Does anyone have any experience with the new XDX technology from Carrier. It is offered as an option on their Russell Evaporator coils. It is a device that goes in the line feeding the coil, after the TEV, that supposedly causes the refrigerant flow to form rings inside the tube, thereby providing optimum heat transfer. This was demonstrated at the AHR expo in Chicago. The advantages are higher efficiency and fewer defrosts. I would like to know if anyone has seen these units in operation and do they work like they are supposed to? The website is www.xdxusa.com