I just did my Manual J.
HVAC-Calc gave me 91 degrees as the summer Design Temp (I'm in So Cal) but I'm thinking I need to use maybe 100 to make sure I have enough capacity when it gets that hot - which it does maybe 5-10 times a year.
Based on 100 degrees it gives me a heat gain of about 30K - a 2.5 ton. Most of the contractors have been quoting 3.5-4 ton.
Am I thinking about this correctly using 100 degrees?
Should I be looking at a 3 ton just to be on the safe side? I understand you don't want to oversize the AC but would 3 ton be oversized in this situation?
Thanks for any help!