When Ottawa's winter temperatures plunge to minus 30 and stay there for days, your heating system is not a comfort amenity — it is a survival necessity. Whether you need a new high-efficiency furnace installed in your Barrhaven home, an aging boiler serviced in your Centretown townhouse, a heat pump system added to your Kanata split-level, or emergency heating repair at 2 AM during a January cold snap, finding a qualified heating contractor in Ottawa can mean the difference between a warm, efficient home and a frozen pipe nightmare. Ottawa homeowners spend an average of $2,000 to $3,500 per ye...
Ottawa homes use a variety of heating systems. Understanding your options helps you make informed decisions when upgrading or replacing your current system.
Forced-air natural gas furnaces are the most common heating system in Ottawa, found in approximately 70 percent of residential homes. Modern high-efficiency condensing furnaces achieve 96 to 98 percent AFUE (Annual Fuel Utilization Efficiency), meaning virtually all the gas burned is converted to heat. Ottawa homeowners replacing an older 80-percent-efficiency furnace with a new 96-percent model can save $400 to $800 per year on gas bills. Two-stage and modulating furnaces provide more consistent temperatures and quieter operation than single-stage units. Variable-speed blower motors reduce electricity consumption by 30 to 50 percent compared to standard motors. Most Ottawa furnace installations include a matching air conditioning coil, allowing the same ductwork to serve both heating and cooling.
Heat pumps are the fastest-growing heating technology in Ottawa thanks to dramatic improvements in cold-climate performance and generous government rebates. Modern cold-climate air-source heat pumps (ccASHP) can provide efficient heating down to minus 25 to minus 30 degrees Celsius, making them viable for Ottawa's winters when paired with a backup heat source. A heat pump can reduce heating costs by 40 to 60 percent compared to electric resistance heating and 20 to 30 percent compared to natural gas in milder periods. Ground-source (geothermal) heat pumps offer the highest efficiency but require significant upfront investment for the ground loop installation. The Canada Greener Homes Grant offers up to $7,100 for ccASHP installation and up to $5,000 for geothermal systems. Ductless mini-split heat pumps are popular for homes without existing ductwork or as zone heating supplements.
Hydronic boiler systems provide heat through hot water circulated to radiators, baseboard convectors, or in-floor radiant tubing. Boilers are common in older Ottawa homes, particularly in neighbourhoods like the Glebe, Old Ottawa South, Centretown, and Sandy Hill. Modern condensing boilers achieve 95 to 98 percent efficiency. Radiant in-floor heating is increasingly popular in Ottawa new construction and major renovations — it provides the most comfortable, even heat distribution of any system. In-floor radiant is typically installed during construction or renovation when floors are accessible, making it impractical as a retrofit in most occupied homes. Combination (combi) boilers provide both space heating and domestic hot water from a single unit, saving space in smaller Ottawa homes and condos.
Electric baseboard heaters and electric forced-air furnaces are found in some Ottawa homes, particularly older condos, townhouses, and homes not connected to natural gas. While electric heating is simple and has no combustion concerns, it is significantly more expensive to operate in Ottawa than natural gas — roughly 3 to 4 times the cost per unit of heat. Ottawa Hydro rates make electric heating one of the most expensive options in the region. For homes with electric heating, converting to a heat pump is often the most cost-effective upgrade, as it uses electricity but delivers 2 to 3 times more heat energy than it consumes.
Heating system costs depend on the type of system, the size of your home, the complexity of the installation, and whether ductwork modifications are needed.
A mid-efficiency (80 percent AFUE) gas furnace installed in Ottawa costs $3,500 to $5,000 — though these are being phased out in favour of high-efficiency models. A high-efficiency condensing gas furnace (96 to 98 percent AFUE) costs $5,000 to $8,500 installed, with premium brands like Lennox, Carrier, and Trane at the higher end. A modulating furnace with variable-speed blower costs $7,000 to $10,000 installed. Oil furnace installation runs $5,500 to $8,000. A natural gas boiler costs $6,000 to $12,000 installed for a standard unit and $10,000 to $18,000 for a high-efficiency condensing boiler with zone controls. These prices include removal of the old equipment, installation, gas line connection, venting, and commissioning.
A cold-climate air-source heat pump (central ducted) costs $8,000 to $15,000 installed in Ottawa before rebates. A ductless mini-split heat pump system costs $4,000 to $7,000 for a single-zone and $10,000 to $20,000 for a multi-zone (3 to 4 indoor units). A ground-source geothermal system costs $25,000 to $45,000 installed, including the ground loop. After the Canada Greener Homes Grant rebate ($5,000 to $7,100 for ccASHP) and any provincial incentives, the net cost of an air-source heat pump can be as low as $3,000 to $8,000. The payback period on a heat pump upgrade in Ottawa is typically 5 to 8 years when replacing electric heating and 8 to 12 years when supplementing natural gas.
