Geothermal Heat Pumps in Canada: Cost, Loops, Payback and Who They Suit

A geothermal heat pump, also called a ground-source heat pump, moves heat between your home and the ground through a buried loop of pipe. A few metres down, the ground in Canada stays at a fairly steady temperature all year. That steady source lets the system run at a seasonal efficiency (COP) of about 3.5 or higher, which means every kWh of electricity delivers roughly 3.5 kWh of heat.

If you are asking whether geothermal heat pumps in Canada are worth the cost, the short answer depends on what you heat with now. Homes leaving oil, propane or electric baseboard can save thousands of dollars a year. Homes on natural gas usually save little, and a cold-climate air-source heat pump often makes more financial sense.

How a geothermal system works

A fluid circulates through pipes in the ground and picks up heat. The heat pump indoors concentrates that heat and sends it through your ducts or a hydronic system. In summer it runs in reverse and moves heat from your home into the ground, so it also provides central air conditioning. Many systems can preheat domestic hot water as well.

Loop types

• Horizontal closed loop. Pipe laid in trenches about 1.5 to 2 metres deep. It needs a large yard, so it suits rural lots and new builds.
• Vertical closed loop. Pipe placed in drilled boreholes. It fits smaller lots but drilling is costly.
• Open loop. Uses well water directly and returns it to the ground. It needs a good water supply and may need provincial or municipal approval.
• Pond or lake loop. Coils sunk in a body of water on your property. It can be the cheapest loop where it is possible.

What geothermal costs in Canada

Installed prices vary more than for any other heating system. The heat pump unit itself costs about the same as a good furnace and air conditioner together. The loop is the wildcard. Drilling, trenching, rock, soil type, access for equipment and landscaping repair all move the price. Many Canadian retrofits land somewhere in the range of $25,000 to $50,000 or more before rebates. Get at least two quotes from installers who do loop design themselves.

Rebates help. In Ontario, the Home Renovation Savings Program (Save on Energy and Enbridge) offers up to $12,000 for ground-source systems. The federal Oil to Heat Pump Affordability program can also apply if you heat with oil in an eligible province. Other provinces run their own programs, so check your provincial rebate page for current amounts.

Running costs compared

The table below shows yearly heating cost in Ontario for a home that needs about 22,000 kWh of delivered heat per year. It uses approximate all-in prices of $0.17/kWh, $0.48/m³ gas, $1.65/L oil and $0.90/L propane. Assumed efficiencies are 95% for gas and propane furnaces, 85% for oil, COP 2.2 to 3.0 for a cold-climate air-source heat pump and COP 3.5 for geothermal.

Against gas, geothermal in Ontario roughly breaks even on heating cost. Against oil, it can save close to $3,000 a year. Your numbers will differ, so run your own home through the heat pump calculator.

Geothermal payback: when it makes sense

Payback is the extra cost you pay divided by what you save each year. Because geothermal costs much more than an air-source system, compare it against both your current system and a cold-climate air-source heat pump.

• Switching from oil or propane. Savings are large. With rebates, payback can fall in the 8 to 15 year range for many homes.
• Switching from electric baseboard. Savings are also large, but you may need ductwork, which adds cost.
• Switching from natural gas. Savings are small in most provinces with cheap gas. Payback often runs past the life of the equipment. Nova Scotia and New Brunswick, where gas costs more, are partial exceptions.
• Versus an air-source heat pump. Geothermal typically saves a few hundred dollars a year more. That rarely repays an extra $15,000 to $30,000 on its own.

The loop lasts a long time, often 50 years or more, and the indoor unit typically lasts 20 to 25 years. That long loop life is part of the case for geothermal. Our guide to heat pumps versus gas furnaces covers the broader trade-offs.

Who geothermal suits

• Rural homes on oil or propane with room for a horizontal loop or a good well.
• New builds, where trenching or drilling happens alongside other site work.
• Larger, well-insulated homes with high heating loads and long ownership plans.
• Owners who value quiet operation and no outdoor unit.

It suits you less if your lot is small and rocky, you plan to move within ten years, or you have cheap natural gas. In those cases, look at hybrid dual-fuel heating or a cold-climate air-source unit. If you heat with oil, read our guide to switching from oil heat before deciding.

Before you get quotes

Seal air leaks and add insulation first. A smaller heating load means a smaller loop, which can cut thousands from the price. Ask installers for a room-by-room heat loss calculation, the loop length they propose and why, and who handles permits. If the numbers work for your home, you can request quotes from vetted installers.