Air conditioning in new 5th Wheel

Remember that Grand Design boasts a roof R-factor of 40. That's a gross misrepresentation. They manipulate numbers and materials to claim R-40 So the thing to remember is you're in a tin can in the heat of summer. You can do other things to help as others have said. We try to find camping spots that are shaded and keep the shades drawn if the sun is shining in. We also fill the 14" vents with Vent Pillows that have a reflective foil on one side. They also keep the room dark when the sun comes up early. If all else fails, we opt for Popsicle's and the pool.