According to ARI, it is showing that the Btuh put out by the XL16i at 17 degrees is only 17,500 while while both the XL14i and XL15i are showing that the Btuhare in excess of 20,000 at 17 degrees. It showed my exact EER/SEER/HSPF ratings to be 11.40/15.25/8.75. Just for comparison sake, I looked at a couple of Carrier heat pumps and the 2 stage one puts out less Btuh than a single stage one although the 2 stage heat pump still manages to put out 20,000 BTU at 17 degrees. It almost looks like the single stage heat pumps have the capability to put out more BTU's at colder temperatures. Are these numbers on the ARI directory correct as the numbers that dan_sw_fl posted were higher?
I went ahead at changed the cph numbers for both second and third stage and will let you know the results. It still seems almost unbelievable that we had considerably lower heating bills with the old heat pump during the dead of winter compared to this new unit. Good thing electric rates are relatively cheap here in Ohio at 6.7 cents otherwise I'd easily be having $500+ electric bills with the XL-16i.