We thought that we would be able to keep our unit off during these last few months. In order to lower the cost of our bill and to just get everything in order. Well, mother nature has another idea and with the temperature being in the 60's and below. That calls for the heat to constantly be on in some fashion. What really runs up my bill is having the unit on through the night because it is so cold that leaving it off for 30 minutes is horrible. Is the cold weather driving your bill sky high?