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1 36,000 BTU Mini Split VS. Two 22,000 BTU Mini Split

sehnsee

sehnsee

Well-Known Member
Setting up my grow rooms in So Cal Im going to have a 10K Sealed flower room that I need to cool.

The 36K BTU Mini Split retails for $1999 and the 22K Btu goes for $999.

Wouldn't it make sense for me to run 2 of the 22K units giving me 44K total BTU ???

I know the labor for installation will cost me a bit more but Ill Have 44K BTU and I can set one up on each side of the grow room. I also read somewhere that they perform much better if not maxed all the way out.

Any thoughts?
 
P

patrickkawi37

Well-Known Member
sehnsee said:
Setting up my grow rooms in So Cal Im going to have a 10K Sealed flower room that I need to cool.

The 36K BTU Mini Split retails for $1999 and the 22K Btu goes for $999.

Wouldn't it make sense for me to run 2 of the 22K units giving me 44K total BTU ???

I know the labor for installation will cost me a bit more but Ill Have 44K BTU and I can set one up on each side of the grow room. I also read somewhere that they perform much better if not maxed all the way out.

Any thoughts?
Click to expand...
one 36000 btu is not going to do 10 lights so go with the two 22k . Even if your aircooling.. 44kbtu for 10 lights is a little low. I am using two 24k btu for 9 lights
 
P

patrickkawi37

Well-Known Member
sehnsee said:
It's a sealed room with co2 so I'm aiming for about 84 degrees.
Click to expand...
I have never met a person in real life that is a good grower and purposely aims to get temps in the 80s. Yet I hear it all day long on here. I do not think that growing in the 80s is a benefit. I keep my room at 78.. I figure it might be 80 at the hottest spot in the room. But if it's uncomfortable for me, I assume it's uncomfortable for my plants. People say they use more co2.. I find this to be bullshit. My plants are using a shit ton of co2 in the high 70s, and I always get over 2 per lamp. If If my room is anywhere in the 80s I get leaf taco'ing and hairy looking nugs
 
a mongo frog

a mongo frog

Well-Known Member
patrickkawi37 said:
I have never met a person in real life that is a good grower and purposely aims to get temps in the 80s. Yet I hear it all day long on here. I do not think that growing in the 80s is a benefit. I keep my room at 78.. I figure it might be 80 at the hottest spot in the room. But if it's uncomfortable for me, I assume it's uncomfortable for my plants. People say they use more co2.. I find this to be bullshit. My plants are using a shit ton of co2 in the high 70s, and I always get over 2 per lamp. If If my room is anywhere in the 80s I get leaf taco'ing and hairy looking nugs
Click to expand...
Those people shooting for those high temps are supposed to have their rh way higher also. Ive always wanted to try that just don't have the balls. Ill stay at 80 and have 900-1000 ppm of co2. Works real well in my garden. But have wanted to do 85 with 70 percent rh, I think thats what the scale calls for.
 
ttystikk

ttystikk

Well-Known Member
a mongo frog said:
Those people shooting for those high temps are supposed to have their rh way higher also. Ive always wanted to try that just don't have the balls. Ill stay at 80 and have 900-1000 ppm of co2. Works real well in my garden. But have wanted to do 85 with 70 percent rh, I think thats what the scale calls for.
Click to expand...
And it works like a charm, too!
 
P

patrickkawi37

Well-Known Member
a mongo frog said:
Those people shooting for those high temps are supposed to have their rh way higher also. Ive always wanted to try that just don't have the balls. Ill stay at 80 and have 900-1000 ppm of co2. Works real well in my garden. But have wanted to do 85 with 70 percent rh, I think thats what the scale calls for.
Click to expand...
Calls for some budrot with a side of PM
 
sehnsee

sehnsee

Well-Known Member
I run 1500ppm co2 for the majority of flower, In smaller 4 light grows i let the temps get to about 86.

I read a while back that the plants cannot use the full potential of the co2 at less than 82 degrees and that 85-86 was ideal for the metabolic process. I can't recall exactly where but it was from scientific data, not a high times mag etc Lol.
ill try to lookup the info and post it here.

Im in so cal so the humidity and super hot temps not really an issue most of the time. I havent had any PM issues yet either (knock on wood).

It HAS Helped tremendously with my electric bill. Sometimes saving me 10-20% by not using as much AC.
 
P

patrickkawi37

Well-Known Member
My plants are using plenty of co2 at 78 degrees and I pull a gram per watt consistently . My plants all start to taco past 79-80 because of the intense light and heat is too much stress. You CAN grow like this, you will get hairy, potentials hermied plants with less color and most likely fluffier . I have grown in the 80s before when it was the only option. You said you are in SoCal... I truly doubt you are getting 28 from dispensaries growing cannabis at 86 degrees. If you are, that is one kick ass genetic you have.
 
Aeroknow

Aeroknow

Well-Known Member
Are you guys reading the temps at plant canopy, or just somewhere random in the room? Just making sure everyone is on the same page.
I set my controllers to 80F for lights on, with a probe right at the top of the plant canopy. That puts me at an average of 82F(80-84 max) at plant canopy(where it matters).
And because my rooms are usually perpetual, I set the co2 to 1000ppm.
 
P

patrickkawi37

Well-Known Member
Aeroknow said:
Are you guys reading the temps at plant canopy, or just somewhere random in the room? Just making sure everyone is on the same page.
I set my controllers to 80F for lights on, with a probe right at the top of the plant canopy. That puts me at an average of 82F(80-84 max) at plant canopy(where it matters).
And because my rooms are usually perpetual, I set the co2 to 1000ppm.
Click to expand...
I'm running 78-79 at canopy level . Room maybe a couple degrees cooler in some spots . I keep my room controller at the highest level in the room so it reads a higher temp (around 80) .but every run I walk around with a temp gun and make sure it's not in the 80s at any spot in the canopy . Underneath the canopy is around 75
 
ttystikk

ttystikk

Well-Known Member
Room temps about 80-82
RH 65-80%
CO² natural
Water temps 63-68
EC 1.4-2.0
PH 6.0-6.5
Lamps, 4 x 860W CDM plus one HPS thouie (helps explain high room temps and EC, as the light output from CDM is dramatically different from HPS)

Per plant yield; most recent crop 19 zips per plant average. This is the best yet of an ongoing upward trend.

I spray weekly with a foliar nutrient (processed kelp), Safer Soap and depending on the stage, milk, Green Cure and/or potassium silicate to raise leaf pH.
 
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