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I am looking at ductless split systems for use in my church and have been talking to my cooling tech. What we are looking for is a simple, high capacity, high EER non-invertor type unit, that may also provide heating. We will be using wall mount indoor units. It seems the EER ratings on most new equipment are pretty dismal, typically below 10, which is worse than a decent window unit. We want the high EER, not SEER, because the unit will essentially be running at full capacity or off (since it will be technically very undersized), so the EER rating really matters for energy cost. In addition the building has very limited electrical capacity. We will be working to upgrade the lighting efficiency to free up power for the air conditioning and to cut the cooling load. Non-invertor units also should be easier and cheaper to maintain due to the simplicity. Something with wall mount units capable of a minimum of 3 tons and are quiet are needed.
If we do go to an invertor type unit it looks like the Mitsu City Multi is the best bet, with EER ratings around 15, allowing use to run 6 tons on only 12.2 amps(230v), with COP's near 4 for heating.
Your suggestions would be appreciated
The Steam Whisperer (Formerly Boilerpro)
Chicago's Steam Heating Expert
Noisy Radiators are a Cry for Help
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