I own an older house with a hot water heat system and I am want to get a Split AC system installed. The setup involves 2 9,000 BTU units, one in each 2nd floor bedroom and a 12,000 BTU unit on the first floor. I am on the fence between the Bryant Legacy system and the Evolution system. I would feel better about paying a premium for the evolution series if I could figure out the difference in efficiency. But I have not been able to find out that information. Both quotes point to the same condenser. So if the difference between the two is based on the condenser, than I might as well go with the cheaper quote. The more expensive units are quieter, but compared with a window AC unit both quotes are going to give me quieter cooling. Thanks.

I added the quote for the split ac units in case anyone is curious.

Quote for Split AC units

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    Personally I get suspicious (and look for brands that provide it) when I can't find the efficiency data that's supposed to be available. What I can say for sure is that in my comparisons the "one head to one compressor" systems all appeared to have better numbers than the "multi-heads to one compressor" systems. But differences between similar-looking systems can be quite large, which is why you want to have the actual numbers to compare.
    – Ecnerwal
    Mar 12 at 15:37
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    To get the efficiency then you will need to test both systems under the same conditions. I doubt you want to buy both so anything else will just be an "educated" guess that you won't know if you could have done better with the other.
    – Solar Mike
    Mar 12 at 15:54
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    Sounds like what is called a "mini-split"-- a single condensing unit feeding three air handlers each with its own evaporator coil. These are a lot more efficient than the old split system with a single air handler with duct work. Mar 12 at 16:07
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    You make several statements that are counter intuitive to me. The same condenser quieter is more expensive. (I have installed many styles and there is a reason for the $ difference) you really don’t care about the condenser if it is the same and unless going to a higher seer that part is usually the same. What you care about is the compressor and how it is driven. Inverter driven cost more and is quieter and is more efficient but is a mini split the right way to go? Do you have central heat? If you do a high efficiency compressor can be installed and cool the entire house, mini’s can do 1 room
    – Ed Beal
    Mar 12 at 17:17
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    @EdBeal I think OP is looking for a ductless system based on "I own an older house with a hot water heat system"
    – MonkeyZeus
    Mar 12 at 18:52

Is the Bryant website unavailable to you?

Taken directly from https://www.bryant.com/en/us/products/ductless-systems/

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  • For the compressor they quoted the middle line. I would prefer a 2 stage system. But if it costs between 30% and 50% more money, I guess I'll take the single stage system. It will work better than the window units that I have been using.
    – Gandolf989
    Mar 13 at 15:42

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