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Quick Answer
A heat pump can provide both heating and cooling, while a central air conditioner provides cooling only and typically operates alongside a separate heating system. For some Ontario homes, a heat pump may be paired with a compatible furnace in a dual-fuel or hybrid configuration, but the right setup depends on the home, existing HVAC equipment, heating requirements, and installation conditions.
If you’re considering a new cooling system, a heat pump may be worth comparing with a central air conditioner. This guide explains how heat pumps and air conditioners differ, how each can perform in Ontario conditions, the factors that affect installation and operating costs, and what homeowners should consider when choosing between them.
How Central AC and Heat Pumps Work
Central AC: A central air conditioner provides cooling. Refrigerant absorbs heat from indoor air at the evaporator coil, transfers that heat outdoors, and the system circulates cooled air through the home’s ductwork. Because a conventional central AC provides cooling only, it typically operates alongside a separate heating system.
Heat pump: An air-source heat pump uses a reversible refrigeration cycle. During summer, it removes heat from the home much like a central air conditioner. During winter, the cycle reverses and transfers heat from the outdoor air into the home.
Cold-climate heat pumps are designed for lower-temperature operation, although heating capacity and efficiency vary by model and outdoor conditions.
Rather than producing heat through electric resistance, a heat pump primarily transfers heat. Under suitable operating conditions, a heat pump can deliver more heat for the same amount of electricity than electric resistance heating.
Comparison: Central AC + Furnace vs. Dual-Fuel Heat Pump + Furnace
| Factor | Central AC + Furnace | Cold-Climate Heat Pump + Compatible Furnace (Dual-Fuel) |
|---|---|---|
| What it does | Central AC provides cooling, while the furnace provides heating. | The heat pump provides heating and cooling, while the compatible furnace can provide heating under conditions determined by the system design and controls. |
| Upfront Cost | Varies by AC equipment, furnace requirements, installation complexity, and existing infrastructure. | Varies by heat-pump equipment, furnace compatibility, controls, electrical requirements, and installation complexity. |
| Cooling Efficiency | Compare the applicable SEER2 rating for the selected AC equipment. | Compare the applicable SEER2 rating for cooling and heating performance ratings for the selected heat pump. |
| Heating Performance | Depends on furnace efficiency, fuel source, equipment condition, and system design. | Heat-pump heating performance varies with outdoor temperature. The furnace can provide an additional heating source when required by the system strategy. |
| Very Cold Weather | Space heating is provided by the furnace. | Heat-pump operation and furnace changeover depend on the equipment, heating load, controls, balance point, and outdoor conditions. |
| Operating Cost | Depends on electricity and fuel rates, equipment efficiency, runtime, and home heating and cooling demand. | Depends on how much heating is provided by the heat pump versus the furnace, electricity and fuel rates, equipment efficiency, and operating conditions. |
| Fuel Use | Furnace operation may use natural gas, oil, or another fuel depending on the system. | A heat pump uses electricity for heating and cooling. In a dual-fuel system, the furnace uses its applicable fuel when supplemental or backup heating operates. |
| Ontario Rebates | Availability depends on the specific equipment and current program requirements. | Eligible cold-climate air-source heat pumps may qualify for current Ontario rebates, subject to program, equipment, and installation eligibility requirements. |
| May Be Suitable For | Homeowners who want to keep separate central cooling and furnace heating as part of their existing HVAC setup. | Homes where a compatible heat pump and furnace can be integrated as part of a properly designed dual-fuel system. |
Can a Heat Pump Actually Handle Ontario Winters?
Cold-climate air-source heat pumps are designed to provide heating at lower outdoor temperatures than many conventional air-source models. However, heating capacity and efficiency still vary by equipment and outdoor conditions, so suitability should be evaluated using the performance data for the specific system being considered.
Depending on the model, cold-climate heat pumps may include features such as variable-capacity compressors, low-temperature controls, and automatic defrost operation. These features help the system adapt to changing heating demand and manage frost that can develop on the outdoor coil during winter operation.
For an Ontario home, important factors include:
- The home’s calculated heating load, including local winter design temperatures
- The heat pump’s published low-temperature heating capacity
- Insulation and air leakage
- Existing ductwork or indoor-unit configuration
- Available electrical capacity for the proposed heat-pump system and any supplemental heating
- The supplemental-heating strategy, where applicable
Some homes may use a cold-climate heat pump as the primary heating system, while others may pair one with a compatible gas furnace in a dual-fuel or hybrid configuration.
In a dual-fuel system, the point at which the furnace provides heating depends on the equipment, system controls, heating requirements, and configured operating strategy. There is no single outdoor temperature at which every hybrid system switches from the heat pump to the furnace.
For more information, see our guide to dual fuel heating systems in Ontario
If you’re considering a heat pump installation in Ottawa, the system should be evaluated against your home’s heating requirements and local winter conditions.
