Never Again!| DO not buy this product. NOT energy efficient!!! This product did not work for me. It would not hold the settings. I used it for three months...I gave up on the settings and tryed to use the "hold" setting, which would reset itself back to factory settings over and over...changed the batteries twice to make sure that was not the problem...My power bill was double and tripled what it usually is! Usually about $150 during the winter months...it was up to $250 for 2 months and over $330 one month!!! I was mad to say the least. I went back to a nonprogrammable unit (by Honeywell)about three weeks ago. My power bill is back to the normal for April of $81.