What Is a Heat Pump? 7 Smart Facts for BC Homeowners

What Is a Heat Pump?

A heat pump is a mechanical system that moves heat from one place to another. It uses electricity to operate a compressor, fans, controls, and other components, but it does not create all of its heat through electric resistance.

During winter, an air-source heat pump collects available heat from the outdoor air and transfers it into the home. Outdoor air still contains usable thermal energy even when it feels cold.

During summer, the system reverses direction. It removes heat from the indoor air and releases it outdoors, much like a standard air conditioner.

This means one system can provide:

• Home heating during colder weather
• Home cooling during warmer weather
• Air circulation and filtration
• Humidity removal during cooling operation
• Zoned comfort when the system supports multiple indoor areas

Natural Resources Canada provides additional information about heat pump basics and cold-climate operation.

How Does a Heat Pump Work?

A heat pump uses a sealed refrigeration circuit. The main components normally include an outdoor coil, an indoor coil, a compressor, an expansion device, refrigerant piping, fans, and system controls.

The refrigerant changes pressure, temperature, and physical state as it travels through the system. These changes allow it to absorb heat in one location and release it in another.

How a Heat Pump Works in Heating Mode

In heating mode, the outdoor coil absorbs heat from the outside air. The refrigerant carries that heat to the compressor.

The compressor raises the refrigerant pressure and temperature. The hot refrigerant then travels to the indoor coil, where it releases heat into the air inside the home.

A fan moves the heated air through ductwork or directly into the room, depending on the type of indoor equipment.

After releasing its heat, the refrigerant passes through an expansion device. Its pressure and temperature drop, allowing the cycle to begin again.

How a Heat Pump Works in Cooling Mode

In cooling mode, a reversing valve changes the direction of the refrigeration cycle.

The indoor coil absorbs heat from the home. The system transfers that heat outside, where the outdoor coil releases it into the air.

Moisture also condenses on the cold indoor coil during cooling operation. A properly installed drain carries this condensate away from the equipment.

Fact 1: A Heat Pump Provides Heating and Cooling

A standard central air conditioner provides cooling only. A heat pump can provide cooling and heating because it includes controls that reverse the refrigeration cycle.

This can make a heat pump useful for BC homes that currently have:

• Electric baseboard heating with no central cooling
• A gas furnace that heats well but has no air conditioner
• An older furnace and air conditioner that both need replacement
• A basement suite with poor temperature control
• A home addition without suitable ductwork
• Bedrooms or upper floors that overheat during summer
• An aging heat pump with repeated repair problems

The same outdoor unit can serve both seasonal needs, but the indoor equipment and controls must match the selected design.

A central system may use a ducted air handler or a compatible furnace coil. A ductless system may use one or more wall-mounted, floor-mounted, ceiling-mounted, or concealed indoor units.

Fact 2: A Heat Pump Moves Heat Instead of Burning Fuel

A gas furnace produces heat by burning natural gas. Electric baseboards produce heat through electrical resistance. A heat pump works differently because it transfers existing heat.

This difference allows a properly operating heat pump to deliver more usable heating energy than the electrical energy consumed by the compressor and fans under many operating conditions.

Actual performance changes with:

• Outdoor temperature
• Indoor temperature setting
• Equipment model and capacity
• Compressor speed
• Airflow through the indoor coil
• Airflow through the outdoor coil
• Defrost operation
• Duct leakage and insulation
• Refrigerant charge
• Use of auxiliary heat

A high-efficiency model cannot overcome blocked airflow, poor refrigerant practices, undersized ducts, unsuitable controls, or incorrect installation. Efficiency ratings describe tested equipment performance. They do not fix poor installation.

Fact 3: Different Homes Need Different Types of Heat Pumps

There is no single heat pump design that fits every property. BC homes include detached houses, older character homes, condos, townhouses, basement suites, laneway homes, coach houses, and properties with boilers or electric baseboards.

The existing heating system and building layout strongly affect the right option.

Ducted Central Heat Pumps

A ducted heat pump distributes heated and cooled air through supply and return ductwork. The indoor equipment may include an electric air handler or a coil installed with a compatible gas furnace.

Ducted systems often suit:

• Detached homes with existing forced-air ducts
• Homes replacing a central furnace and air conditioner
• Full-electric whole-home conversions
• Dual-fuel heating systems
• New construction with properly designed ductwork

The existing ducts must support the airflow required by the new equipment. A duct system that connects to the unit may still create high static pressure, excessive noise, weak bedroom airflow, or poor coil performance.

