What questions should I ask potential GSHP installers?

Consider asking the following questions:


Will you determine my building’s heating and cooling design loads using ACCA Manual J for residential or Manual N for commercial, and size the equipment accordingly?

Qualifications and Experience

Can you provide documentation that you hold one of the following credentials?

  • International Ground-Source Heat Pump Association (IGSHPA) Accreditation;
  • Certification as a GeoExchange Designer (CGD) from IGSHPA; or
  • Professional Engineer (“PE”) License from the National Society of Professional Engineers

Can you provide references from previous customers with similar systems in my area?


Are you familiar with the application process for CMLP’s ground-source heat pump rebate and are you willing to complete the process for me?

Installation Process

  • When would you be able to perform the installation and how long will it take to complete?
  • Will you hire subcontractors to complete portions of the project? If so, what firms and what will they do?
  • How much advance notice will we receive before contractors arrive to do work?
  • Will you provide training for me on how to properly operate and maintain the system?
  • What warranty do you provide for the systems you install?

Show All Answers

1. What is a ground-source (aka geothermal or geoexchange) heat pump and how does it work?
2. What types of ground-source heat pumps and configurations are available?
3. What are the benefits of using ground-source heat pumps?
4. Are there drawbacks to ground-source heat pumps?
5. Is a ground-source heat pump right for me?
6. Why are ground-source heat pumps considered to be a clean heating and cooling technology?
7. Can ground-source heat pumps provide domestic hot water?
8. How do the annual maintenance costs of ground-source heat pumps compare to other heating systems?
9. How long do ground-source heat pumps last?
10. How complicated is installing a ground-source heat pump and how much time will it take?
11. What if I don’t have a lot of yard space?
12. How much will a ground-source heat pump cost?
13. Are there any state or federal incentives available for GSHP installations?
14. Are rebates available for ground-source heat pump installations?
15. How can I find a GSHP installer?
16. What questions should I ask potential GSHP installers?
17. Who can I contact if I have a question not answered in these FAQs?