Aluminum is the most abundant metallic element in the Earth's crust. Bauxite ore is the main source of aluminum. Aluminum is used in automobiles and airplanes (36%), bottling and canning industries (25%), building and electrical (14%) and in other applications (25%).
A: The average propane consumption per year for whole-house heating is estimated to be between 1200 and 1500 gallons per year for a 2,200 square foot home. However, the amount of propane a household uses varies depending on its specific uses in the household.
Current electric charges in the area are about 15Â¢ per kWh, natural gas is about $1.40 a ccf, propane is about $3.00 a gallon, and oil is about $3.20 a gallon. The annual cost to heat a 2200 square foot existing house of average energy consumption for different combinations of fuels and furnaces: 1  Natural Gas in an 80% furnace: $1215. 2  Natural Gas in a 92% furnace: $1095. 3  Oil in a 70% furnace: $2185.  Oil in an 80% furnace: $ 1 2004. Propane in an 80% furnace: $3143.  Propane in a 92% furnace: $2632.