A centrally ducted air-source heat pump can work well in homes with suitable existing ductwork, while ductless mini-splits can be particularly useful in homes without ducts, additions, remodeled spaces, and individual rooms. ENERGY STAR recommends properly sizing the system using a load calculation rather than relying on simple rules of thumb. 0
This guide explains how to choose a heat pump for different types of homes and common residential layouts in the United States.
Quick Guide: Which Heat Pump Is Best for Your Home?
| Home Type | Heat Pump Configuration to Consider | Important Considerations |
|---|---|---|
| Small home | Compact ducted or single-zone mini-split | Avoid oversized equipment |
| Large home | Ducted or multi-zone system | Multiple zones and load distribution |
| Home without ductwork | Ductless mini-split | Indoor-unit placement and room layout |
| Home with existing ducts | Ducted air-source heat pump | Inspect duct sizing, leakage and airflow |
| Older home | Ducted or ductless depending on structure | Insulation and air sealing can affect sizing |
| New construction | Ducted, ductless or multi-zone | Design HVAC with the building envelope |
| Apartment or condo | Mini-split or compact ducted system | Outdoor-unit rules and electrical capacity |
| Two-story home | Multi-zone or properly designed ducted system | Temperature differences between floors |
| Home addition | Single-zone mini-split or compact ducted system | Avoid extending inadequate existing HVAC |
| Manufactured home | Heat pump designed for the home’s HVAC configuration | Available space, ducts and electrical service |
Why Home Type Matters When Choosing a Heat Pump
Two homes with the same floor area can require very different HVAC systems. Heat loss and heat gain depend on factors such as insulation, windows, air leakage, climate, building orientation and the home’s layout.
The U.S. Department of Energy notes that heat-pump sizing should account for the characteristics of the home rather than simply using a basic square-footage estimate. ACCA Manual J is commonly used to calculate residential heating and cooling loads. 1
The existing distribution system also matters. In homes with ducts, duct capacity and airflow can affect which heat pump can be used effectively. 2
1. Best Heat Pumps for Small Homes
Small homes generally have lower heating and cooling loads, so selecting a system that is too large can be a particular concern.
Depending on the layout, suitable options can include:
- Small centrally ducted heat pumps
- Single-zone mini-splits
- Compact ducted mini-splits
- Small multi-zone systems for several separated rooms
The most important consideration is not simply buying the smallest heat pump available. The system should be selected according to the home’s calculated heating and cooling loads.
See the best heat pumps for small homes.
2. Best Heat Pumps for Large Homes
Large homes may require more capacity, but installing one oversized heat pump is not automatically the best solution.
Depending on the home’s design, consider:
- A properly sized central ducted heat pump
- Multiple heat-pump zones
- Multi-zone ductless systems
- A combination of ducted and ductless systems
- Multiple systems serving different areas of the house
Large homes often have different heating and cooling requirements between floors or sections of the building. A zoning strategy can therefore be more appropriate than simply increasing equipment size.
See the best heat pumps for large homes.
3. Best Heat Pumps for Apartments
Apartments can present unique installation limitations. The available electrical service, building rules, outdoor-unit location and existing HVAC system may determine which heat-pump configurations are practical.
Ductless mini-splits can be useful where conventional ductwork is unavailable. However, renters and condo owners should check building-management requirements before selecting equipment.
Important considerations for apartments
- Permission to install an outdoor unit
- Available electrical capacity
- Noise requirements
- Condensate drainage
- Wall penetrations
- Outdoor-unit placement
- Existing HVAC equipment
See the best heat pumps for apartments.
4. Best Heat Pumps for Condos
Condos can have similar constraints to apartments, but the ownership structure can make installation more complicated.
A ductless mini-split may be attractive when there is no suitable duct system, while a centrally ducted heat pump can make sense when existing ducts are available and permitted for replacement.
Before buying equipment, determine who controls the exterior wall, balcony, roof and mechanical areas where an outdoor unit might be installed.
