What Are the Different Types Of Heat Pumps?
A heat pump is a highly efficient heating and cooling system that transfers heat from one place to another rather than generating it directly. The main heat pump types include air-source, ground-source (geothermal), , ductless mini splits, hybrid systems, and air-to-water heat pumps, each designed to optimize home efficiency and indoor comfort. Below, we break down the different heat pump types to help you confidently select the system that best meets your needs.
How Do Air-Source Heat Pumps Work?
Air-source heat pumps transfer heat between your indoor space and the outside air. During the winter, the air-source system extracts heat from the cold outdoor air and pumps it indoors; during the summer, the system reverses the process to act as an air conditioner. Learn more about how a heat pump works.
According to industry benchmarks, air-source heat pumps are the most common heat pump type due to their relatively low installation costs and high versatility. Modern advancements in compressor technology mean that today's air source cold climate heat pumps operate efficiently even in sub-freezing temperatures, providing resilient performance when customers need it most. Air-source heat pumps are better suited for homeowners looking for a cost-effective, easily integrated solution to replace traditional furnaces and air conditioners. The system integrates seamlessly with existing ductwork, delivering clean, energy-efficient comfort that keeps people safe and comfortable.
What Are Ground-Source (Geothermal) Heat Pumps?
Ground-source heat pumps, also known as geothermal heat pumps, achieve climate control by transferring heat between a building and the earth or a nearby water source. Because underground temperatures remain relatively constant year-round, geothermal systems are incredibly efficient and reliable in extreme climates. Learn more about what is geothermal heating and cooling.
While geothermal heat pumps require a higher initial investment and more complex installation processes, the long-term energy savings and environmental benefits are impressive. The ground-source system utilizes a series of underground pipes, called a loop, filled with a refrigerant or water solution. Geothermal heat pumps work best when property owners have adequate land space and seek the highest possible operational efficiency and lowest carbon emissions over a lifespan of 20 to 50 years. This technology embodies a bold vision for a sustainable future, optimizing buildings for maximum energy efficiency.
How Do Ductless Mini-Split Heat Pumps Function?
Ductless mini-split heat pumps are a variation of air-source technology that deliver heated or cooled air directly to specific zones or rooms without the need for traditional ductwork. The mini-split system consists of an outdoor compressor connected to one or more indoor air-handling units via small refrigerant lines. Learn more about how a mini split works.
Ductless mini-split heat pumps are better suited for older homes lacking existing ductwork, room additions, or spaces requiring individualized temperature control. By eliminating the energy losses typically associated with ductwork (which can account for up to 30% of energy consumption1) mini-splits offer precise, hyper-efficient comfort. This targeted approach to climate control empowers customers to customize their indoor environment, ensuring that energy is only used where and when the customer needs it most.
What Are Dual Fuel (Hybrid) Heat Pumps?
Dual fuel or hybrid heat pumps combine an electric air-source heat pump with a secondary heat source, typically a gas or oil furnace, to maximize energy efficiency across fluctuating winter temperatures. The dual fuel heating system automatically switches between the electric heat pump and the fossil fuel furnace depending on which is most economical at a given outdoor temperature.
In the pursuit of reliable, intelligent home solutions, dual fuel heat pumps offer the ultimate peace of mind. During mild winter conditions, the electric heat pump provides efficient, sustainable warmth. When temperatures plummet and the heat pump's efficiency drops, the backup furnace seamlessly takes over. Dual fuel heat pumps work best when homeowners live in regions with highly variable winter climates and want to bridge the gap between complete electrification and reliable extreme-weather performance.
What Are Air-To-Water Heat Pumps?
An air-to-water heat pump transfers heat from outdoor air into water for home heating, cooling, or hot water. It uses a refrigerant cycle to absorb heat from the air and moves it into a water-based system like radiators, underfloor heating, or a storage tank. In summer, the process can reverse to provide cooling.
These systems work best in moderate climates and in well-insulated homes with low-temperature distribution systems, such as radiant floors. They’re especially effective for homeowners looking to improve energy efficiency and reduce reliance on fossil fuels while maintaining consistent indoor comfort year-round.
How Do You Choose Between the Different Heat Pump Types?
Ashley Davis, owner of Lawson Air Conditioning and Plumbing in Gainesville, Georgia, explains that choosing the right heat pump depends on several home- and lifestyle-specific factors rather than a one-size-fits-all solution.
“Your local climate, your home comfort goals, your energy efficiency expectations, and your budget all play a factor,” Davis said. “You also have to consider the condition of your ductwork and how much space is available to install HVAC equipment.”
- Air-Source Heat Pumps are better suited for teams and homeowners seeking an affordable, highly effective replacement for aging HVAC systems in moderate to moderately-cold climates.
- Geothermal Heat Pumps work best when long-term ROI, maximum efficiency, and extreme climate resilience are the primary goals, provided there is land available for ground loops.
- Ductless Mini-Splits are better suited for spaces without ductwork, home renovations, or customers prioritizing room-by-room temperature control.
- Hybrid Heat Pumps work best when homeowners in freezing climates want the environmental benefits of a heat pump but the guaranteed backup power of a traditional furnace.
- Air-to-water heat pumps are better suited for milder climates and in well-insulated homes that use low-temperature heating systems, like radiant floor heating.
1 https://www.energystar.gov/saveathome/heating-cooling/duct-sealing
Frequently Asked Questions
Ground-source (geothermal) heat pumps are the most energy-efficient heat pump type. Because geothermal systems utilize the earth's stable underground temperature, the system requires significantly less electricity to heat and cool a building compared to air-source models.
Yes, modern cold-climate heat pumps are designed to operate efficiently in freezing temperatures. Advanced compressor technology allows the air-source system to extract heat from the outside air even when temperatures drop well below zero degrees Fahrenheit.
No, you do not need existing ductwork to install a heat pump. Ductless mini-split heat pumps are specifically designed to provide localized heating and cooling directly to individual rooms without the need for a central duct system.
Air-source and ductless mini-split heat pumps typically last 15 to 20 years with proper maintenance. Ground-source heat pumps have indoor components that last up to 25 years, while the underground loop system can last over 50 years.
About The Author: Travis Baugh is a Digital Brand Marketing Manager for Carrier, where he develops informative, straightforward content to help homeowners better understand heating, cooling, and indoor air quality. His writing is focused on empowering homeowners to make confident, well-informed choices about their home comfort systems.