Geothermal systems are often considered to be more efficient than central air systems. Geothermal systems use the natural heat of the earth to heat and cool a home, which is more efficient than using electricity or gas to power a central air system. Additionally, geothermal systems are more reliable and require less maintenance than central air systems. They also tend to last longer and have lower operating costs. However, geothermal systems require a significant upfront investment and may not be suitable for all homes. Ultimately, the best option for a home depends on the individual needs and budget of the homeowner.