I am in need of advice. I live in CA, and I bought a new model home a few years ago. I had issues with my HVAC split system a few weeks ago. My home is two levels at a total of 2500 sq ft. My AC Heating is a 5 ton unit, which you all know produces 2000 cfm, but I only have one 20 x 30 return of 1200 cfm on the second floor. There is no return on the first floor and it gets very humid at night. It's going to be impossible to have a return on the first floor now.
Do I have any grounds of making my home builder install a second return? Is there a construction standard on how duct work is installed? What facts can I use to back up my claim?
Thanks for your assistance.