Question about an A/C Unit in a Sealed Room

[Dionysus_Tokes]

What up IC.

This is my first post on this forum after lurking for a week and I am ready to ask some questions.

I ran the numbers on calculating BTU's in a 360 sq ft garage (w/out a sun facing wall). I determined that a 36000 BTU A\C would be sufficient.

My question is do I use two (2) 18000 mini split A/C units or one (1) 36000 unit.

My initial instinct is the 2 units. It covers a larger area and saves a couple/few hundred dollars that can be budgeted out else where. But since I have no experience in the matter. I am looking for some guidance.

 

[Granger2]

Two units also might save your ass if one goes out. You can put them apart and get better distribution of cold air. Good luck. -granger

 

[Dionysus_Tokes]

Two units also might save your ass if one goes out. You can put them apart and get better distribution of cold air. Good luck. -granger

I didn't think about that. Wouldn't matter what BTU's you have covered if it crapped out for some reason. Thanks.

 

[Dionysus_Tokes]

So what is the difference a Amvent 1.5 ton Mini Split and a Mitsubishi Single Zone? The one is $1100 and the latter $2000.

Why the huge price jump when they both cover 18000 BTUs?

 

[HenDokuYaku]

Mitsubishi Mr. Slim mini splits are the top ranked minis around. There are a lot of reasons that makes that price difference very reasonable. Feel free to search on Mr. Slim here and you will find out more than enough info.

 

[the gnome]

i didn't look into the specifics of the 2 you mentioned but 1st thought is quality.
mitsu's are the bmw's of mnini splits compared to the other brand you mentioned,
btw, never heard of amvent.

i started with my 32,500btu mr slim for 280sqft.
the room was 14x20ft, even thought its sized with a little extra btu/headroom for 6000w open hood, the blowers on mini's can't throw the air 20ft reliably, especially with all kinds of stuff hanging from the ceiling,
soooo i was always warmer at the far end of the 20ft run.
my main concern for getting the 24,000btu breeze was for back up insurance.
with the amount of weight/$$ i get every 2 months if my mr slim fugged up I'd be in a mess. $1800 for the friedrich breeze was dirt cheep insurance.
plus if i run both, no more hot spots and my ambient temps are only 1degree over set point on the stat

 

[Snook]

an inch or two of foam board framed onto the inside of that west facing wall and save a little heat but what are you calculating?

6, 1K vertical HPS? 1, 400W horizontal? idono. LEDs?

and.. welcome.

 

[Dionysus_Tokes]

Mitsubishi Mr. Slim mini splits are the top ranked minis around. There are a lot of reasons that makes that price difference very reasonable. Feel free to search on Mr. Slim here and you will find out more than enough info.

Mr. Slim, I am on it now. Thanks.

my main concern for getting the 24,000btu breeze was for back up insurance.
with the amount of weight/$$ i get every 2 months if my mr slim fugged up I'd be in a mess. $1800 for the friedrich breeze was dirt cheep insurance.

When you put it that way, it seems like insurance is always a must. Good looks.

an inch or two of foam board framed onto the inside of that west facing wall and save a little heat but what are you calculating?

6, 1K vertical HPS? 1, 400W horizontal? idono. LEDs?

and.. welcome.

Thank you. My initial build is four (4) 1k Gavitas and two (2) 600w MH. I plan to expand to six (6) 1k and then to eight (8) 1k over the course of six months. The 600w's are in a seperate sealed room.

I am wondering if 18000 BTU on opposite sides of the room are sufficient to cover the area when all eight light rigs are in operating order?

 

[the gnome]

you basic rule of thumb for cooling is 5000btu for every 1000w's of open bulbs
so if you plan on 8000watts of lamps you want a minimum of 40,000btu.
and personally I like a little extra headroom on the figures.

my backup minisplit is a friedrich, it's also a top quality brand,
its a 24,000btu ac/heat pump,
it has the quick connect lineset so no HVAC to install it.
you need 2 people for the install because of the precharged linesets
i had min up-n-running in 6 hrs.
a couple of those would give you 48,000btu and you would be well covered.
there's many ways to work the numbers and skin this cat
BUT
what i would do For Sure is run 2 mini's.
my ac bill actually went down because of the efficiency of running 2 units in the room

 

[Dionysus_Tokes]

you basic rule of thumb for cooling is 5000btu for every 1000w's of open bulbs
so if you plan on 8000watts of lamps you want a minimum of 40,000btu.
and personally I like a little extra headroom on the figures.

my backup minisplit is a friedrich, it's also a top quality brand,
its a 24,000btu ac/heat pump,
it has the quick connect lineset so no HVAC to install it.
you need 2 people for the install because of the precharged linesets
i had min up-n-running in 6 hrs.
a couple of those would give you 48,000btu and you would be well covered.
there's many ways to work the numbers and skin this cat
BUT
what i would do For Sure is run 2 mini's.
my ac bill actually went down because of the efficiency of running 2 units in the room

This is the route that I am going to follow. Thanks for the info.