Furnace installation in Ontario costs between $3,500 and $8,500 in 2026 — with most homeowners landing around $4,500–$6,500 for a standard gas furnace fully installed.
In this guide, you will find every pricing factor broken down clearly:
- cost by furnace type
- efficiency rating, brand
- home size
- city
- the rebates most contractors will not mention, the real long-term savings on your energy bill, and the smartest ways to cut costs without cutting corners.
Average Furnace Installation Cost in Ontario (2026 Update)
The average furnace installation cost in Ontario sits between $4,000 and $6,500 for a mid-range gas furnace with standard installation in 2026.
That price includes the unit, labor, removal of the old furnace, and basic permitting — but not major ductwork changes.
| Scenario | Estimated Total Cost (Installed) |
|---|---|
| Basic gas furnace — small home or condo | $3,500–$5,000 |
| Mid-range gas furnace — average home | $4,500–$6,500 |
| High-efficiency gas furnace (96%+ AFUE) | $5,500–$8,500 |
| Premium brand, large home (3,000+ sq ft) | $8,000–$12,000+ |
| Fuel conversion (oil or electric to gas) | Add $1,500–$3,500 |
Cost Breakdown of Furnace Installation in Ontario
The total furnace installation cost in Ontario is made up of several components. Most contractors quote a bundled price — always ask for an itemized breakdown so you can compare quotes properly.
- Furnace unit: $1,500–$5,500 depending on type and efficiency
- Labor — standard install: $1,200–$2,500
- Labor — complex install (ductwork, venting changes): $2,500–$4,500+
- Removal of old furnace: $150–$400
- Permits and inspections: $100–$300
Furnace Installation Cost by Type (Gas, Electric, Oil)
Gas Furnaces
Gas is the most popular choice in Ontario — lower operating costs and wide availability make it the go-to for most homeowners.
- Standard (80% AFUE): $2,500–$3,800 (unit only)
- Mid-efficiency (90–95% AFUE): $3,500–$5,200
- High-efficiency (96%+ AFUE): $4,500–$7,500+
Electric Furnaces
Electric furnaces cost less upfront but more to run due to Ontario electricity rates. Best for condos or homes without gas access.
- Standard electric: $1,800–$3,500
- High-efficiency electric: $3,000–$5,000
Oil Furnaces
Mostly found in rural Ontario. Higher fuel and Furnace maintenance in Ontario costs make them less practical long-term — many homeowners are converting to gas or heat pumps.
- Standard oil: $3,200–$5,500
- High-efficiency oil: $4,800–$7,200
| Fuel Type | Installed Cost | Avg. Annual Running Cost |
|---|---|---|
| Gas — high-efficiency | $4,500–$7,500 | $800–$1,200 |
| Gas — standard | $2,500–$4,500 | $1,100–$1,500 |
| Electric | $1,800–$5,000 | $1,400–$2,200 |
| Oil | $3,200–$7,200 | $1,600–$2,400 |
High-Efficiency Furnace Installation Cost in Ontario
A high-efficiency furnace (96%+ AFUE) costs $5,500–$8,500 installed in Ontario in 2026. That is $1,000–$2,500 more than a standard unit upfront — but the savings on your monthly gas bill often recover that gap within 5–8 years.
High-efficiency models also qualify for government rebates that can reduce your net cost by $250–$5,000+.
Cost to Replace an Old Furnace in Ontario
The furnace replacement cost in Ontario ranges from $3,500 to $8,500 in 2026. Replacement is usually cheaper than a brand-new installation because existing ductwork and venting can often be reused.
- Direct replacement (same fuel type): $3,500–$7,500
- New installation (no existing system): $5,000–$10,000+
- Fuel-type conversion (e.g., oil to gas): $5,000–$11,000
If your furnace is over 15 years old and has needed furnace repairs in the past two years, replacement almost always makes more financial sense than continuing to fix it.
New Furnace Installation vs Furnace Replacement Cost
| Scenario | Cost Range | Key Factor |
|---|---|---|
| Straight replacement (same fuel type) | $3,500–$7,500 | Reuses existing ducts and venting |
| New install (no existing system) | $5,000–$10,000+ | Requires full duct and venting setup |
| Fuel conversion (oil/electric to gas) | $5,000–$11,000 | New gas line, venting, and permits needed |
A straight swap of a like-for-like gas furnace is the most affordable path. The cost jumps significantly when infrastructure changes are required.
