1. Number of installed Geothermal systems:
2. References from installed Geothermal systems from five years ago as well as 5 most recent installations: 
3. Will contractor provide you with a heat loss and heat gain calculation using “Manual J”?
4. Have your professional contractor explain a C.O.P.:
5. Type of training & how many employees are trained for Geothermal installation:
6. Will contractor provide you with a “D Super Heater”? (required for most rebates and tax credits):
7. Is the model of heat pump spect for your project ARI rated?: (required for most rebates and tax credits):
8. Ask your prospective contractor to explain the basics of how heat pump refrigerant systems work:
9. Inquire about equipment manufacturers and warranties: 
10. Is the contractor Licensed, Bonded & Insured: