Quick answer
A new furnace in Canada is usually a several-thousand-dollar project, not just an equipment purchase. Home Depot Canada’s current furnace-installation page lists a national supply-and-install range of roughly CAD $5,500 to $9,000, with an average around $7,500, while noting that the actual price depends on the furnace, home and installation. Treat that as a current market snapshot, not a promise that your house will land inside it.
See Home Depot Canada’s current furnace installation pricing.
The repair side is even harder to reduce to one number. Carrier Canada’s current Canadian repair page gives a broad CAD $200 to $800 furnace-repair range, while stressing that system type, part requirements, age, warranty, accessibility, timing and parts availability all change the bill. Enercare currently lists a $99 + HST one-time furnace diagnostic visit in Ontario before the repair itself.
See Carrier Canada’s HVAC repair pricing guidance and Enercare’s Ontario furnace repair pricing.
The useful decision is therefore not:
“Is my repair over some magic percentage of replacement cost?”
It is:
“What exactly failed, what will the repair restore, what does my warranty cover, how reliable has this furnace been, and what does a properly scoped replacement actually cost at my house?”
That is what the planner below is built to answer.
Furnace repair-or-replace planner
Put your real quotes into context
This is not a replacement score. It compares the facts you actually have - diagnosis, warranty, repair history, quote context and price - without pretending that a 50% rule or one age cutoff can decide the furnace's future.
Planner result
Verify the diagnosis before spending thousands
If the diagnosis itself is uncertain, an expensive repair-versus-replacement comparison is built on sand. A second diagnosis can be more valuable than optimizing the quote math.
1
Get a clear written diagnosis
Ask what failed, how that conclusion was reached, whether the furnace can be safely operated meanwhile, and what the repair would restore.
2
Separate diagnosis from replacement sales pressure
If practical, get another qualified opinion before authorizing a major replacement based on an uncertain failure call.
Add both real local quotes if you want the planner to show the repair-to-replacement percentage. The percentage is context, not a verdict.
This planner is decision support, not a safety inspection, quote guarantee, remaining-life forecast, or instruction to operate equipment that a qualified professional has identified as unsafe.
Furnace replacement cost in Canada: what the published numbers actually mean
Published furnace prices are useful only when you understand what is inside them.
Home Depot Canada’s current national installation page lists approximately $5,500 to $9,000 to supply and install a furnace, averaging about $7,500. Its current product examples range from lower-priced high-efficiency models into more expensive two-stage and variable-speed equipment.
That gives you a useful shopping baseline. It does not mean a contractor is overcharging whenever the quote is above $9,000.
A real replacement can cost more when the project needs work beyond a basic equipment swap, including:
- difficult equipment access
- larger sheet-metal transitions or duct modifications
- venting changes
- condensate drainage changes
- thermostat/control replacement
- electrical changes
- fuel-piping changes
- permits or inspections where required
- asbestos or other legacy-material work
- an equipment-capacity change after a proper load calculation
- a change from furnace-only heating to a heat pump or hybrid system
Even disposal can be treated differently. Home Depot’s installation information notes that removal of the existing furnace is part of the service while disposal fees may still apply depending on the project.
The only price that matters for your decision is the written, local, all-in quote for the scope you are actually buying.
A national price is a benchmark, not a bid
Canada is too large and the housing stock too varied for one number to behave like a quote.
A compact replacement in a newer suburban mechanical room is not the same project as replacing an older furnace in a tight basement while changing venting, controls and duct transitions. Labour markets, travel, permit systems, fuel type and equipment availability also vary by province and city.
Use national pricing to identify obviously incomplete or unusual quotes. Use local written proposals to make the purchase decision.
What should a furnace replacement quote include?
A cheap-looking furnace quote can become expensive once the exclusions appear.
Compare these line items before comparing the total
- Exact furnace manufacturer, model or series, fuel type, input/output capacity and AFUE.
- How the contractor determined the required capacity instead of simply copying the old furnace nameplate.
- Single-stage, two-stage or modulating operation and the blower/control package being supplied.
- Removal of the old furnace and whether disposal is included or extra.
- Supply and return sheet-metal transitions or other duct modifications.
- Venting work and any effect on other appliances that share existing venting or chimney infrastructure.
- Condensate drain, pump or related work for applicable high-efficiency equipment.
- Thermostat or communicating control and whether new wiring is required.
- Gas, propane, oil or electrical work included in the scope.
- Permit and inspection responsibility where your jurisdiction requires them.
- Manufacturer parts warranty, heat-exchanger warranty and contractor labour/workmanship warranty.
- Taxes, financing fees, rental obligations or other charges that are not in the headline number.
If one quote is $1,500 cheaper but excludes half of that list, you are not comparing the same job.