5. Best Heat Pumps for Older Homes
Older homes require special attention because insulation, windows, air leakage and existing ductwork can differ substantially from modern construction.
Before replacing an old heating system, consider:
- Attic insulation
- Wall insulation
- Air leakage
- Window condition
- Duct leakage
- Duct sizing
- Electrical service capacity
- Existing heating system
Improving the building envelope can change the home’s heating and cooling loads, so HVAC sizing should be based on the home’s actual characteristics.
See the best heat pumps for older homes.
6. Best Heat Pumps for New Construction
New construction provides an opportunity to design the building envelope, HVAC equipment and distribution system together.
A new home can potentially use:
- Central ducted heat pumps
- Ductless mini-splits
- Multi-zone systems
- Compact ducted systems
- Geothermal heat pumps
Because the HVAC system can be planned before construction is complete, duct routing, electrical requirements, equipment location and condensate drainage can be incorporated into the design.
Highly efficient homes can also have relatively small heating and cooling loads. This makes accurate load calculations particularly important when selecting equipment. 3
See the best heat pumps for new homes.
7. Best Heat Pumps for Homes Without Ductwork
Ductless mini-split heat pumps are specifically designed for homes or areas without conventional ductwork. They use indoor units connected to an outdoor heat-pump unit instead of distributing conditioned air through a traditional duct system. 4
They can be particularly useful for:
- Older homes
- Homes heated with baseboards
- Room additions
- Converted spaces
- Small homes
- Garages converted into living areas
- Homes where installing ducts would be disruptive
See the best heat pumps for homes without ductwork.
8. Best Heat Pumps for Homes With Existing Ductwork
If your home already has a suitable forced-air duct system, a centrally ducted air-source heat pump may be one of the simplest configurations to consider.
ENERGY STAR notes that central air-source heat pumps can use existing ductwork in many homes. However, the duct system should not simply be assumed to be suitable. Its sizing, condition, leakage and airflow should be evaluated. 5
A good installation should also include proper equipment sizing, airflow verification, refrigerant charging and component matching. 6
See the best heat pumps for homes with ductwork.
9. Best Heat Pumps for Two-Story Homes
Two-story homes can experience temperature differences between floors because heat naturally moves through the building and the floors may have different exposure to the sun and outdoor temperatures.
Potential solutions include:
- A properly designed central ducted system
- Zoned ductwork
- Multiple thermostats where supported
- Multi-zone mini-splits
- A combination of ducted and ductless equipment
Do not automatically choose a larger system simply because the home has two floors. The system should be sized according to the home’s actual heating and cooling loads.
See the best heat pumps for two-story homes.
10. Best Heat Pumps for Ranch Homes
Ranch homes often have a relatively simple single-level layout, which can make air distribution easier than in multi-story homes.
A centrally ducted heat pump can be a strong option when existing ductwork is suitable. Ductless systems can also work well where individual rooms or zones have substantially different requirements.
The placement of supply and return registers, insulation levels and the home’s floor plan should be considered before selecting equipment.
See the best heat pumps for ranch homes.
11. Best Heat Pumps for Split-Level Homes
Split-level homes can be more challenging because living areas may be distributed across several half-levels.
A single indoor unit may not distribute heat evenly throughout separated spaces. Depending on the layout, consider:
- A properly designed ducted system
- Multiple duct zones
- Multi-zone mini-splits
- Compact ducted indoor units
- A combination of ducted and ductless systems
Indoor-unit placement is especially important with ductless systems because air does not necessarily move effectively through closed doors or separated spaces. 7
12. Best Heat Pumps for Manufactured Homes
Manufactured homes can have different HVAC layouts and equipment requirements from site-built houses.
Before choosing a heat pump, evaluate:
- Existing ductwork
- Available electrical service
- Under-home duct configuration
- Available equipment space
- Home insulation
- Local climate
- Manufacturer compatibility requirements
The system should be selected for the actual home rather than based solely on its manufactured-home designation.
