Right choice of AC unit/type/ton?
After months of research and hordes of scammy salespeople, I think I've chosen the right contractor and the right unit. According to my printed load calc (thank you, Garden Websters!) I read: apprx 1600 sq ft.with total gain/loss 39,305 = 5 ton unit. Replacing broken 4 ton 15yr old Carrier 3-Phase on the westside of house (on ground, in Phoenix)with Carrier 48ESA600905A,also 3-Phase 13 SEER/11 EER, placed on roof; 2 new 30x14 return air grills in main living areas (old system is 1 small return in hallway); new gas flex and some new duct work/connections in attic. $6505. I've lived in house for 10 years and have never had a comfortable summer. Do y'all think I'm making an OK - or maybe even great choice? Hoping to install day after tomorrow, but would like a blessing! Shout out to Randy, who pointed me to GardenWeb, and all the generous spirits here!