Ductless Mini-Split Heat Pumps

A ductless mini-split does not use central ductwork. Refrigerant piping and electrical wiring connect the indoor unit to the outdoor unit.

Ductless systems often suit:

• Homes heated with electric baseboards
• Older homes without central ductwork
• Basement suites
• Home additions
• Garages converted into living space
• Boiler-heated homes that need cooling
• Specific floors or rooms with comfort problems

Indoor-unit placement affects comfort. The unit needs a clear air path and a suitable drain route. It should not blow directly across a bed, desk, sofa, or dining area.

Multi-Zone Heat Pumps

A multi-zone heat pump connects several indoor units to one outdoor unit. Each indoor unit serves a separate room or area.

This design can improve temperature control in homes with several floors, additions, separate suites, or rooms with different schedules.

The contractor must review the load of each zone. Installing an indoor head in every room without checking connected capacity, line lengths, minimum output, and simultaneous demand can create an oversized and inefficient system.

Central Heat Pumps With Existing Furnaces

A central heat pump can sometimes work with an existing gas furnace. The heat pump provides cooling and handles part of the heating season. The furnace takes over according to the control settings and system design.

This setup is commonly called a hybrid or dual-fuel system.

Fact 4: Cold-Climate Heat Pumps Can Work During BC Winters

Modern cold-climate heat pumps use variable-speed compressors and controls designed to maintain useful heating performance as outdoor temperatures fall.

Natural Resources Canada states that some cold-climate air-source heat pumps can operate at temperatures down to approximately -30°C. That does not mean every model provides the same capacity or efficiency at that temperature.

Cold-weather performance depends on the exact indoor and outdoor equipment combination. The installer should review manufacturer performance data at relevant outdoor temperatures rather than relying only on the nominal capacity printed in a product name.

For homes in Metro Vancouver and the Fraser Valley, system planning should consider:

• The calculated heating load of the home
• Equipment output at lower outdoor temperatures
• Building insulation and air leakage
• The condition of existing ductwork
• Defrost operation
• Supplementary or backup heat
• Electrical service capacity
• Homeowner comfort expectations

What Happens During the Defrost Cycle?

During heating operation, the outdoor coil may collect frost. The heat pump periodically enters a defrost cycle to melt this frost.

During defrost, the outdoor unit may produce water, steam, or a temporary change in sound. These conditions can be normal.

The installer must plan where the defrost water will drain. Poor placement can allow water to freeze across a walkway, collect near the foundation, drip onto a lower balcony, or build ice around the unit.

Does Every Heat Pump Need Backup Heat?

Not every system uses the same backup strategy.

A full-electric ducted system may include electric auxiliary heat inside the air handler. A dual-fuel system may use a gas furnace as the alternate heating source. Some ductless systems may operate without a separate central backup system, depending on the building and design.

The backup heat decision should follow a heat-loss calculation and equipment performance review. It should not depend on guessing or whichever option makes the quote easier to prepare.

Fact 5: Correct Heat Pump Sizing Matters More Than Choosing the Largest Unit

A heat pump should not be selected from square footage alone. Two homes with the same floor area may have very different heating and cooling loads.

Important factors include:

• Wall, ceiling, and floor insulation
• Window size, type, and orientation
• Air leakage
• Ceiling height
• Number of floors
• Building exposure
• Finished basement areas
• Solar heat gain
• Number of occupants
• Local outdoor design conditions

Problems Caused by an Oversized Heat Pump

An oversized system may satisfy the thermostat quickly, but that does not always create better comfort.

Oversizing can contribute to:

• Short operating cycles
• Uneven temperatures
• Reduced summer humidity removal
• Higher airflow noise
• More noticeable starts and stops
• Higher equipment cost
• Poor performance in smaller zones

Problems Caused by an Undersized Heat Pump

An undersized heat pump may run continuously and still fail to maintain the desired temperature during more demanding weather.

Possible results include:

• Increased auxiliary heat use
• More frequent furnace operation in a dual-fuel system
• Rooms that remain too cold or too warm
• Long operating periods at maximum output
• Higher operating cost than expected

The goal is not to install the smallest or largest available unit. The goal is to match the equipment to the building load, distribution system, and backup heating strategy.

Fact 6: The House Matters as Much as the Heat Pump

A heat pump operates as part of the home. Its performance depends on much more than the outdoor unit.

A proper assessment should review the entire system before equipment is ordered.

