Ground Source Heat Pump Design

Keep It Simple & Solid

These economics spreadsheets are provided at no cost to the public. We welcome comments and suggestions.

• EcoAnal-10-09.xls (36kB download) - Computes the economic value (Present Worth) of an Energy Conservation Opportunity (ECO) for a 10-year period.
• EcoAnal-20-09.xls (39kB download) - Computes the economic value (Present Worth) of an Energy Conservation Opportunity (ECO) for a 20-year period.
• EcoLoan-15-09.xls (33kB download) - Computes the economic value of financing an Energy Conservation Opportunity (ECO) with a 15-year fixed rate loan.
• EcoLoan-30-09.xls (42kB download) - Computes the economic value of financing an Energy Conservation Opportunity (ECO) with a 30-year fixed rate loan.
• EcoAnal-Tax-Dpr-5.xls (32kB download) - Computes a discounted 5-Year economic analysis with inflation, taxes, and depreciation.
• Mortgage09.xls (32kB download) - Computes the monthly and annual payments for a fixed rate mortgage.