Furnace Installation Cost by Home Size
| Home Size | BTU Needed | Estimated Installed Cost |
|---|---|---|
| Under 1,000 sq ft | 40,000–50,000 BTU | $3,000–$5,000 |
| 1,000–1,500 sq ft | 55,000–65,000 BTU | $3,500–$5,500 |
| 1,500–2,500 sq ft | 70,000–90,000 BTU | $4,500–$7,000 |
| 2,500–3,500 sq ft | 100,000–120,000 BTU | $6,000–$9,000+ |
Labor Costs for Furnace Installation in Ontario
Labor makes up 25–35% of total furnace installation cost in Ontario. Rates are highest in Toronto and the GTA and 10–20% lower in smaller cities.
- Standard installation: $1,200–$2,000
- Complex install (new venting, ductwork changes): $2,000–$4,500
- Emergency or same-day installation: Add 20–30%
Always confirm your contractor is TSSA-certified. In Ontario, gas furnace work must legally be performed by a TSSA-licensed technician. Hiring someone unlicensed voids your manufacturer warranty, fails municipal inspections, and creates serious carbon monoxide safety risks.
Furnace Installation Cost by Brand and Model
| Brand | Tier | Installed Cost Range |
| Lennox | Premium | $6,500–$10,000+ |
| Carrier | Premium | $6,000–$9,500 |
| Trane | Premium | $6,000–$9,500 |
| York | Mid-range | $5,000–$7,500 |
| Bryant | Mid-range | $4,500–$7,000 |
| Goodman / Amana | Budget-friendly | $3,500–$6,000 |
Energy-Efficient Furnace Cost vs Standard Furnace Cost
High-efficiency furnaces cost more upfront. But when you factor in 10–15 years of operating costs, the math often flips. Here is a real comparison for a typical Ontario home (2,000 sq ft):
| Standard (80% AFUE) | High-Efficiency (96% AFUE) | |
| Installed cost | ~$4,000 | ~$6,500 |
| Annual gas bill | ~$1,400 | ~$900 |
| 10-year energy cost | ~$14,000 | ~$9,000 |
| 10-year total | ~$18,000 | ~$15,500 |
Over a decade, the high-efficiency furnace saves roughly $2,500 — even before rebates. If you plan to stay in your home for 10 or more years, the high-efficiency option is almost always the smarter investment.
Ductwork and Additional Installation Costs
Many homeowners underestimate what ductwork adds to the final bill. If your ducts are old, damaged, or incompatible with a new high-efficiency furnace, expect additional charges.
- Duct inspection: $100–$300
- Minor duct sealing/repairs: $300–$700
- Partial duct replacement: $1,000–$2,500
- Full ductwork replacement: $3,000–$8,000
- New venting (for high-efficiency units): $300–$800
Modern high-efficiency furnaces use PVC flue pipes instead of traditional metal venting. In older Ontario homes, this often means new exhaust and intake piping — a cost many quotes leave out until the job starts.
Permits and Inspection Fees in Ontario
Ontario law requires a permit for all furnace installations involving a gas connection. This applies to both new installs and replacements. Your contractor should pull the permit on your behalf — if they say it is not needed, that is a serious red flag.
- Building permit: $100–$300 (varies by municipality)
- Gas inspection: $100–$200 (sometimes included in the labor quote)
- TSSA inspection: Often included in the contractor’s price
Factors That Affect Furnace Installation Cost
- Furnace type and AFUE rating: higher efficiency means higher upfront cost
- Home size and BTU capacity required: larger homes need more powerful units
- Existing ductwork condition: repairs or replacements add significant cost
- Fuel type conversion: switching from oil or electric to gas adds $1,500–$3,500
- Brand and model selected: premium brands cost 20–40% more than budget-friendly ones
- Location in Ontario: Toronto and GTA labor rates are highest
- Time of year: peak heating season (Oct–Jan) drives prices up
- Contractor licensing: TSSA-certified technicians cost more, but it is non-negotiable
How Much Does It Cost to Install a Furnace in a Condo vs House?
Condo furnace installations are generally less expensive than detached homes, mainly because of smaller space and simpler ductwork.
| Property Type | Typical Size | Estimated Installed Cost |
| Condo / apartment | Under 900 sq ft | $3,000–$5,500 |
| Townhouse | 1,000–1,800 sq ft | $4,000–$6,500 |
| Semi-detached home | 1,200–2,200 sq ft | $4,500–$7,000 |
| Detached home | 1,800–3,500+ sq ft | $5,000–$10,000+ |
Condos come with added complications: many buildings require board approval before HVAC work, and some restrict unit types or venting methods. Always check with your condo corporation before getting quotes.
