CRD CRD Economic Analysis & Project Management 1 — Questions and Answers
Question 1: What financial metric compares the total lifecycle cost of a geothermal system against a conventional HVAC alternative over a specified period?
- Life Cycle Cost Analysis (LCCA) (Correct answer)
- Simple payback period only
- Gross domestic product index
- Loan-to-value ratio
Correct answer: Life Cycle Cost Analysis (LCCA)
LCCA accounts for installation, operating, maintenance, and replacement costs over the system's life to give a total cost comparison against alternatives.
Question 2: The US federal residential clean energy tax credit currently allows homeowners to deduct what percentage of qualifying geothermal heat pump installation costs?
- 30% of the total installed cost with no cap through 2032 under the Inflation Reduction Act (Correct answer)
- 10% up to a $500 maximum
- 50% but only for new construction
- 15% for systems installed after 2020
Correct answer: 30% of the total installed cost with no cap through 2032 under the Inflation Reduction Act
The Inflation Reduction Act extended and increased the residential clean energy credit to 30% of qualified geothermal heat pump installation costs through 2032.
Question 3: Which factor most significantly affects the simple payback period of a residential geothermal heat pump compared to a high-efficiency gas furnace and central AC system?
- The local cost of electricity versus natural gas and the heating/cooling load of the home (Correct answer)
- The color of the heat pump cabinet
- The brand of the thermostat used
- The number of bedrooms in the home
Correct answer: The local cost of electricity versus natural gas and the heating/cooling load of the home
Payback period is driven primarily by the energy cost differential between the geothermal system and the fossil fuel alternative it replaces.
Question 4: What is a common range for simple payback periods for residential geothermal heat pump installations in the US after applying federal tax credits?
- 5 to 15 years depending on local energy prices, load, and installation cost (Correct answer)
- Less than 1 year in all US climates
- 30 to 50 years making them economically unattractive
- Exactly 7 years for all installations
Correct answer: 5 to 15 years depending on local energy prices, load, and installation cost
After applying the 30% federal tax credit, most US residential geothermal installations see payback periods ranging from roughly 5 to 15 years depending on local conditions.
Question 5: When developing a project budget for a residential geothermal installation, which cost category is typically the largest single line item?
- Ground loop drilling and installation (Correct answer)
- Thermostat and controls
- Permitting fees
- Antifreeze fluid cost
Correct answer: Ground loop drilling and installation
Drilling and installing the ground loop typically accounts for 40–60% of the total installed cost, making it the dominant budget item.
Question 6: How does including utility rebates in a geothermal project's financial analysis affect the customer's net installed cost?
- Utility rebates reduce the net installed cost, shortening the payback period and improving ROI (Correct answer)
- Rebates increase the taxable income but do not reduce out-of-pocket cost
- Rebates only apply to commercial installations, not residential
- Rebates extend the payback period by increasing paperwork costs
Correct answer: Utility rebates reduce the net installed cost, shortening the payback period and improving ROI
Utility rebates directly lower the homeowner's net cost, improving the economics of the investment alongside federal and state tax incentives.
CRD CRD Economic Analysis & Project Management 1
What financial metric compares the total lifecycle cost of a geothermal system against a conventional HVAC alternative over a specified period?