Anyone Know About Ductless AC Systems Like The Mitsubishi Mr Slim? - HVAC - DIY Chatroom Home Improvement Forum

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Old 03-24-2009, 08:42 AM   #1
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Anyone know about ductless AC systems like the Mitsubishi Mr Slim?

I have an attic space I'm finishing off to make it habitable year round. I do have room to put in ducting in the eaves of the a-frame roof but I don't think the capacity of my current system is enough to cool it. My blower is in the basement and I'm already cooling about 1200 sq ft on the first floor. I've been told that the most realistic option is to add a second unit for the attic. I've been thinking about the ductless systems like the Mitsubishi Mr. Slim as a good option. I need to cool about 650 sq ft.

I know some people who use these things in tropical areas to cool large rooms and they seem to work well. Plus, you can't beat the price over a new HVAC system. I don't think I'll ever need to heat my attic as it's insulated pretty well and I live in the south. During the winter, my prediction is that enough heat will escape from the first floor to keep it cozy.

Anyone have experience with these types of AC systems? I don't want to use a window unit because it will obstruct one only two windows that I have up there.


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Old 03-24-2009, 07:51 PM   #2
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They work very well. Fujitsu makes the most efficient ones as they have a variable speed ECM compressor. All of Asia and LOTS of Europe have these units and they are not cheap to install. Make sure your contractor has installed 2 dozen or more and is reputable.


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Old 06-17-2009, 09:58 PM   #3
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Yuri - I am in Winnipeg and am interested in this product. Can you advise me on the proper model for my 100 year old home?
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Old 06-19-2009, 09:50 AM   #4
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Some of the Fujitsu models are heat pumps and can provide heating as well as cooling.
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