In New England, the HVAC regs are different. We don't get the heat you do for the lengths of time you do so mine are 13.7 SEER. My contractor pointed out that in areas of the south they (manufacturers) can't sell anything below 16 SEER and in some areas, 17. My units have a label on the them that they're illegal to be sold in several states in the south. Ours are a little cheaper. I have Bryant, a division of Carrier. I wish I could have got Trane, but just out of my budget.