A new high-efficiency furnace in the GTA in 2026 typically lands between $4,300 and $7,000 installed, with most replacements clustering around $4,500 to $6,500. The wide range reflects real differences — single-stage vs. modulating, ductwork condition, venting changes, permits, and removal of the old unit. This guide breaks down every line item so you can compare quotes accurately and avoid lowball bids that hide costs in change orders.
2026 GTA Furnace Pricing at a Glance
- Single-stage 95% AFUE furnace, standard install: $3,800 – $5,000
- Two-stage 96–97% AFUE furnace, standard install: $4,500 – $6,000
- Modulating 97–98% AFUE furnace with ECM blower, standard install: $5,800 – $7,500+
- Furnace + AC combo replacement: $7,500 – $11,500 (significant labour overlap savings vs. doing them separately)
- Premium brands (Lennox SLP98V, Carrier Infinity 98, Trane S9V2): typically a $500–$1,500 premium over equivalent base brands
Why Toronto and the GTA Run 5-10% Higher Than the Provincial Average
Three reasons. First, GTA labour rates for licensed gas technicians are higher — both in hourly rate and in dispatch overhead due to traffic. Second, Toronto's older housing stock often requires venting modifications, ductwork repairs, or chimney liners that suburbs with newer construction don't. Third, permit costs vary by municipality (typical range $100–$300), and Toronto's process is more involved than smaller cities.
What's Included in a Standard GTA Furnace Quote
- Removal and disposal of the existing furnace ($150–$400 value)
- New furnace cabinet, gas valve, blower, control board, and venting kit
- Standard PVC vent pipe (up to 25 feet) for high-efficiency models
- Gas line connection and leak test
- Thermostat reconnection (or basic programmable thermostat upgrade)
- Building permit and TSSA inspection coordination
- Workmanship warranty (typically 1–2 years labour) plus 10-year parts from manufacturer
- Final commissioning, combustion analysis, and homeowner walkthrough
Hidden Costs That Surprise GTA Homeowners
- Permit and TSSA inspection: $100 – $300 depending on municipality (already included in most quotes — confirm)
- Old furnace removal and disposal: $60 – $500 if not bundled
- Ductwork modifications or repairs: $200 – $1,000 (older Toronto homes especially)
- Chimney liner for water heater (required when going from mid-efficiency to high-efficiency furnace, since the WH can no longer share the chimney): $400 – $900
- Electrical upgrades for ECM blowers or smart thermostats: $150 – $800
- Concrete pad or slab levelling: $100 – $300
- Carbon monoxide detector installation if missing (legally required): $50 – $150
- After-hours / emergency surcharge if installed outside business hours
Furnace Type Comparison — Pay More Up Front, Save Long Term
- Single-stage: cheapest install, runs at 100% only. Cycles more, slightly less comfortable, lowest efficiency tier
- Two-stage: runs at low (~65%) most of the time, kicks high in cold snaps. Quieter, more even temperatures, ~5% lower bills than single-stage
- Modulating + variable-speed: continuously adjusts output 40–100%. Quietest, most even temperatures, best dehumidification, ~15% lower bills than single-stage. Ideal pairing with a heat pump in a hybrid system
How Much Will You Save vs. an Old Furnace?
If you are replacing a 15+ year old 80% AFUE mid-efficiency unit with a modern 96% AFUE high-efficiency furnace, expect 20–25% lower gas usage. For a typical Toronto home spending $1,800/year on gas heat, that's $360–$450/year saved. Over 15 years, that adds up to $5,400–$6,750 in lower bills — often more than the entire upgrade cost.
Stacking Rebates in 2026
Direct furnace rebates are limited in 2026 because Ontario's incentive policy has pivoted toward electrification. However, smart thermostats included in your install qualify for $75 under the Home Renovation Savings Program, and bundling your furnace with a heat pump into a hybrid system unlocks the full $500–$1,250 per ton heat pump rebate. See our [Ontario HVAC rebates 2026 guide](/blog/ontario-hvac-rebates-2026-complete-guide) for the full breakdown — your installer should structure the project to capture every available dollar.
How to Get an Accurate Quote (and Avoid Bait-and-Switch Pricing)
- Insist on an in-home assessment before any quote is finalized — over-the-phone quotes are not real quotes
- Get the model number, AFUE rating, blower type, warranty terms, and stage (single/two/modulating) in writing
- Confirm permit cost is included, not extra
- Ask whether the chimney liner for your water heater is included if you're going high-efficiency
- Ask for a fixed-price quote, not 'starting at' pricing
- Get 2–3 quotes from licensed contractors. Throw out the lowest bid if it's more than 15% below the others — that's where hidden change orders hide
Furnace Repair vs. Replacement — When to Stop Fixing
If your furnace is over 15 years old and a single repair quote exceeds 50% of replacement cost, replace. If it is under 10 years old and the repair is a sensor, ignitor, or blower motor, repair. We've covered the math in detail in [furnace repair vs. replacement: a cost guide for GTA homeowners](/blog/furnace-repair-vs-replacement-cost-guide) and the warning signs in [when to replace your furnace](/blog/when-to-replace-your-furnace-7-warning-signs).
Get a Real Quote for Your GTA Home
Every GTA home is a little different — chimney configuration, ductwork condition, gas line size, and venting routes can move pricing $1,000+ either way. ZK Mechanical provides free in-home assessments across Toronto, Mississauga, Brampton, Oakville, Burlington, Hamilton and the rest of the GTA, with all-in fixed pricing and TSSA-licensed gas technicians on every install. [Request a free quote](/contact) and we'll send a real number based on your home, not an internet estimate.
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