It's a 1980 17'. Not a 4 season model, (only 1" of Styrofoam in the walls, ceiling and floor) and no double pane windows. We've had it for 9 years. Camped from Durango to Dayton & Duluth to Orlando and many points in between.
We use our Bigfoot all year in Texas. We've camped when the temperature is still 95 degrees at 10 p.m. We've never had a problem with the air conditioner keeping it cool inside.