Heat pumps deliver a remarkably efficient alternative to conventional furnaces and air conditioners across nearly every climate zone. Much like a refrigerator in reverse, heat pumps rely on electricity to move heat from a cooler area into a warmer one — pulling warmth out of the cold outdoors and pushing it into your home. In warmer months, the process flips: the unit extracts heat from inside your house and sends it outside. Because heat pumps transfer heat rather than generate it, they can provide comfortable indoor temperatures while using significantly less energy than traditional systems.
Types of Heat Pumps
There are two primary categories of heat pumps connected to ductwork: air-to-air and ground-source (geothermal). These systems gather heat from the surrounding air or ground and funnel it into — or out of — your home. Because they absorb energy from ambient sources, heat pumps, gas-fired heat pumps, or the use of a burning heat source should be considered within context.
Air-to-Air Heat Pumps
Ducted Air-Source Heat Pumps
The most widely used style of heat pump is the ducted air-source unit, which transfers warmth between your living space and the outdoors. Today's generation of heat pumps can cut your heating electricity bill by approximately 50% compared to baseboard heaters or electric furnaces. High-efficiency heat pumps also dehumidify more effectively than traditional central air conditioners, delivering better energy performance and heightened comfort throughout the cooling season.
Air-source heat pumps have served homeowners across the United States for decades, but they haven't always thrived in extremely cold regions. In recent years, however, breakthroughs in air-source technology now position this style as a legitimate primary heating option in colder zones. Homeowners seeking to move away from a gas furnace can reduce upfront capital costs and ongoing energy bills, especially for those relocating from older heating units. For more information on upgrades, visit ENERGY STAR's Home Upgrade platform.
Consider making the switch to an ENERGY STAR certified heat pump for better efficiency and lower operating costs.
Ductless Air-Source Heat Pumps
Ductless air-source heat pumps deliver an efficient and flexible option for heating and cooling homes without existing ductwork. These systems are ideal for zone heating and can significantly reduce energy consumption compared to traditional heating approaches. Another option, the air-to-water heat pump, functions similarly to a ductless mini-split — providing warmth through radiant flooring or radiators, though it does not offer cooling.
Minisplit Heat Pumps
Minisplit heat pumps — a ductless air-source variant — are particularly effective for homes without ductwork, delivering an efficient alternative to baseboard heating. These systems can cut energy usage significantly, especially for zone-based heating. While other configurations, such as air-to-water heat pumps, exist, minisplits remain the most popular option for homes with radiant heating in regions such as New England and the Mid-Atlantic, where ducted systems are less prevalent.
- In warm climates (zones 1–4), approximately 60% of homes rely on furnaces, while heat pumps are used in 15%–25% of homes, especially mobile residences. Roughly 12%–25% of homes have systems without ductwork, which makes minisplits a practical choice.
- In colder climates (zones 5–7), furnaces are installed in the dominant heating systems — found in roughly 65% of homes. Heat pumps, while more efficient in certain scenarios, account for only about 3% of the primary heating systems in these regions. Additionally, roughly 32% of homes in these areas lack ductwork, making ductless solutions like minisplit heat pumps a practical option for those seeking to switch to more energy-efficient systems.
For homes with existing ductwork, replacing a furnace with a heat pump or installing a hybrid system is often easier. However, for homes without ductwork, minisplit systems are typically the best retrofit option. For new home construction, various configurations are available, but cost and specific climate conditions usually influence the choice.
Reverse Cycle Chillers
A specialty type of air-source heat pump called a "reverse cycle chiller" generates both hot and cold water rather than air — allowing it to be used with radiant floor heating systems in heating mode.
Geothermal, or Ground-Source, Heat Pumps
Geothermal heat pumps — also referred to as GHPs — achieve higher efficiency by transferring heat between your home and the ground. Because the installation cost of a geothermal system is notably greater than that of an air-source unit of comparable heating and cooling output, the extra cost may be recovered in energy savings within 5 to 10 years. Depending on the cost of energy and available incentives in your region, systems are typically warranted for 25 years for indoor components and 50+ years for the ground loop.
