The air conditioning on our R-25 is sufficient for keeping the boat comfortable at night, actually making ice cubes between my toes night, and keeping the boat comfortable but not cool in the daytime.
We installed five shade screen brand, Window screens and insulated shades. We usually run with the hatches open underway, in the shade screens permit us to easily slide the shades into place when the hatches that are exposed to the sun. At night in moderate temperatures we open the hatch in the bunk and slide the screen in the place. As it cools during the night we can easily partially slide the shade in the place leaving a partial screen partial shade. They are magnetically linked together.
The shade screens match the color of the headliner, match the color of the boat, and looks like Ranger should've offered them as an option. They're really nice and not hard to install.
Anywhere from New England south there are occasional hot muggy days that reach out for Air Conditioning. As much as we like our Ranger, ventilation in the bunk is not very good. When the buggy, hot ,humid night surrounds our bunk and we are trying to go to sleep, the choice is turn on the air-conditioning or give up boating. For a boat in this price range there is really no choice. The air conditioning installation is well done and both the Air Conditioner and generator seem quite reliable.
I wouldn't leave home without