Looking to replace my existing 3 ton Ruud unit. Installed in 1989, it's seen better days. It was a high efficiency unit back then!
I have a buddy in the HVAC industry and we trade work for work. He has quoted me two similar systems at his cost. The first is a Carrier 38YRA036-3 with a FK4CNF005000 variable speed air handler. This is the R-22 unit.
According to Carrier's product data sheet, matching this AH with a 42-31 unit gets a 14 seer with a 12.10 eer and a seasonal efficiency of 8.20 but their ratings don't show the exact combination quoted. They do show a FK4NCNF003 that will get 13 seer, 11.25 and 8.0.
The second unit is a Carrier 38YXA036-3 with a FX4BNF036000 variable speed hair handler. This is the Puron unit. According to Carrier's own product data sheet, matching this AH with this units gets a 13 seer with a 10.75 eer and a seasonal efficiency of 8.5.
The R-22 unit is only a couple of hundred dollars less than the Puron unit and on the surface looks to be more efficient. Which is the better unit and why?