Feature / Benefit |
Ground Source Heat Pump |
Air‑Source Heat Pump |
Heating Efficiency |
⭐ Extremely high — uses stable underground temperatures for peak performance |
Varies with outdoor air; efficiency drops in extreme cold |
Cooling Efficiency |
⭐ Very high — ground stays cool even in summer |
Good, but performance decreases during heat waves |
Cold‑Climate Reliability |
⭐Excellent — unaffected by outdoor temperature swings |
Moderate — may require backup heat in very cold climates |
Operating Costs |
⭐Lowest long‑term costs due to high efficiency |
Lower than gas, but higher than geothermal |
Installation Cost |
Higher upfront due to loop field |
Lower upfront; simpler installation |
Lifespan |
50+ years for ground loop, 20–25 years for heat pump |
12–18 years on average |
Maintenance |
Low — most components are indoors and protected |
Moderate — outdoor units exposed to weather |
Noise Level |
Very quiet — no outdoor compressor |
Outdoor unit generates noticeable noise |
Environmental Impact |
⭐ Excellent — uses renewable ground energy |
Good — still efficient but weather‑dependent |
Space Requirements |
Needs yard space for loop or drilling |
Requires outdoor unit placement |
Fuel Source |
Electricity only — no combustion |
Electricity only — no combustion |