Furnace repair cost: start with the diagnosis, not a parts-price table
Search results are full of component charts that imply a blower motor, gas valve or control board has one predictable Canadian price. They rarely tell you the exact furnace model, local labour rate, warranty status or whether the published number includes diagnosis, travel and tax.
ReadyHome does not publish a national parts menu for that reason.
Current Canadian examples show the scale of the problem:
- Carrier Canada currently publishes an indicative $200 to $800 furnace-repair range, while warning that the actual cost changes with the system and repair.
- Enercare currently lists a $99 + HST one-time diagnostic visit in Ontario before the repair itself.
- Enercare’s current B.C. heating-service information also lists a $99 + HST standard diagnostic rate and $129 + HST for weekends/statutory holidays, again before repair costs.
Those are market examples, not a national tariff.
Why major repair quotes vary so much
A quoted repair is a combination of:
- diagnosis and dispatch
- the exact OEM or compatible part
- labour required to reach and replace it
- testing and commissioning afterward
- warranty coverage
- local taxes
- emergency or after-hours timing
- parts availability
That is why two homeowners can both be told they need a “blower motor” and receive very different estimates.
When a repair is expensive, ask the technician to identify the exact failed assembly and separate parts, labour, diagnostic charges and warranty coverage on the quote.
How long should a furnace last?
Furnace age matters, but it is not an expiry sticker.
Carrier Canada’s current Canadian lifespan guide says a well-maintained furnace can last at least 15 to 20 years, with actual life affected by maintenance, climate, operating hours, comfort settings and equipment condition.
See Carrier Canada’s furnace lifespan guidance.
That makes 15 years a useful planning horizon, not an automatic replacement date.
An older furnace that has been reliable and now needs one isolated repair can still be a repair candidate. A younger furnace with repeated expensive failures, unavailable parts, installation problems or a major safety defect can deserve replacement consideration much earlier.
Age becomes useful when combined with:
- warranty status
- repair history
- current repair scope
- comfort and reliability
- parts availability
- whether the home or heating load has changed
- whether you already intend to change heating technologies
Repair or replace? Use evidence, not the 50% rule
You will see two formulas all over HVAC marketing content:
- replace if the repair exceeds 50% of replacement cost
- multiply furnace age x repair cost, then compare the result with a fixed number
ReadyHome does not encode either formula.
We found no Canadian government, safety-regulator or engineering standard that turns either shortcut into a required replacement rule. More importantly, the formulas ignore facts that can completely change the economics.
A repair quote equal to half the cost of replacement sounds dramatic. But suppose the failed assembly is covered under warranty and most of the quoted total disappears after the manufacturer claim. The percentage was misleading.
The opposite can happen too. A repair may be far below half of replacement cost, yet repeated breakdowns on an aging furnace with poor parts availability can make replacement worth comparing anyway.
Strong reasons to keep repair on the table
Repair deserves serious consideration when:
- the diagnosis is clear
- the problem is isolated
- the furnace has otherwise been reliable
- meaningful warranty coverage remains
- the repair restores normal safe operation
- the replacement quote is poorly defined or based on an unnecessary upgrade
- you are not ready to redesign the heating system and there is no safety reason forcing that decision today
Strong reasons to compare replacement before authorizing repair
Replacement deserves a real comparison when several of these stack up:
- the furnace is later in its service life
- repairs have repeated across recent heating seasons
- a major assembly requires expensive labour or an expensive proprietary part
- parts are obsolete or difficult to obtain
- the furnace still has significant comfort or performance problems after previous repairs
- the home has changed enough that the old equipment size may no longer make sense
- you were already planning a heat-pump, hybrid or cooling-system project
- the repair quote is approaching or exceeding a genuinely comparable local replacement quote
Notice the wording: compare replacement. Not “replace automatically.”
Warranty can completely change the answer
Before making a major repair-versus-replace decision, find the furnace model and serial number and check the actual manufacturer and contractor warranty.
Do not assume:
- every furnace has the same parts term
- labour is included because the part is covered
- the heat exchanger has the same coverage as other components
- registration rules are identical among brands
- coverage transfers automatically when a house is sold
Warranty terms are model-specific and can also be affected by installation date, registration and provincial consumer-protection rules.
The planner intentionally puts possible warranty coverage ahead of the price ratio for this reason.
A $1,500 quoted repair with a major covered component is not the same financial decision as a $1,500 fully out-of-pocket repair.
When one emergency quote is not enough
A dead furnace during a Canadian cold snap is a terrible shopping environment.
If the furnace has been declared unsafe, address that first. But if it is simply unavailable and can safely remain off while you protect people and plumbing, you may have enough room to get another diagnosis or daytime quote before buying a whole system.
