Geothermal Heating and Cooling: Are Homeowners Still Happy?

For years, geothermal systems were celebrated for their significant energy savings. However, in the last twenty years, air-to-air heat pumps have caught up, challenging the traditional grounds for their continued adoption.

Current Trends: Air-to-Air vs. Ground Source Heat Pumps

While ground source heat pumps (GSHPs) still offer substantial advantages, the increased efficiency and reduced costs of air-to-air heat pumps have made the extra investment in a ground source loop questionable. If you are considering new construction or have the opportunity to install the ground source pipes without much disruption, it can still be a worthwhile investment.

However, a closer look at the market and technology reveals that air-to-air heat pumps have become cheaper and more efficient. They now offer savings over natural gas, especially given the tripling of natural gas prices over the last two years. For those currently using propane or heating oil, the switch to a heat pump is a no-brainer. It is strongly recommended that everyone planning to replace a furnace should consider getting bids for a heat pump and comparing the operating costs.

When to Consider Geothermal Systems?

While it is important to consider the efficiency and operating costs of both types of heat pumps, geothermal systems remain a top choice for those who need reliability and efficiency. After all, the future is all-electric, and heat pumps are significantly less expensive than resistance heating units. These systems have now become cheap and efficient enough to save more than natural gas.

Real-World Experience and Installation Success Rates

My experience in designing geothermal systems for over 25 years, spanning various facilities including residential, commercial, industrial, and large university campuses, highlights the reliability and success rates of these installations. We have recently designed a massive district heating/cooling system for a mixed-use development using all geothermal heat pumps. This development showcases the efficiency and reliability of these systems in providing heating and cooling solutions.

It is important to note that no installations of geothermal heat pumps have been unsuccessful. Additionally, there are concerns about added service calls and high maintenance costs, but these fears are largely unfounded in current installations. In our twelve-year-old rehab project, we have two air-to-air heat pumps, one for each floor. Over this period, we have had two maintenance calls per year and one instance where a fan needed lubrication to reduce noise. These systems have proven to be reliable and efficient.

For those considering a major purchase, thorough research and comparison shopping are essential. Understanding the relative efficiencies of the proposals you receive will help you make an informed decision about the most cost-effective and reliable heating and cooling solution for your home or building.

In conclusion, while the market for geothermal systems may have changed due to the advancement of air-to-air heat pumps, the reliability and efficiency of geothermal systems remain consistent. These systems are still recommended for those prioritizing long-term savings and energy efficiency. Always conduct thorough research and get multiple bids to ensure you are making the best decision for your needs.