Some have asked that I keep track of Central Air vs. Window A/C electric usage. The central air was installed around the time we would have put in the window unit which was beginning of June. Our utility bills every 2 months so below is the kWh usage for both 2012 and 2013. Keep in mind that I needed to read the meter yesterday and estimated cost based on the cost for electricity in 2012. I will post actual most likely this coming week when I get the ebill.

05/08/2012 - 7/06/2012 = 1136 kWh --- $194.28
05/07/2013 - 7/06/2013 = 1202 kWh --- $205.00

The window a/c would cool and dehumidify only the living room and dining room, leaving the bathroom, two bedrooms, kitchen, and hallway to be desired. The central air cools and dehumidifies the whole house, including the finished laundry room in the basement. The central air is set for holding 75 degrees at this time. I have it programmed to keep 75 degrees when home and 78 degrees at sleep or work, but during the heat wave I placed it on hold.