12 seer
10 SEER
Just called York. I have this model, however York needed the serial number to find the SEER. Can a model have more than one SEER? I doubt it. My SEER for this model is 13.
The SEER rating on a York AC unit model TCGD 36S21S1s is a 13. The SEER rating stands for the seasonal energy efficiency ratio. The SEER ratio is something a person should look for when looking at AC units to purchase.
13 seer
13.0
your unit should be a 13 seer 3.5ton
Model number of indoor and outdoor unit needed to compile SEER rating.
13
10 SEER 4 ton
That is a 9 seer condenser
330