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-   -   Mini-split ceiling cassette system (http://www.diychatroom.com/f17/mini-split-ceiling-cassette-system-170403/)

ARB 01-28-2013 06:33 PM

Mini-split ceiling cassette system
 
Hey all,

Iím going to be finishing a 500 sq ft space on the second floor of my garage and attaching it to the house. A builder suggested a mini split system for heat and A/C (Iím located in CT), and it seems like this would be a sensible solution. After some research and looking at options online, the single-zone Mitsubishi 12K BTU ceiling cassette system is my top contender. (SUZ-KA12NA.TH + SLZ-KA12NA.TH)

It seems that there isnít a ton of reviews/opinions published about ceiling cassette systems in general, let alone the Mitsubishi ones specifically, so I was curious if anyone had any experience or opinions on this. I would also welcome any installation or setup tips or potential problems to look out for. There will be plenty of room above the unit and the ceiling will be drywalled.

I do understand that these are a bit more expensive and are not as easy to install as the wall-mounted models, but Iím willing to make those concessions.

Thanks in advance for any advice, tips, or opinions! :thumbsup: Also, does 12K BTU sound about right?

beenthere 01-28-2013 06:43 PM

Make sure it will still heat at your design temps. many stop heating at 0 or -13.

ARB 01-29-2013 07:28 PM

Quote:

Originally Posted by beenthere (Post 1104366)
Make sure it will still heat at your design temps. many stop heating at 0 or -13.

Yes, I believe this one heats down to -13... Thanks!

Any other thoughts/advice?

wetech 01-30-2013 01:03 PM

Quote:

Originally Posted by ARB (Post 1104358)
Thanks in advance for any advice, tips, or opinions! :thumbsup: Also, does 12K BTU sound about right?

no way to tell without doing a load calc. For $50 you could try something like HVAC Calc and get a good idea of what the load is. Could save you a few $100 on equipment.

Patrick Eubanks 01-31-2013 08:37 AM

ceiling casette
 
I have installed a few mitsu. ceiling casettes and had absolutely no problems. Mitsubishi is good stuff.

ionized 01-31-2013 06:39 PM

I think that they are not as efficient as the high wall units either, but the look is certainly different.

Patrick Eubanks 01-31-2013 07:27 PM

load
 
If its rated for below zero it is probably an inverter system therefore pretty darned efficient. 12,000 BTU sounds just right. I might even contemplate an 18,000 BTU unit for those hard to heat nights. The inverter will allow it to pace itself for inside load conditions.

ARB 02-02-2013 02:27 PM

Thanks for all the feedback, guys... :thumbsup:

I do plan to work with an HVAC professional on this to ensure proper sizing and installation; I just wanted to do some advanced research and homework. Thanks again!

ionized 02-04-2013 12:00 PM

Quote:

Originally Posted by Patrick Eubanks (Post 1106693)
... therefore pretty darned efficient.

The high wall indoor boxes are the most efficient (COP/SEER) judging from the manufacturers' numbers. The short-ducted and ceiling boxes are just not up to the same level for some reason.

Quote:

Originally Posted by Patrick Eubanks (Post 1106693)
The inverter will allow it to pace itself for inside load conditions.

This is not an issue for the OP, but the outdoor/compressor sections for multiple indoor equipment can't run a single indoor unit to as low a level as the 1:1 systems according to the data I have seen. They are just bigger so it is inherent. That might be something to keep in mind when installing a system with one single and a multi and you can choose where to put the single system -- where it might be running at low levels a lot of the time. (Think bedroom at night.)

AirstarFilters 02-09-2013 01:35 PM

Fujitsu with their 7/5 warranty may present a competitive alternate, think they start at 18k though in cassete, not 12k in single zone

ionized 02-09-2013 06:02 PM

Wow, that is huge considering that other brands have residential equipment as low as 5000 and 6000.

beenthere 02-09-2013 06:11 PM

Quote:

Originally Posted by ionized (Post 1113455)
Wow, that is huge considering that other brands have residential equipment as low as 5000 and 6000.

In a ceiling cassette?

AirstarFilters 02-09-2013 09:13 PM

9k is the smallest mini-split in a single zone, not cassette...wall mount


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