Well, it has been one month since my new Lennox XP 19 Heat pump and variable speed furnace has been in use. I am surprised to find that it is using more energy than my 22 year old Lennox 6 SEER. The system is working great in terms of cooling, but the energy use is 18% greater and when adjusted for my hot tub power being turned off at the same install time, the difference is even greater. The t-stat settings have been the same as before and when I look at the high outdoor temp and take that into account for that increase in June’s energy use it is still baffling why the new Lennox is more of a energy hog. Nothing else in the house has changed. The figures below came from my power company. I installed the new dual fuel system on May 30, 2008.

Is it possible that something is set up wrong? Thoughts?

Date, Total kWh, Max Outdoor Temp
06/26/08, 116, 88
06/25/08, 119, 93
06/24/08, 108, 86
06/23/08, 94, 84
06/22/08, 106, 86
06/21/08, 109, 86
06/20/08, 85, 83
06/19/08, 121, 86
06/18/08, 90, 84
06/17/08, 80, 82
06/16/08, 96, 78
06/15/08, 98, 82
06/14/08, 97, 86
06/13/08, 122, 82
06/12/08, 108, 85
06/11/08, 116, 88
06/10/08, 110, 84
06/09/08, 114, 74
06/08/08, 113, 87
06/07/08, 149, 87
06/06/08, 100, 83
06/05/08, 100, 85
06/04/08, 107, 88
06/03/08, 105, 89
06/02/08, 110, 81
06/01/08, 99, 88
05/31/08, 98, 89
Install Date
05/30/08, 112, 88
05/29/08, 93, 84
05/28/08, 83, 72
05/27/08, 99, 78
05/26/08, 134, 81
05/25/08, 147, 89
05/24/08, 100, 78
05/23/08, 92, 78
05/22/08, 96, 71
05/21/08, 98, 75
05/20/08, 109, 73
05/19/08, 115, 83
05/18/08, 126, 79
05/17/08, 122, 86
05/16/08, 93, 78
05/15/08, 96, 70
05/14/08, 87, 68
05/13/08, 105, 77
05/12/08, 94, 75
05/11/08, 82, 64
05/10/08, 96, 63
05/09/08, 91, 66
05/08/08, 100, 73
05/07/08, 95, 69
05/06/08, 101, 75
05/05/08, 85, 76
05/04/08, 97, 70
05/03/08, 71, 61
05/02/08, 83, 72
05/01/08, 126, 82
04/30/08, 91, 80
04/29/08, 62, 64
04/28/08, 69, 54
04/27/08, 76, 59
04/26/08, 63, 63
04/25/08, 73, 72
04/24/08, 100, 74
04/23/08, 93, 76
04/22/08, 103, 74
04/21/08, 79, 78
04/20/08, 109, 78
04/19/08, 96, 65
04/18/08, 82, 61
04/17/08, 78, 67
04/16/08, 64, 75
04/15/08, 67, 71
04/14/08, 75, 57
04/13/08, 81, 49
04/12/08, 68, 43
04/11/08, 64, 49
04/10/08, 62, 69
04/09/08, 68, 57
04/08/08, 69, 48
04/07/08, 62, 57
04/06/08, 118, 69
04/05/08, 112, 64
04/04/08, 74, 59
04/03/08, 78, 50
04/02/08, 72, 59
04/01/08, 74, 49
03/31/08, 100, 74
03/30/08, 95, 61