Oil, gas, & two coal. 8 of the ten do use electric space heaters (sparcly) . Aprl 09 to the present. All of them are not in for january. All use some form of Air conditioning weather it be Central air duct or ductless, or window units. Some new (efficient) some old (not so efficent). 6 have electric water heater while the rest have steam heat so therefore the oil, gas, & one coal heat there water. All but two had Xmas lights outside. All have elecrtric stoves. Which makes no sense ? 3 have more than 1 refrigerator and one has 2 refrigerators plus a chest freezer. 2 had halloween light. One has a light pole outside. I have taken many factors into consideration.