I went to my local Goodman/Janitrol distributor and told them I wanted a 1.5 ton 12 seer heat pump. They gave me a model AR18-1 air handler to be matched up to a model cplj18-1 outdoor unit (which I have not installed yet due to new construction delays on the building. My customer calls me and says that the air handler will not provide a 12 seer rating. My local distributor was no help in giving me the info I need to satisfy my customer. The manager is out of town and they are extremely overworked due to the 100 degree temps we have had here in Dallas. Will that air handler give me a 12 seer rating with that outdoor unit? If not, what air handler model number do I need. Or perhaps I can go with a 13 seer outdoor unit and receive 12 seer? I checked the Goodman website and also ARI-net and found no info for the air handler that I have installed in this customer's house. Thanks for your help.