I just added a 260sq ft room to my one store house. I now have approximately 2200 sq ft. I also have tons of windows in my house including
6 that overlook an outside atrium.Even before I added the room the AC starts running around 10:30am and does not shut off until about 8:00pm. For the most part it keeps the temperature around 81 degrees in the middle of the day. Cannot get it to keep it any cooler.
I have one return air vent in a central hallway that connects all the rooms. The room I just added is warmer than the rest.
I currently have a 3.5 ton unit. I was thinking about moving to a 5 ton unit but a friend told me without another return air vent I will not see much more cooling that I already have. I am looking to get the temperature down to about 78 degrees.
Any advice on how to proceed would be much appreciated.
Thanks in advance,
James