My fridge makes clear cubes. I never really thought about it! It may be more a function of water quality and pressure than the fridge itself.

Mine is an older KitchenAid. Don't suppose your friend would want it? It doesn't match my new kitchen, but I hate to dump a good fridge, especially now that I know it's special! :)

The only combo refrigerator/clear cube maker in the market is an undercounter piece made by U-Line, the CLRCO2175. I am not aware of any full size refrigerators that produce the clear cubes

My mother-in-law has the exact same Kitchen Aid refrigerator that I do. Her ice cubes are crystal clear. Mine are not. She has a reverse osmosis system that filters her water. I don't.
Maybe we're talking about a "different" clear, but results speak volumes to me.

As suggested, Ice clearity is a matter of water purity. It is the filter system that makes it "pure".

doesn't is depend on the amount of dissolved air (oxygen gas, nitrogen gas, carbon dioxide gas)? This turns into micro bubbles when the water is near freezing. The minute bubbles look make it look cloudy.

Seems to me the gasses you mentioned are clear.

tim - while you are correct that those gasses are clear, your analysis in the real world is flawed. Once those "clear" gas bubbles are captured in ice they reflect and refract even more light making the cubes "cloudy". It's beyond the scope of home water filters to remove gasses so I'm not sure you should consider those "impurities".

So, think about your conclusions. Pure water could still look cloudy depending on how its made. Joba has given a good synopsis of the mechanics of "clear ice"

Clear ice makers, by design, don't freeze the ice. U-Line does make a combo unit, but it's effectively a beverage center and a clear ice maker side-by-side in the same unit and sharing a compressor. The ice bin in a clear ice unit is insulated, but not refrigerated. The older ice in the bottom of the bin is constantly melting and being replaced with fresh ice. (For this reason, clear ice is also called "wet ice".)

This, plus the flushing action after each harvest cycle, requires a drain. All stuff that keeps the ice always fresh, but uses a lot more water. This is why restaurant/hotel ice is so different than the stuff you get from your fridge.

Basically, there is no way to put a clear ice machine in a fridge, because it needs to be separate. Also do be aware that clear icemakers are much noisier than regular residential icemakers - this is largely because of the different technique used to make the ice and is not particularly model-specific.

BTW, I have the CLRCO2075 (older version of the U-Line mentioned above) and it's moderately noisy but works well. Loud clunk during harvest, no one's getting around that. The water valve is LOUD during fill - definitely the most annoying noise it makes. Circulation pump's pretty quiet, only slightly louder than my Miele dishwasher. Recovery time on the fridge side is great - it maintains temperature in there much better than a "dorm fridge" even though it's a similar size of unit.