What did the load calculation state you needed. You didnt research enough, you had a 1 ton AC before and now have 3.5 ton AC, if that 1 ton cooled your home at all decently you have just left yourself with a future of an uncomfortable home in summer, it will be very humid and clammy. ACs should be sized to run nearly 100% on your hottest day, humidity removal all summer cant be achieved on an oversized unit. My AC is oversized and it sucks so bad I run 2-Two dehumidifiers, I insulated after the instal so it was my mistake. If you read and learned you would of had a load calculation done and followed what it said on sizing. Global warming, think insulation.