Existing Ductwork

A central heat pump needs suitable airflow. The contractor should review:

• Supply trunk size
• Return-air capacity
• Filter size and restriction
• Branch duct condition
• Disconnected or leaking joints
• Crushed flexible duct
• Closed or blocked registers
• Duct insulation in attics and crawl spaces
• Static pressure
• Airflow to distant bedrooms and upper floors

A new heat pump cannot correct every old duct problem. Connecting new equipment to restricted or leaking ductwork simply gives the existing problem a newer serial number.

Electrical Capacity

Heat pumps require electrical circuits for the outdoor unit and indoor equipment. Full-electric systems may also require capacity for auxiliary heat.

The assessment should consider:

• Main electrical service size
• Available breaker spaces
• Existing household electrical loads
• Outdoor-unit circuit requirements
• Indoor air-handler requirements
• Electric heat-strip capacity
• Electric water heating
• EV charging
• Electric cooking equipment
• Hot tubs or other major loads

Some homes can support a heat pump using the existing panel. Others may need circuit changes, load management, a panel upgrade, or a larger electrical service.

Outdoor Unit Placement

The outdoor unit needs suitable airflow, drainage, service access, and protection from damage.

A good location should provide:

• Manufacturer-required clearances
• Access for maintenance and repair
• Distance from roof runoff
• Suitable defrost-water drainage
• A stable mounting surface
• Reasonable distance from bedrooms
• Reasonable distance from neighbouring windows
• A practical refrigerant-line route
• Protection from vehicles, storage, and landscaping

Narrow side yards, balconies, rooftops, and strata properties need additional planning for airflow, noise, vibration, drainage, structural support, and approvals.

Insulation and Air Leakage

A heat pump may still operate in an older home, but high heat loss can increase the required equipment capacity and backup heating demand.

Improving insulation, air sealing, and windows may reduce the building load. These upgrades can also improve comfort in rooms that remain cold because of drafts or exposed surfaces.

Fact 7: You Can Choose Full-Electric or Dual-Fuel Heating

A heat pump does not always require removing the gas furnace. The final arrangement depends on the home and the homeowner’s priorities.

Full-Electric Heat Pump Systems

A full-electric system uses the heat pump as the main heating and cooling source. A ducted system may include electric auxiliary heat for colder conditions, defrost support, or emergency operation.

Full-electric systems may suit homeowners who:

• Want to replace electric baseboards
• Want to remove an older gas, oil, or propane system
• Have suitable electrical capacity
• Are planning major renovations or new construction
• Want one electric system for heating and cooling

Dual-Fuel Heat Pump Systems

A dual-fuel system combines an electric heat pump with a gas furnace. The heat pump provides summer cooling and heating during selected outdoor conditions. The furnace operates when the controls reach the chosen changeover conditions.

Dual-fuel systems may suit homeowners who:

• Have a usable existing gas furnace
• Want to add central cooling
• Prefer gas backup heating
• Have a home with a higher winter heating load
• Want flexibility between electricity and natural gas
• Cannot support a large electric auxiliary heater without major electrical work

Control setup matters. The thermostat or system controller must manage the heat pump, furnace, defrost cycle, equipment staging, and changeover logic correctly.

Poor configuration may cause the furnace to operate more often than expected or activate both systems incorrectly.

Homeowners comparing these options can also review our furnace installation service.

How Efficient Is a Heat Pump?

Heat pump efficiency depends on the equipment, outdoor conditions, system design, and installation quality.

Common ratings include:

• SEER2: Seasonal cooling efficiency
• HSPF2: Seasonal heating performance
• COP: Heating output compared with electrical energy input at a specific operating condition

Higher ratings can indicate more efficient equipment under standardized test conditions. They do not guarantee lower utility bills in every home.

Actual energy use depends on:

• The previous heating system
• Electricity and fuel rates
• Thermostat settings
• Weather conditions
• Home insulation
• Equipment sizing
• Use of auxiliary heat
• Duct leakage
• Maintenance
• Occupant habits

A homeowner replacing electric resistance heat may see a different result from someone adding a heat pump beside an efficient gas furnace. Operating-cost claims should account for the actual property and energy sources.

What Does a Heat Pump Feel Like Inside the Home?

Heat-pump air may feel different from the hotter supply air produced by a gas furnace. Heat pumps often deliver warm air for longer periods instead of producing shorter blasts of very hot air.

Variable-capacity systems may run for extended periods at lower output. This can help maintain steadier room temperatures.

Long operation does not automatically mean the system is wasting energy or failing. However, the system should still reach the thermostat setting and operate without excessive noise, icing, fault codes, or unnecessary auxiliary heat.