An annual furnace tune-up costs $100 to $200 in Ottawa. Emergency furnace repair typically costs $200 to $600 for common issues (ignitor replacement, blower motor repair, thermocouple replacement). Major repairs like heat exchanger replacement can cost $1,500 to $3,500, at which point replacement of the entire furnace is often more economical if the unit is over 15 years old. Boiler repair costs are similar, with circulator pump replacement running $400 to $800 and expansion tank replacement at $300 to $500.
Several rebate programs make heating system upgrades more affordable for Ottawa homeowners.
The Canada Greener Homes Grant offers up to $7,100 for cold-climate air-source heat pump installation, up to $5,000 for ground-source heat pump systems, and up to $4,000 for high-efficiency furnace or boiler upgrades. The program requires a pre-retrofit and post-retrofit EnerGuide home energy evaluation (about $600 total, partially rebated). The Enbridge Home Efficiency Rebate program offers up to $5,000 for qualifying heating equipment upgrades in homes heated by natural gas. Ottawa Hydro has offered rebates on heat pump installations for electrically heated homes. These programs have specific eligibility requirements and may change, so verify current details with your contractor or the program websites before committing.
To maximize rebates, schedule the pre-retrofit energy audit before making any commitments — wait times for auditors can be 3 to 4 weeks in Ottawa. Choose equipment that is on the program's approved list (your heating contractor should confirm this). Ensure your installer is certified by the equipment manufacturer, as some programs require this. Keep all invoices and serial numbers. Some Ottawa homeowners bundle multiple upgrades (heating, insulation, windows) in a single project to maximize the total rebate from the Greener Homes program.
Heating system installation is regulated work that requires specific licenses, training, and experience.
In Ontario, gas furnace installation requires a G2 or G1 gas fitter license issued by the Technical Standards and Safety Authority (TSSA). Oil heating systems require an OBT (Oil Burner Technician) license. Heat pump installation should be performed by contractors certified by the equipment manufacturer (for example, Mitsubishi Diamond Contractor, Lennox Premier Dealer, or Carrier Factory Authorized Dealer). Verify the contractor carries minimum $2 million general liability insurance and current WSIB coverage. Ask if they hold a refrigerant handling license (required for heat pump work).
Obtain at least three quotes from different heating contractors. Each quote should include a Manual J heat loss calculation for your home (not just a rule-of-thumb equipment sizing), the specific equipment make and model, a breakdown of labour and materials, any required ductwork modifications, electrical upgrades, or permit costs, and the warranty terms for both equipment and labour. Be cautious of contractors who size equipment based only on the size of the existing unit — a proper heat loss calculation accounts for insulation levels, window performance, and air leakage.
Regular maintenance extends the life of your heating system, maintains efficiency, and prevents breakdowns during the coldest days of the year.
Schedule a professional furnace tune-up in September or October before the heating season begins. Replace the furnace filter (standard pleated filters every 3 months, high-efficiency filters every 6 to 12 months). Test your thermostat by setting it 5 degrees above current room temperature and verifying the furnace ignites and runs properly. Check all heat registers and return air vents for obstructions. For heat pump systems, clear debris from around the outdoor unit and verify it enters heating mode when the thermostat calls for heat. Test your carbon monoxide detectors and replace batteries.
Ottawa winter power outages can last hours or even days. Have a plan for heating your home if power fails — a wood-burning fireplace, a generator that can power your furnace blower, or an alternative heating source. Know the location of your furnace's emergency shutoff switch and your main gas valve. Keep your heating contractor's emergency phone number accessible. During extreme cold spells (below minus 25), set your thermostat no lower than 18 degrees Celsius even when away, and open cabinet doors under sinks on exterior walls to prevent pipe freezing.
A high-efficiency condensing gas furnace costs $5,000 to $8,500 installed in Ottawa. Premium modulating furnaces cost $7,000 to $10,000. After Canada Greener Homes Grant rebates (up to $4,000), the net cost can be significantly lower.
A quality gas furnace lasts 15 to 25 years in Ottawa with annual maintenance. Heat exchangers on high-efficiency models typically come with 10 to 20-year manufacturer warranties. Boilers can last 20 to 30 years. Heat pumps typically last 15 to 20 years.
Yes. Modern cold-climate heat pumps work effectively down to minus 25 to minus 30 degrees Celsius. They can reduce heating costs by 20 to 40 percent compared to gas furnaces and 50 to 60 percent compared to electric heating. With the $7,100 federal rebate, the payback period is typically 5 to 8 years.
Furnace sizing depends on your home's heat loss, not just square footage. A proper Manual J calculation considers insulation, windows, air tightness, and Ottawa's design temperature (minus 27 degrees Celsius). A typical Ottawa 2,000-square-foot home needs 60,000 to 100,000 BTU depending on age and insulation levels.
Annual professional maintenance is recommended, ideally in September or October before the heating season. Furnace filters should be checked monthly and replaced every 1 to 3 months depending on the type.
Yes. Any work involving natural gas appliances in Ontario requires a G2 or G1 licensed gas fitter registered with the Technical Standards and Safety Authority (TSSA). Unlicensed gas work is illegal, dangerous, and voids your home insurance.