I had a York heat pump, which worked perfectly for the past 20 years. Electric bills were always low both in the summer and winter. However, I decided to upgrade to an American Standard, as the York unit was only a 12-seer unit. Just had the Heritage 15 Seer Unit installed a month and half ago, horrible!!! My electrical bill has gone up over $75.00, the air conditioning runs for 7 minutes, shuts off for 5 minutes, and then kicks back on for 7 minutes, all day long! There is nothing efficient with this unit. I went from an average of 1,200 Kilowatt-hours to over 2000 since this unit has been installed, and we've done nothing different in regards to the temp adjustments that we used with the York. The installer hasn't a clue, as does American Standard. This unit qualified for the $1,500 tax rebate, but that won't even begin to cover the increased cost of the operation of this unit by the time we file for our taxes in the spring of 2010! American Standard, how can you possibly lable this unit as efficient when it has almost doubled our kilowatt hours per month and kicked up our bill over $75.00!!!??? the worst choice we've ever made!