A geothermal heat pump can save up to 80 percent of the annual heating and cooling bills of a certain home in the north-eastern U.S. in this region, the yearly cost of conventionally cooling and heating a 2,000 square foot house is about $2,500. With a federal tax credit of 30 percent on the total installation of the system, how much can a homeowner afford to spend for a geothermal heat pump if the interest rate is 9 percent per year? The expected life of the heat pump is 15 years.
Please help 5 stars rewarded to whoever includes a "cash flow diagram", also please show clear steps