SEER2 Ratings and Efficiency Numbers Explained
SEER stands for Seasonal Energy Efficiency Ratio, while SEER2 stands for Seasonal Energy Efficiency Ratio 2. Both are ratings used to describe the seasonal cooling efficiency of air conditioners and heat pumps under standardized test conditions. SEER2 uses updated testing procedures intended to better represent the conditions HVAC equipment experiences in an installed system.
A higher SEER2 rating indicates greater rated seasonal cooling efficiency under the applicable test conditions, but it does not guarantee lower household electricity use or operating costs. Actual energy consumption depends on factors such as system sizing, installation quality, weather, thermostat settings, runtime, and the home’s cooling load.
SEER2 uses updated testing procedures compared with the earlier SEER method, so the two ratings should not be treated as directly interchangeable.
| Efficiency Metric | Central Air Conditioner | Air-Source Heat Pump |
|---|---|---|
| SEER2 | Measures rated seasonal cooling efficiency | Measures rated seasonal cooling efficiency |
| Canadian minimum for a standard single-phase split system | SEER2 13.4 for applicable equipment manufactured on or after January 1, 2023 | SEER2 14.3 for applicable equipment manufactured on or after January 1, 2025 |
| HSPF2 | Not applicable because a central AC does not provide heating | Measures rated seasonal heating efficiency |
| Canadian HSPF2 minimum for a standard single-phase split-system heat pump | Not applicable | HSPF2 Region V 6.0 |
| What a higher rating indicates | Greater rated seasonal cooling efficiency under the applicable test standard | Greater rated seasonal cooling or heating efficiency under the applicable test standard |
(Values shown apply to standard single-phase split systems. Requirements vary for space-constrained and small-duct, high-velocity equipment)
Heat pumps also have an HSPF2, or Heating Seasonal Performance Factor 2, rating that indicates seasonal heating efficiency under standardized test conditions. The Canadian requirements shown here use HSPF2 Region V. A higher HSPF2 Region V rating indicates greater rated seasonal heating efficiency when comparing systems under the same applicable standard, but it does not guarantee lower household heating costs.
For qualifying cold-climate air-source heat pumps, the current Home Renovation Savings incentive depends on the home’s primary heating source. Homes heated primarily by Enbridge natural gas may qualify for $500 per ton, up to $2,000. Homes heated primarily by electricity, oil, propane or wood may qualify for $1,250 per ton, up to $7,500. Eligibility, equipment and installation requirements apply. Pre-approval is mandatory before installation, and work completed before approval is not eligible for the rebate.
What Affects Heat Pump vs. Air Conditioner Operating Costs?
| Cost Factor | Central AC + Separate Heating System | Heat Pump |
|---|---|---|
| Summer cooling | Depends on AC efficiency, cooling load, electricity rates, and runtime | Depends on heat-pump cooling efficiency, cooling load, electricity rates, and runtime |
| Winter heating | Depends on the separate heating system’s efficiency, fuel source, heating demand, fuel and electricity rates, and runtime. | Depends on heat-pump efficiency at different outdoor temperatures, heating demand, electricity rates, and any supplemental heating used. |
| Existing equipment | Replacing only the AC may allow other compatible HVAC equipment to remain in service | Installation requirements depend on the proposed heat pump and compatibility with existing equipment |
| Utility rates | Electricity affects cooling costs, while the heating fuel affects winter operating costs | Electricity affects heat-pump operation; a dual-fuel system may also continue to use natural gas or another furnace fuel |
| Home characteristics | Insulation, air leakage, home size, ductwork, thermostat settings, and outdoor temperatures affect energy use and heating performance. | Insulation, air leakage, home size, ductwork, thermostat settings, and outdoor temperatures affect energy use and heating performance. |
| Incentives | Eligibility depends on the specific project and current programs | Eligible heat-pump installations may qualify for available incentives, subject to current program requirements |
When comparing the two options, homeowners should consider both installation cost and estimated operating cost rather than relying on equipment efficiency ratings alone. A meaningful estimate should consider the home’s heating and cooling requirements, existing HVAC equipment, proposed replacement equipment, local utility rates, and, where available, historical energy use.
A Home Comfort Advisor can help compare the available system options and project costs. Where technical factors such as sizing, ductwork, electrical requirements, or equipment compatibility need to be evaluated, those requirements should be confirmed as part of the HVAC assessment.
If you’re considering a heat pump installation, compare the available options based on your home’s existing equipment, heating and cooling requirements, and installation conditions.