Geothermal heat pumps have multiple advantages. High-efficiency geothermal heat pumps, such as ENERGY STAR certified heat pumps, can use 61% less energy than a standard heating unit, are quiet and reliable, and suit numerous home environments.
A qualified installer or contractor can help ensure the highest efficiency levels from a geothermal heat pump system based on site characteristics and planned use, and can provide information about regulations or permits that might be required.
For more information, visit the Geothermal Technologies Office website and ENERGY STAR certified geothermal heat pumps.
Absorption Heat Pumps
Absorption heat pumps, also called gas-fired heat pumps, use heat or thermal energy as their energy source. They differ from compression heat pumps driven by mechanical energy and can be powered by various heat sources including natural gas, steam, solar-heated water, or geothermal-heated water. Absorption heat pumps are more complex and require larger units compared to compression-based heat pumps. The main advantage is their reduced electricity demand, which is limited to liquid pumping.
Advanced Heat Pump Technologies
Several innovations are improving the performance of modern heat pumps.
Staged or Multi-Speed Compressors
- Staged or multi-speed compressors let heat pumps operate close to the heating or cooling capacity needed at any outdoor temperature.
- These systems save energy by reducing on/off operation and compressor wear.
- Inverter-driven systems can modulate their speed and capacity at near-infinite degrees between low and high settings, running efficiently and maintaining consistent comfort.
Variable-Speed or Dual-Speed Motors
- Most newer models of heat pumps and furnace blowers are equipped with electronically commutated motors (ECM) or variable-speed or dual-speed motors on their indoor fans, outdoor fans, or both.
- Variable-speed controls for these fans keep the air moving at a comfortable velocity, minimizing cool drafts, maximizing electrical savings, and reducing noise and disruption.
Desuperheater
- Some high-efficiency heat pumps are equipped with a desuperheater, which recovers waste heat from the heat pump's cooling mode and uses it to heat water.
- A desuperheater-equipped heat pump can heat water 2 to 3 times more efficiently than an ordinary electric-resistance water heater.
Dual-Fuel or Hybrid Systems
A dual-fuel or hybrid system combines the efficiency of a heat pump with the reliability of a gas furnace. This combination allows the heat pump to handle most of the heating needs in milder weather, while the furnace takes over during colder temperatures.
- Energy Efficiency: During warmer months, the heat pump efficiently heats and cools your home. When temperatures drop, the system automatically switches to the gas furnace, which is better suited for cold weather.
- Shared Ductwork: Both systems typically use the same ductwork, making it a straightforward installation if you're upgrading from a traditional furnace and air conditioning setup.
- Widely Available: Commonly found in regions like the Mid-Atlantic, dual-fuel systems are easy to implement and help homeowners reduce electricity use in cold climates while maintaining comfort year-round.
This setup is a great option for homeowners looking to maximize energy savings while ensuring reliable heating in colder weather.
Cold Climate Heat Pumps
- Cold climate heat pumps are designed to perform in temperatures as low as 5°F.
- If you live in a region where temperatures regularly dip below freezing in winter months, consider looking for a system with an ENERGY STAR Cold Climate label.
- Learn more about ENERGY STAR Cold Climate heat pumps.
Conclusion
Heat pumps offer an energy-efficient and versatile solution for heating and cooling your home. With advancements in technology, they are now suitable for a variety of climates and applications. Whether you choose an air-source, ductless, ground-source, or advanced heat pump system, you can enjoy comfortable temperatures and energy savings.
Take Action
Upgrade to an ENERGY STAR certified heat pump to maximize energy efficiency and comfort in your home. For more information and to explore your options, discover our recommended Senville AURA mini split — built for powerful year-round performance.
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