Use the stay-warm guide for temporary heating safety and the frozen-pipe prevention guide when the house may cool for an extended period.
A second quote matters most when the first proposal:
- came from an emergency call
- jumps directly from diagnosis to replacement
- does not identify the failed component
- does not explain equipment sizing
- does not itemize installation scope
- does not show warranty terms
- uses urgency as a substitute for details
Do not delay a genuine gas, fire, carbon-monoxide or electrical safety correction just to shop for a better price.
Do not automatically replace the old furnace with the same size
Replacing the old furnace with the same BTU rating feels logical. It can also repeat an old sizing mistake.
The house may have changed since the furnace was installed: insulation, windows, air sealing, additions and ductwork changes can all affect heating demand.
CSA F280 is the Canadian standard used for residential heating and cooling load calculations in code and program contexts. Requirements vary by jurisdiction and project, so ReadyHome does not tell every Canadian homeowner that one specific calculation is legally mandatory for every furnace replacement.
But asking how the contractor determined the new capacity is completely reasonable.
For a concrete current example, BC Hydro’s 2026 whole-home heat-pump rebate requires a heat-load calculation using CSA F280-12 verified software at the home’s design temperature. That is heat-pump incentive eligibility, not a universal furnace-replacement law, but it shows what evidence-based residential sizing looks like.
See BC Hydro’s current heat-pump sizing requirements.
A replacement quote should not become more convincing just because somebody multiplied your square footage by a generic BTU number.
What 95% AFUE actually tells you
Natural Resources Canada’s current Energy Efficiency Regulations set 95% AFUE as the minimum for most standard residential gas furnaces in the regulated class, with defined exceptions such as certain replacement non-condensing, outdoor, space-constrained and relocatable-building products.
See NRCan’s current gas-furnace efficiency requirements.
That means a normal new Canadian gas-furnace comparison often starts in high-efficiency condensing territory. It does not mean every 95% furnace is equivalent.
AFUE does not tell you:
- whether the furnace is correctly sized
- whether the ductwork is adequate
- whether the installation is commissioned well
- whether the controls are appropriate
- whether a more expensive stage/modulating package is worthwhile in your home
- what your actual annual fuel bill will be
Do not accept a projected dollar saving based on AFUE alone unless the estimate also states your actual fuel consumption, local rate, weather/load assumptions and what portion of the fuel use belongs to space heating.
Should you replace a furnace with a heat pump or hybrid system instead?
Sometimes the furnace failure is simply the moment when a larger heating decision becomes worth considering.
That does not mean every gas-furnace owner should abandon gas, and this page is not a furnace-versus-heat-pump manifesto.
A heat pump or hybrid comparison becomes more relevant when:
- your central air conditioner is also near replacement
- you want cooling anyway
- the home already needs a major furnace investment
- your province or utility has a current heat-pump incentive
- electrical capacity has been assessed
- the local climate and operating costs support the change
If the furnace repair is small and the rest of the system is healthy, forcing a whole electrification project into an emergency repair decision can be silly.
If the furnace needs a major replacement and you were likely to replace cooling soon anyway, comparing both strategies before buying another standalone furnace makes much more sense.
Furnace rebates in Canada: verify them now, not from an old blog post
Verified September 10, 2026. Incentive status can change quickly.
The federal Canada Greener Homes Grant is closed. Natural Resources Canada also says July 31, 2026 was the last day to apply to the Oil to Heat Pump Affordability program through the direct federal stream, although previously submitted files continue to be processed. The broader Canada Greener Homes Affordability Program is rolling out through provincial and territorial delivery partners for eligible low-to-median-income households.
See NRCan’s current Canada Greener Homes Initiative status.
Current regional examples show why a national rebate table ages badly:
- B.C.: BC Hydro currently advertises up to $4,000 for eligible heat-pump upgrades replacing electric heating, plus a limited $1,000 bonus for qualifying installations completed and paid between August 1 and October 31, 2026, while funding lasts.
- Saskatchewan: SaskEnergy’s Residential Equipment Replacement Rebate is still active, but eligibility changed on August 17, 2026 and 96.0% to 96.9% AFUE furnaces are no longer eligible. Homeowners need to check the current eligible-equipment list rather than relying on last year’s rebate chart.
See BC Hydro’s current heat-pump rebates and SaskEnergy’s Residential Equipment Replacement Rebate.
The important lesson is not the dollar amount. It is check current eligibility before signing the equipment contract, especially if the replacement decision could shift toward a heat pump, hybrid system or higher-efficiency furnace.
If the technician says the furnace is unsafe
Do not turn a confirmed safety problem into a DIY second opinion.
