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:

  • 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? – JMac Sep 26 '17 at 20:35
  • 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 – agentp Sep 26 '17 at 23:57
  • 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. – Jean Sep 27 '17 at 14:08
  • What do you mean by "unblocked"? Also, why is a regular split AC system not sufficient? – JMac Sep 27 '17 at 14:59
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    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 ) – agentp Sep 27 '17 at 15:42

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.

I am unaware of split system air conditioners that are made to be mounted into a window. I am only familiar withe split system air conditioners that are either wall, floor or ceiling mounted.

There are however, "box-in-the-wall" type refrigerative air conditioners that are manufactured to be mounted in windows. The following two picture are from the nymag.com website.

Window mounted air conditioner - example 1

Window mounted air conditioner - example 2

Other examples can be found in the Popular Mechanics website and the Frigidair website.

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