Geothermal units reduce maintenance costs as well-

“Durability: Geothermal heat pump systems have relatively few moving parts. Because those parts are sheltered indoors, the systems are durable and highly reliable. The underground piping often carries warranties of 25 to 50 years, and the heat pumps often last 20 years or more.”

https://bgesmartenergy.com/residential/heating-cooling/geothermal-heat-pumps