a 6k (aircooled), 24x10x8, CO2 burner, and a 25k thru wall (window mount) AC. My room is well sealed and insulated. The 25k btu AC is just right. I live in an area where it is 90-110 degrees 4 months of the year.

Good luck.
 
V

VenturaHwy

Active member
ICMag Donor
Veteran
Co2 burner in a sealed room - is there a chance of Co or other poisonous gas from the burner?
 
Last edited:
ShootinBudz

ShootinBudz

Member
It is the same mechanics as the gas stove or heater you probably have in the house. Sounds sketchy, but with quality components and common sense it should work fine.
 
G

grow nerd

Not enough cooling capacity with a 2 ton unit. Also obviously depends on the CO2 generator's output, insulation & seal level, etc.

I'd start looking at something like 3 tons. Might be able to pull it off with 2.5 but why bother. Generally at around >2 tons you will be going from mini-split to "standard" split systems. Difference is typically larger air handler (and no built-in thermostat), no flared / quick connect fittings, larger outdoor unit, oftentimes lineset not included, and separate thermostat cable typically used (whereas you could easily do a mini-split with something like 14/3, 12/3, etc).
 
D

dongle69

Another old thread that I forgot about....
I went with a 2 ton unit (24,000 btu mini split) and it is working perfectly.
This was for my second house (garage) which I don't live in, and it has been problem free.
I'm still air cooling my "at home" setup.
 
G

grow nerd

Damn I was wrong by a decent margin. :bashhead:

What size is your CO2 generator? What temperatures do/can you maintain? Ambient temperatures?
 
D

dongle69

Sentinel VGC-27 generator.
I have lights on temperature at 82 degrees.
 
N

noone88

Member
I just had a 3 ton Mitsubishi Mr. Slim installed. It had to be installed professionally (unless you know how to do the vacuum lines and buy the refrigerant).

The cost between a 2 ton compared to a 3 ton is marginal, however, you can never have enough cooling. Also look for a unit with inverter techology, which means the amount of cooling will ramp up and down, unlike some models which are either on or off.

15+ SEER is something you should look for as well. 13 SEER seems quite low.

My 3 ton unit was 2,400ish, no sales tax, free shipping.
 
resin_lung

resin_lung

I cough up honey oil
Veteran
I also run a 24,000 btu mini split. The room has 6 1000 watt lights in uncooled bell hoods. I run a tank, not a burner, and my ballasts are outside the room. It is completely sealed. It keeps the temps during light hours at about 82-83 degrees and only gets rest for very short periods of time, if ever. if it gets really hot outside ( 113 ) the A/C struggles to keep it under 90 degrees. You think my A/C needs service? Did I just cut it too close?
 
Dirt Nasty

Dirt Nasty

Member
An A/C can surely be over sized. It will short cycle and never get the humidity out of the air. It is also bad for the compressors to run less than ~5 mins. It doesn't allow enough time for proper lubrication and expansion of parts inside the compressor, leading to shorter life spans.

Inverter tech will not make up for an over/under sized A/C. Do your homework BEFORE you spend money on something you may regret later.

Spend the necessary time to fully understand and plan your grow. Get it drawn out on paper and walk yourself through a FULL GROW in your mind. Change the rez, adjust the lamp, etc. in your head and work out the kinks.

I see too many people on here rushing to slap a grow together and setting themselves up for failure. Didn't you learn anything from school? If you don't do your homework or pay attention, you're destined to fail, and you have no one to blame but yourself.

/rant
 
D

dongle69

resin_lung said:
I also run a 24,000 btu mini split. The room has 6 1000 watt lights in uncooled bell hoods. I run a tank, not a burner, and my ballasts are outside the room. It is completely sealed. It keeps the temps during light hours at about 82-83 degrees and only gets rest for very short periods of time, if ever. if it gets really hot outside ( 113 ) the A/C struggles to keep it under 90 degrees. You think my A/C needs service? Did I just cut it too close?
Click to expand...

With temps that hot outside, you definitely should have gone with a bigger a/c.
 
resin_lung

resin_lung

I cough up honey oil
Veteran
On average it's not that hot. but sometimes for a week or two. I think your right though. Never hurts to have extra. That A/C has been going non stop for like four years now. It's time to retire her anyway. she's been good to me, but it's GONNA fail sooner or later anyway. I'm gonna go with a bigger unit. thanks
 
Dirt Nasty

Dirt Nasty

Member
There are many factors involved in the selection of a properly sized A/C. Every construction material used is factored in as well as ambient temperatures and heat load of electrical equipment.

One can easily learn how to do a simple heat load calculation if they're really interested in fine tuning a room before having it stuffed with plants. There is nothing worse than spending all that money on a mini-split and finding out that it is inefficient in cooling or managing humidity.
 
Status
Not open for further replies.

Latest posts

Latest posts

Top