Comfort depends on:

• Supply-air temperature
• System airflow
• Register location
• Return-air paths
• Thermostat location
• Equipment capacity
• Room-by-room heat loss
• Indoor-unit placement

Heat Pumps for Different BC Home Types

Detached Homes With Furnaces

A detached home with forced-air ductwork may support a central heat pump. The system may use a new electric air handler or work with a compatible gas furnace.

The ducts, electrical system, equipment space, and outdoor location should be assessed before choosing the unit.

Homes With Electric Baseboards

Ductless heat pumps can reduce reliance on electric baseboards without installing full central ductwork. The baseboards may remain for backup or rooms not served by the heat pump.

Homes With Boilers

A standard air-source heat pump does not directly use boiler pipes to distribute warm air. Boiler-heated homes often use ductless heat pumps for cooling and supplementary heating.

A larger renovation may use new ductwork or other specialized heat-pump designs, but the scope can become significantly more complex.

Basement Suites

A basement suite may have different heating and cooling needs from the main floor. One central thermostat may not control both areas effectively.

Suitable options may include zoning, separate ductless equipment, additional return air, or a dedicated system for the suite.

Condos and Townhouses

Condo and townhouse installations may require strata approval. The project may need equipment specifications, sound data, placement drawings, drainage details, refrigerant-line routes, and proof of permits.

Balcony space alone does not prove that an outdoor unit can operate there. The unit still needs open airflow and a safe drainage plan.

Heat Pump Rebates and Permits in British Columbia

Heat pump rebates may be available through provincial programs, BC Hydro, FortisBC, or related energy-efficiency programs.

Eligibility can depend on:

• The home’s existing heating source
• Property type
• Household income
• Utility provider
• Selected equipment
• Cold-climate certification
• Heat-load calculation requirements
• Contractor qualifications
• Pre-registration or pre-approval
• Whether the project replaces an existing heat pump

Program rules and rebate amounts can change. Check the official Better Homes BC rebate finder before purchasing equipment.

FortisBC electric customers can also review the current FortisBC air-source heat pump rebate requirements.

Do Heat Pumps Require Permits?

Heat pump projects can involve refrigeration, electrical, gas, mechanical, building, or municipal requirements depending on the installation.

A project connected to an existing gas furnace may include regulated gas work. A new electrical circuit or air handler may require electrical permitting. Municipal requirements can also apply to equipment placement, noise, or building work.

Technical Safety BC provides official information about heat pump permits and regulated installation work.

Homeowners should confirm which permits, inspections, and approvals are included in the contractor’s proposal.

How Should a Heat Pump Be Maintained?

Regular maintenance supports airflow, heat transfer, drainage, and reliable operation.

Homeowner maintenance may include:

• Cleaning or replacing filters
• Keeping indoor grilles open and unobstructed
• Removing leaves and debris around the outdoor unit
• Keeping snow, ice, and storage away from the coil
• Checking for unusual noise or vibration
• Watching for water leaks
• Keeping condensate drains clear
• Following the manufacturer’s operating instructions

BC Hydro recommends cleaning filters regularly, keeping the outdoor unit clear, and scheduling professional maintenance based on the equipment and operating conditions. Review its official heat pump maintenance tips.

A professional service may include:

• Heating and cooling operation checks
• Airflow measurements
• Temperature measurements
• Electrical testing
• Coil inspection
• Drainage inspection
• Filter and blower inspection
• Defrost checks
• Thermostat and control review
• Refrigerant-system diagnostics when needed

When Should You Consider a Heat Pump?

A heat pump may be worth assessing when:

• Your home needs summer cooling
• You rely on electric baseboard heating
• Your furnace and air conditioner are nearing replacement
• You want separate temperature zones
• You are renovating or adding living space
• Your upper floor becomes too hot
• You want to keep a gas furnace but add cooling
• You want to reduce reliance on combustion heating
• You are building a new home
• Your existing heat pump needs repeated repairs

The correct recommendation should follow an assessment of the building, not a universal claim that every homeowner needs the same system.

Plan a Heat Pump Installation in Metro Vancouver or Fraser Valley

Bernoulli Heating and Cooling provides heat pump installation assessments for ducted, ductless, multi-zone, cold-climate, full-electric, and dual-fuel systems.

We review the existing heating equipment, ductwork, electrical capacity, property layout, equipment locations, drainage, and homeowner priorities before preparing a proposal.

Explore local heat pump installation information for:

• Heat Pump Installation Vancouver
• Heat Pump Installation Burnaby
• Heat Pump Installation Surrey

Call 604-518-4438 or email heatingbernoulli@gmail.com to request a free estimate for a new heat pump installation. Diagnostic service appointments are $135.