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I was wondering if there are any window mounted split air conditioners in US market or anywhere else - One in which compressor and radiator hang out of the window and only evaporator is inside the room. I was able to pull up many patents from as early as 1938 with same idea but don't think a commercial product exist. Any thoughts why it could be so?

Here are some patents and more mentioned in their reference section:
https://www.google.com/patents/US6568201
https://www.google.com/patents/US2268451

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  • $\begingroup$ I'm a bit confused as to what you would use it for. Are you intending to run a split system with a window open? $\endgroup$
    – JMac
    Commented Sep 26, 2017 at 20:35
  • $\begingroup$ from the patent "object of this invention is to provide a conditioning unit having a portion passing through the window but arranged .. to permit the window to be fully closed or fully opened without .. moving the conditioning unit away from the window" Not a bad concept, but I would suppose the free market has not provided demand for such. Undoubtedly it would cost significantly more than a compact window unit $\endgroup$
    – agentp
    Commented Sep 26, 2017 at 23:57
  • $\begingroup$ Idea is to keep the window unblocked. Traditional window units blocks the window. Here is a similar patent from Whirlpool filed in 2001 google.com/patents/US6568201 Take a look at Fig 4 & 6 I wouldn't expect it be a lot more costly compared to a window a/c. An extra motor and some housing changes is all that it needs compared to window units. I would certainly buy one since I would love to keep my windows unblocked. $\endgroup$
    – Jean
    Commented Sep 27, 2017 at 14:08
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    $\begingroup$ There are in fact plenty of "portable" (google portable ac) units that use hoses to move air in/out. You could obviously pass the hoses through a window. (In fact folks do just that with windows that wont support a traditional unit). If you are thinking of actually splitting the unit and passing refrigerant lines through a window I think you'd have issues making a movable system sufficiently robust to contain the freon (My guess a pile of EPA red tape as well ) $\endgroup$
    – agentp
    Commented Sep 27, 2017 at 15:42
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    $\begingroup$ @Jean If you're going to permanently affix a unit, I don't see how it would be any easier to go through the window. The only difference between what you're proposing and a split system is that you want to run your piping through a window instead of through a wall. The thing is, now you have a window which is stuck ajar (or ajar and sealed). It seems like it would look a lot worse than running a regular split through the wall, mounted so that you don't even have to see the tubing. Technically you could buy a regular split unit and just run the pipes through the window if you really need to. $\endgroup$
    – JMac
    Commented Sep 27, 2017 at 18:28

2 Answers 2

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Yes, there are "saddle" or "hybrid" units which are basically as you describe. See, for example, the SoleusAir WS3-06E-201.

photo of SoleusAir air conditioner

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We rented one back in 1988 to cool our computer room so they definitely make them. The coolant tubes were about 30 feet long and as flexible as hose pipes. I don't know if they used gas or water as the coolant. But the outdoor side was hung out of an open window.

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