See the best heat pumps for manufactured homes.
13. Best Heat Pumps for Home Additions
A new addition does not necessarily require replacing the entire home’s HVAC system.
A ductless mini-split can be a practical option when extending existing ductwork would be difficult or expensive. ENERGY STAR specifically identifies additions and renovations where running new ductwork is difficult as applications for mini-split systems. 8
Possible solutions include:
- Single-zone mini-split
- Multi-zone mini-split
- Compact ducted heat pump
- Extension of an existing ducted system when capacity and duct design permit
See the best heat pumps for home additions.
14. Best Heat Pumps for Cabins and Vacation Homes
Cabins and vacation homes may have different heating requirements because they may be unoccupied for extended periods.
Important factors include:
- Local winter temperatures
- Insulation
- Freeze protection
- Remote monitoring
- Electrical reliability
- Backup heating requirements
- Whether the property has existing ducts
In a small cabin without ductwork, a ductless mini-split can be an attractive option. Larger properties may benefit from a centrally ducted or multi-zone system.
15. Best Heat Pumps for Energy-Efficient Homes
Highly insulated and tightly constructed homes can have significantly lower heating and cooling loads than older, less efficient homes.
This can create an important sizing challenge: the smallest available equipment may still be larger than the calculated load during some conditions.
Variable-capacity equipment can help by adjusting output as the home’s demand changes, but equipment selection should still begin with an accurate load calculation.
See the best heat pumps for energy-efficient homes.
Heat Pumps for Homes With Existing Electric Baseboard Heat
Homes heated with electric resistance baseboards are potential candidates for heat-pump conversion.
A heat pump can provide heating while also providing air conditioning. DOE notes that air-source heat pumps can provide an alternative to electric resistance heating, although the appropriate system depends on climate, building characteristics and design. 9
A homeowner may also retain some existing electric resistance heat as supplemental or backup heating, depending on the system design and local conditions.
Heat Pumps for Homes With a Gas Furnace
A home with a functioning gas furnace does not necessarily have to abandon the furnace when adding a heat pump.
A dual-fuel system can combine a heat pump with a gas furnace. This allows the system to use different heating sources depending on operating conditions, energy prices and system controls. ENERGY STAR identifies dual-fuel systems as an option for homes with existing furnaces. 10
See our guide to heat pumps vs. gas furnaces.
Heat Pumps for Homes With a Boiler
Homes heated with hydronic boilers can require a different approach because traditional boiler systems distribute heat through water rather than forced air.
Possible approaches include:
- Ductless mini-splits
- Adding heat pumps while retaining the boiler
- Air-to-water heat pump systems
- A combination of heat-pump and hydronic heating
The best option depends heavily on the existing distribution system and whether the homeowner wants the heat pump to provide whole-home heating or supplemental heating and cooling.
Heat Pumps for Homes With Existing Central Air Conditioning
If a home already has central air conditioning and a forced-air furnace, replacing or combining equipment can sometimes allow a heat pump to use the existing duct distribution system.
ENERGY STAR notes that central air-source heat pumps can often be installed using existing ductwork, but the existing system should be evaluated rather than assumed to be suitable. 11
Heat Pumps for Homes With Limited Electrical Capacity
Electrical capacity should be evaluated before installing a new heat-pump system, particularly in older homes.
The HVAC contractor may need to evaluate:
- Main electrical service capacity
- Available breaker space
- Required circuit size
- Indoor air-handler requirements
- Backup or auxiliary electric heat
- Other large electrical loads
Do not assume that a heat pump will automatically require a complete electrical-service upgrade. The actual requirements depend on the equipment selected and the home’s existing electrical system.
Heat Pumps for Homes in Cold Climates
Cold-climate homes require special attention to low-temperature heating capacity.
Modern cold-climate heat pumps are specifically designed to maintain heating performance at lower outdoor temperatures. ENERGY STAR’s current cold-climate criteria include low-temperature performance requirements, including measured capacity and efficiency at 5°F. 12
When comparing systems for cold climates, look beyond the nominal capacity listed for mild outdoor conditions. Ask for the manufacturer’s performance data at the outdoor temperatures relevant to your location.
