Did good job on insulating the room addition and and makeing an excess panel to that put of room. Still need to check one duct vent in bedroom still not working right ?
I use to turn my thermostat to 68 to reach a tolerable temperature on the first floor. Forget the upstairs - I put a window or portable A/C unit in just so I could work upstairs in my office. Now I can turn the main thermostat to 74 - 76 and the first floor is very comfortable - even during these days with a heat index of 95 (+).