Ontario Heat Pump Rebates and Incentives in 2026
Qualifying heat-pump installations may be eligible for Ontario rebates or financing, depending on the program, equipment, property and current eligibility requirements.
| Program | Current Benefit | Status |
|---|---|---|
| Home Renovation Savings: Cold-climate air-source heat pump | $500/ton up to $2,000 for eligible Enbridge natural-gas-heated homes; $1,250/ton up to $7,500 for eligible homes primarily heated by electricity, oil, propane or wood | Active; pre-approval and current eligibility requirements apply |
| Home Renovation Savings: Smart thermostat | $100 | Active, subject to current eligibility requirements |
| Canada Greener Homes Loan | Formerly up to $40,000 interest-free | Closed to new applications |
| City of Toronto Home Energy Loan Program (HELP) | Financing up to $125,000 | Currently open to eligible Toronto homeowners |
| Enbridge Home Efficiency Rebate Plus (HER+) | Not available to new applicants | Closed to new applicants and no longer accepting new applications |
Note: As of 2026, Ontario homeowners should focus on currently available programs such as Home Renovation Savings. Several older federal and provincial programs listed below are closed to new applicants.
The Home Renovation Savings program currently lists rebates of up to $7,500 for qualifying cold-climate air-source heat pumps. The rebate amount and eligibility depend on current program requirements, and qualifying heat pumps must meet applicable program criteria.
Program amounts, eligibility rules, and availability can change. Homeowners should verify the current requirements with the applicable program before making a purchase decision.
LG Home Comfort can help homeowners review available incentive options when comparing a heat-pump installation, but final eligibility and rebate approval are determined according to the applicable program requirements.
For homeowners in Guelph considering a heat pump installation, available incentives can be considered alongside equipment options, home requirements, and installation conditions.
Which Option May Be Right for Your Home?
The better choice depends on your existing HVAC equipment, heating and cooling requirements, home layout, budget, and installation conditions.
| Your Situation | Option to Consider |
|---|---|
| Your existing furnace is in good condition and compatible with the proposed system | Compare an AC-only replacement with heat-pump options that may be compatible with the existing furnace. |
| Your furnace may also need replacement | Compare replacing the heating and cooling equipment together with other suitable system configurations based on the home’s heating and cooling needs. |
| You want to reduce on-site fossil-fuel use | Consider an all-electric heat-pump configuration if the home and electrical system are suitable for it |
| Your furnace is suitable to remain, and you primarily need to replace cooling | Compare the initial and operating costs of a central AC replacement with a heat pump |
| You may qualify for current heat-pump incentives | Include available incentives when comparing eligible heat-pump project costs |
| Your home does not have suitable ductwork | A ductless heat pump may be an option, depending on the home’s layout, heating load, zoning needs, and installation conditions |
A Home Comfort Advisor can help compare equipment and system options based on the homeowner’s priorities. Technical factors such as equipment sizing, ductwork, electrical requirements, controls, and compatibility should be evaluated as part of the HVAC assessment.
LG Home Comfort installs and services heat pumps and central air conditioners across the Ontario communities we serve. Contact our team to discuss your home’s requirements and available options, or call 1-866-438-5442.
Final Thoughts
A central air conditioner and a heat pump can both provide effective home cooling, but they serve different roles within an HVAC system. The better fit depends on the equipment already in the home, the property’s heating and cooling needs, and the homeowner’s long-term plans.
Rather than choosing based on a single efficiency rating, rebate, or equipment feature, compare the complete system configuration and installation requirements. That provides a more useful basis for deciding which system is appropriate for the home.
Frequently Asked Questions
01 How long does a heat pump last?
An air-source heat pump typically has a service life of about 15 to 20 years, although actual lifespan depends on the equipment, installation quality, operating conditions, maintenance history, and how frequently the system runs. Because a heat pump may provide both heating and cooling, its operating pattern can differ from that of an air conditioner used only during the cooling season. Following the manufacturer’s maintenance recommendations and addressing developing equipment problems can help support reliable operation over time.
02 Are heat pumps noisier than central air conditioners?
Not necessarily. Both systems use outdoor equipment containing components such as a compressor and fan, and sound levels vary by model, operating speed, equipment condition, and installation. Homeowners concerned about noise can compare the manufacturer’s published sound ratings and consider outdoor-unit placement when evaluating equipment.
03 Does a heat pump dehumidify the home like an air conditioner?
Yes. An air-source heat pump can remove moisture from indoor air while operating in cooling mode, much like a central air conditioner. How effectively it controls humidity depends on equipment sizing, runtime, airflow, controls, and indoor moisture levels. A higher efficiency rating by itself does not determine how well a particular system will manage indoor humidity.
04 What happens to a heat pump during a power outage?
A heat pump requires electricity for its compressor, fans, and controls, so it will not operate normally during a power outage. A gas furnace also typically requires electricity for components such as its blower and controls, even though its heating fuel may be natural gas. If maintaining heating or cooling during an outage is important, backup-power requirements should be considered separately for the specific HVAC equipment.
05 Does a heat pump require different maintenance than an air conditioner?
Many basic maintenance tasks are similar, including keeping filters clean, maintaining airflow around the outdoor unit, and following the manufacturer’s service recommendations. Because a heat pump may operate during both heating and cooling seasons, it should also be checked for winter conditions such as snow, debris, and frost around the outdoor equipment. Annual professional maintenance can help support efficient and reliable system operation.
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