Heat Pumps for Homes in Hot Climates
In hot climates, cooling performance, humidity control, efficiency and proper sizing become particularly important.
An oversized system can satisfy the thermostat quickly without necessarily providing the desired comfort and humidity control. Accurate load calculations and appropriate equipment selection are therefore important.
See our guide to the best heat pumps for hot climates.
Heat Pumps for Homes in Humid Climates
Homes in humid regions need more than simply low cooling capacity. Moisture removal and system runtime can affect indoor comfort.
A properly sized variable-capacity system may provide longer, lower-output operation under appropriate conditions, but the system still needs to be correctly designed and installed.
See our guide to the best heat pumps for humid climates.
Single-Zone vs. Multi-Zone Heat Pumps for Different Homes
A single-zone system generally serves one main area, while a multi-zone system can connect multiple indoor units to an outdoor unit.
Multi-zone systems can be useful for homes with:
- Several separated rooms
- Multiple floors
- Open and closed living areas
- Different comfort requirements
- Rooms without existing ductwork
However, adding more indoor units does not automatically guarantee uniform comfort. Indoor-unit capacity and placement must be matched to the individual spaces.
Should You Choose a Ducted or Ductless Heat Pump?
| Feature | Ducted | Ductless |
|---|---|---|
| Existing ductwork | Useful | Not required |
| Whole-home central distribution | Strong option | Depends on layout and number of indoor units |
| Homes without ducts | Requires duct installation | Strong option |
| Additions | May require new ductwork | Often convenient |
| Individual room zoning | Requires appropriate duct zoning | Strong option |
| Visual impact | Mostly concealed | Indoor units are visible |
ENERGY STAR describes ducted systems as a good match for homes with conventional forced-air ductwork and ductless mini-splits as an option where ductwork is unavailable or difficult to install. 13
How to Choose the Right Heat Pump for Your Home
Use this process rather than choosing a heat pump based only on advertised tonnage or square footage.
- Determine the home’s heating and cooling loads. Ask for a proper load calculation.
- Evaluate the building envelope. Check insulation, windows and air leakage.
- Inspect existing ductwork. Determine whether the ducts can deliver the required airflow.
- Determine whether ducts are necessary. Ductless systems may be preferable where ducts are absent or difficult to install.
- Check the local climate. Cold-climate applications require attention to low-temperature capacity.
- Evaluate electrical requirements. Confirm the home’s electrical service can support the selected equipment.
- Compare equipment performance. Look at heating and cooling performance rather than relying on one efficiency number.
- Choose the appropriate configuration. Consider ducted, single-zone, multi-zone or hybrid systems.
- Select a qualified installer. Proper sizing, installation, airflow and refrigerant charge all affect performance.
- Verify the completed installation. Commissioning should confirm that the equipment operates as designed.
Common Heat Pump Mistakes Homeowners Should Avoid
Choosing by square footage alone
Square footage can provide a rough starting point but should not replace a proper load calculation.
Buying the largest heat pump available
Bigger is not automatically better. Oversizing can increase cycling and compromise comfort and efficiency. DOE guidance specifically warns against relying on rules of thumb for sizing. 14
Assuming existing ductwork is adequate
An existing duct system may be poorly sized, leaky or unable to provide the airflow required by the new equipment.
Ignoring room layout
One ductless indoor unit may not adequately condition separated rooms simply because the total square footage appears appropriate.
Ignoring low-temperature performance
Homes in cold regions should be evaluated using the heat pump’s performance at relevant outdoor temperatures, not just its nominal rating.
Choosing equipment before choosing the design
The configuration should follow the home’s heating and cooling requirements, not the other way around.
How Much Does Home Design Affect Heat Pump Performance?