Furnace Installation Cost in Toronto vs Other Ontario Cities
| City | Estimated Installed Cost (mid-range gas furnace) |
| Toronto / GTA | $5,000–$8,500 |
| Ottawa | $4,500–$7,500 |
| Hamilton | $4,000–$7,000 |
| London | $4,000–$6,500 |
| Kitchener-Waterloo | $3,800–$6,500 |
| Windsor / Smaller Cities | $3,500–$6,000 |
Toronto commands the highest prices due to higher labor costs and contractor demand. Rural areas may offer lower quotes but with fewer contractor options and longer service windows.
Financing Options for Furnace Installation in Ontario
- Canada Greener Homes Loan: interest-free financing up to $40,000 for energy upgrades including high-efficiency furnaces
- Enbridge Home Efficiency Rebate+: up to $1,500 back on qualifying high-efficiency furnaces; up to $10,000 for heat pump upgrades
- Oil to Heat Pump Affordability Program: up to $10,000 for homes converting from oil heating
- Contractor financing: many Ontario HVAC companies offer 0% deferred payment for 12 months
- HELOC (Home Equity Line of Credit): often lower interest rates than contractor financing for larger jobs
Signs You Need a New Furnace Installation
- Age over 15–20 years: most furnaces last 15–25 years; older units lose efficiency fast
- Frequent breakdowns: two or more Furnace repairs in two years is usually the tipping point
- Rising gas bills: if your heating costs are climbing with no change in usage, efficiency is dropping
- Uneven heating: some rooms too hot, others cold is a sign the system is struggling
- Yellow or flickering pilot light: should always be blue; yellow may indicate a carbon monoxide leak
- Strange noises: banging, rattling, or popping can signal a failing heat exchanger
- Excess dust or dry air: older furnaces lose the ability to filter and humidify properly
How to Save Money on Furnace Installation in Ontario
- Get at least 3 itemized quotes: prices vary widely between contractors for the exact same job
- Book off-season: spring and summer installs often come with better pricing and faster scheduling
- Bundle with AC replacement: combining both saves $1,500–$2,500 in labor
- Apply for rebates before you start: some programs require a pre-audit; you cannot apply retroactively
- Choose a mid-range brand: Goodman or Bryant offer comparable reliability at 15–20% less than premium names
- Avoid HVAC rental programs: rental agreements can cost 2–3 times the purchase price over 10 years
- Ask about carry-over inventory: contractors sometimes discount last-year models to clear stock
Furnace Installation Cost vs Long-Term Energy Savings
The real question is not just what installation costs today — it is what the decision costs over 15–20 years. Use this formula:
Total Cost of Ownership = Installation Cost + (Annual Energy Cost × Years) − Rebates
| Furnace Type | Install Cost | Annual Energy | 15-Year Total | After Rebates |
| Standard gas (80% AFUE) | $4,000 | $1,400/yr | ~$25,000 | ~$25,000 |
| High-efficiency (96% AFUE) | $6,500 | $900/yr | ~$20,000 | ~$18,500 |
| 📊 Over 15 years, choosing a high-efficiency furnace over a standard model saves the average Ontario homeowner approximately $5,000–$7,000 — even after the higher upfront cost. |
If you are planning to stay in your home long-term, high-efficiency is the financially stronger choice. If you are selling within 3–5 years, a mid-efficiency unit is likely the smarter short-term spend.
Summary: What to Budget for Furnace Installation in Ontario (2026)
| Most Ontario homeowners pay $4,500–$7,000 for a mid-range to high-efficiency gas furnace fully installedHigh-efficiency models cost more upfront but save thousands over 10–15 yearsAlways use a TSSA-certified contractor and make sure permits are includedApply for rebates before booking — some require a pre-installation energy auditGet at least 3 itemized quotes and ask each contractor for a proper heat load calculation |
Frequently Asked Questions
How much does furnace installation cost in Ontario in 2026?
The average furnace installation cost in Ontario is $4,000–$6,500 for a standard gas furnace with professional installation. High-efficiency models run $5,500–$8,500 installed.
How long does a furnace installation take?
A standard furnace replacement typically takes 4–8 hours. Complex installs involving ductwork or venting changes can take a full day.
Do I need a permit for furnace installation in Ontario?
Yes. Ontario law requires a permit for all gas furnace installations. Your contractor should apply for it on your behalf. Unpermitted work can void your insurance and cause issues when you sell your home.
What is the best furnace brand in Ontario?
Lennox, Carrier, and Trane are top-tier. For solid performance at a lower price, Goodman and Bryant are widely used and trusted by Ontario contractors.