If a qualified technician or authority has formally shut down or tagged the furnace, get the exact defect and jurisdictional requirement in writing. The next decision may be:
- repair the unsafe component or condition properly
- replace the furnace
- change the heating system entirely
A cracked or failed heat exchanger, for example, is not something a homeowner should inspect, seal, weld or “test” from internet instructions. At the same time, a failed heat exchanger does not automatically prove the only legal or economic remedy is complete furnace replacement; an OEM replacement assembly and warranty coverage may exist.
The economics come after the safe remedy options are established.
What to ask before authorizing a furnace repair
Ask the technician:
- What exactly failed?
- How was that diagnosis confirmed?
- Is the furnace safe to operate while I decide?
- What does the repair quote include?
- Is the failed part covered by a manufacturer or contractor warranty?
- Does the repair restore normal operation, or are there separate problems still present?
- Are parts readily available for this model?
- Would you repair this furnace if replacement were not a sale option today?
That last question is intentionally blunt. The answer can be revealing.
What to ask before authorizing furnace replacement
Ask each contractor:
- What exact furnace are you proposing?
- What capacity is it, and how did you determine that capacity?
- What efficiency and staging does it use?
- What venting, condensate, electrical, gas and duct work are included?
- Are permits and inspections included where required?
- Is removal and disposal included?
- What manufacturer warranty applies to this exact model?
- What labour/workmanship warranty do you provide?
- What is excluded from the quote?
- Is the price cash purchase, financing or rental, and what is the total cost under that structure?
- If I might add or replace cooling soon, should I compare a heat pump or hybrid proposal now?
A contractor who can answer those questions is giving you something you can actually compare.
FAQs
How much does it cost to replace a furnace in Canada?
Home Depot Canada’s current national furnace-installation page lists approximately CAD $5,500 to $9,000, averaging about $7,500 for supply and installation. Your local quote can fall outside that range when equipment, ductwork, venting, controls, access, permits or other project conditions differ.
How much does furnace repair cost in Canada?
There is no single Canadian rate. Carrier Canada currently publishes a broad $200 to $800 furnace-repair range, while current Enercare examples show that the diagnostic visit itself can start around $99 + tax before parts and labour. Use those as context, not as a quote for your furnace.
How long should a furnace last?
Carrier Canada says a well-maintained furnace can last at least 15 to 20 years, while climate, runtime, maintenance, installation and repair history can move actual lifespan in either direction. Fifteen years is a useful planning point, not an automatic expiry date.
Is it worth repairing a 15- or 20-year-old furnace?
Sometimes. An isolated, well-understood repair on an otherwise reliable furnace can still make sense. Major repair cost, repeated breakdowns, parts availability, comfort problems, warranty and a real local replacement quote matter more than age alone.
What percentage of replacement cost is too much to spend on repair?
ReadyHome does not use a universal percentage. The planner can show your repair quote as a percentage of replacement because the arithmetic is useful context, but a fixed 50% cutoff ignores warranty, age, repair history, diagnosis quality and replacement scope.
Should I replace my furnace before it completely fails?
If it is later in its service life, has repeated breakdowns, has difficult parts availability, or you are already planning cooling or a heat-pump project, getting replacement quotes before an emergency can make sense. A reliable furnace does not need to be replaced solely because a birthday passed.
Do furnace replacements qualify for rebates in Canada?
Not under one national rule. Major federal programs have closed or changed, and current incentives are heavily location- and technology-specific. Some current provincial or utility programs favour heat pumps, hybrid systems or very high-efficiency equipment. Verify the program before signing a contract.
Should I get more than one furnace replacement quote?
For a major replacement, usually yes when practical. The real value is not just price competition; multiple proposals expose differences in equipment sizing, venting, ductwork, controls, warranty and what each contractor leaves out.
Methodology and source limits
Methodology
This page was built from September 2026 Canadian SEMrush research plus the supplied Canadian Furnace Decision Research Plan, then reconciled against current Canadian government, utility, retailer and manufacturer sources before implementation.
We kept the dossier’s useful architecture - replacement cost, repair cost, lifespan, quote comparison, warranty and repair-versus-replace decision support - but rejected unsupported precision. ReadyHome does not publish a nationwide component-price table, a universal 50% replacement rule, the age-times-repair-cost formula, a fixed furnace expiry age, universal warranty terms, or old rebate amounts presented as current.
Price examples are dated market snapshots, not estimates for a specific house. The planner uses the homeowner’s own quotes and shows repair-to-replacement percentage only as arithmetic context. It does not predict remaining furnace life or certify that equipment is safe.
Related ReadyHome guides
Sources & further reading
Check the original guidance for details that apply to your home. How we use sources
- Public Safety Canada / Canada.ca
Canadian household outage risks and 72-hour preparedness framing.
- Health Canada
Preventing carbon monoxide exposure
Generator placement, CO exposure, and fuel-burning appliance warnings.