Anyone trying to decide on the AC systems for a coach purchase needs to recognize that what might be comfortable for some may not be for others and that is likely why there are choices.

Both my wife and I are very uncomfotable in heat. Heat to me is defined as anything over 72 degrees. And I want cold air blowing on me while I drive. I have an aunt and uncle that will wear a coat if the temperature drops into the seventies and they set the AC in their house at 85. If they were part of this discussion you would think one roof air would be all that was needed.

So everyone here is providing their evaluation of the AC systems based on their perspective and they are all correct.

There is one recurring theme here that needs to be understood. From reading the posts it could be thought that having ample AC capacity means everyone in the coach is going to be wearing blankets or coats. The reality is that no matter how much cooling capacity a coach has, and in whatever form it takes all systems are controllable and once the desired temperature set point has been reached the AC units cycle on and off to maintain temperature. What has not been stated here and needs to be recognized is each system is likely ducted differently so in addition to being able to maintain a given temperature the AC system needs to be able to disperse its cooled air in such a manner as to not have hot or cold spots.

I have no clue whatsoever about how roof airs or installations other than my Liberty work, but I do know my OTR is superior to the Cruise Airs in cooling without having hot or cold spots in the coach. For example, my front Cruise Air moves a lot of air around the living room (salon for rich folks), but there is one spot on the passenger side sofa where the cold air blows directly on you. The other Cruise Airs and other places in the coach are OK, so give some thought to the cooling systems with respect to distribution but do not worry about having excess capacity. It is like horsepower. You only pay for what you use.