Home design can significantly influence the way a heat pump performs. The Department of Energy’s research on heat-pump selection specifically considers factors such as existing duct capacity and housing characteristics when evaluating appropriate system sizes. 15
This is why the same heat pump model may be an excellent choice for one house but a poor choice for another.
Frequently Asked Questions
What is the best heat pump for a house?
There is no single best heat pump for every house. The right system depends on heating and cooling loads, climate, ductwork, floor plan, electrical capacity and installation requirements.
Are heat pumps good for old houses?
Yes. Heat pumps can work well in older houses, but insulation, air leakage, existing ductwork and electrical capacity should be evaluated before selecting equipment.
Can I install a heat pump without ductwork?
Yes. Ductless mini-split heat pumps do not require conventional ductwork and can be used in many homes without central air distribution systems. 16
Can a heat pump use existing ductwork?
Yes. A ducted air-source heat pump can often use existing forced-air ductwork, provided the duct system is appropriate for the new equipment and can deliver the required airflow. 17
Are mini-splits good for large homes?
They can be. Large homes may use multiple indoor units or multiple zones, although a centrally ducted system may be more appropriate for some floor plans.
Should I replace my furnace with a heat pump?
It depends on your climate, existing system, electrical capacity, heating loads and operating goals. A dual-fuel configuration can also combine a heat pump with an existing furnace.
Do heat pumps work in cold climates?
Yes. Modern cold-climate heat pumps are designed to provide heating at low outdoor temperatures. When selecting one, compare its published low-temperature heating capacity and efficiency.
Do I need a bigger heat pump for a two-story home?
Not necessarily. System size should be based on calculated heating and cooling loads rather than the number of floors alone.
Can a heat pump heat an entire house?
Yes, when the system is properly designed and sized for the home’s heating load. A whole-home solution may use a central ducted system, multiple ductless zones or a combination of configurations.
Final Verdict
The best heat pump for your home is the one that matches the building’s actual heating and cooling requirements, distribution system and layout.
For homes with suitable existing ducts, a centrally ducted air-source heat pump can be an efficient replacement option. For homes without ductwork, ductless mini-splits provide a flexible alternative. Larger or more complex homes may benefit from multiple zones, while additions and individual rooms can often be served without redesigning the entire home’s HVAC system.
Most importantly, do not select a heat pump simply by square footage or by buying the largest capacity available. Proper load calculations, equipment selection, duct evaluation and professional installation are essential to achieving good comfort and efficiency. 18
Related Heat Pump Guides
- Best Heat Pumps
- Best Heat Pumps for Small Homes
- Best Heat Pumps for Large Homes
- Best Heat Pumps for Apartments
- Best Heat Pumps for Condos
- Best Heat Pumps for Older Homes
- Best Heat Pumps for New Homes
- Best Heat Pumps for Homes Without Ductwork
- Best Heat Pumps for Homes With Ductwork
- Best Heat Pumps for Two-Story Homes
- Best Heat Pumps for Ranch Homes
- Best Heat Pumps for Split-Level Homes
- Best Heat Pumps for Manufactured Homes
- Best Heat Pumps for Home Additions
- Best Heat Pumps for Cabins
About the Author
ManBearPig is a part-man, part-bear, part-pig creature and a full-time expert on global warming—mostly because he has personally experienced the consequences of being extremely, extremely, super cereal.
When he isn’t roaming the wilderness, terrorizing unsuspecting humans, or demanding that people take climate change seriously, ManBearPig studies rising temperatures, melting ice, extreme weather, carbon emissions, and other inconvenient signs that the planet may not be particularly happy with us.
His research philosophy is simple:
“I’m super cereal.”
ManBearPig believes climate change is too important to discuss without facts—and too ridiculous to discuss without a little humor. Through this website, he explores global warming, climate science, environmental changes, energy, and the strange ways humans respond when their own planet starts sending them warning signals.
He has no university degree, no laboratory, and absolutely no intention of becoming a respectable academic.
But he does have hooves, claws, a snout, and an unusually strong opinion about melting ice.