The 60hz 110v ones might be but it hasn't been that way with 50hz 230v/400v for some time.
As it's such a local market and not international there is maybe no pressure to do it.
You are actually hammered with some stuff being 60 hz/110v. Nothing is developed for your currents and it's almost a by the way it sort of works but doesn't really.
Note that most residential A/C units, which are part of a centralized heating & cooling system in the US, are run on 230 volts. Now the circulating fan which moves the air throughout the house might be running on 110, but the compressor is almost always 230 volts.
Most residential units are sealed compressors, located within the high pressure tank. And are on-off type.
Granted that window units are 110VAC, but whole house units are 230VAC.
The issue is, it is very difficult, and expensive to have a device that most AC contractors don't specify (whole house units). The will only sell you what they want to sell (from there inventory, or sales office).
Likely that is why heat pumps are so costly, and hard to find service.
It was the same issue with gas AC units in the past. Yes they made gas AC compressors.
Probably why gas dryers are not that common. But the people that have them are happy.
New York’s Public Housing May Be On The Verge Of A Climate Breakthrough
In the 1990s, the nation’s largest public housing authority helped popularize energy-efficient refrigerators. Now it’s ready to do the same for heat pumps.
I am tending towards inverter multisplit. They are claiming 30% energy reduction compared to the stop start AC driven compressors. Just have to find a 3 phase version.
Well they are mostly single phase 30 amp supplies for the 4-5 fancoil units.
My mains supply is a 22kw 32 amp 3 phase so a 30amp load on one phase will give potential of the main fuse will blow when the other 3 phase stuff is running.
I am sure there will be one I haven't put to much effort in yet. I will go and see the Daikin dealer and they will more than likely have one just hidden away in the industrial section.
