Bought a 3.5 ton Frigidaire 14 SEER to be installed next week. The install company verbally told me this is unit (FS5BD042K) . I looked up the specs of this unit and it seems to be a 13 SEER. Does Frigidaire 'up' the SEER rating from a 13 to a 14 if variable speed? Can they do this? Does not seem right to me. I saw the company's retail rate cards for both units (however did not note the model #'s at the time) with substantially different prices. I'm just worried they are going to install the 13 SEER when i'm paying for a 14. Can not find a whole lot of info about these new Frigidaire units, but was told they are very good. thanks for any comments.