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.
Let's assume a home requires 80 million BTUs of heat per year and is heated using a furnace with an AFUE of 90 percent. Here, propane cost equals ($1.87/92,700) x (80,000,000/0.90), or 0.00002017 x 88,888,889. In this example, annual propane heating costs would be approximately $1,793.