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How much does a furnace replacement cost in Cornwall, ON?

Converted from US national rangeUpdated Prices checked October 20261 source

A furnace replacement costs about CA$3,970 to CA$9,690, typical CA$6,770, using the US national range converted to Canadian dollars. That is HomeAdvisor's US figure ($2,823 to $6,896) at 1.4054 CAD per USD (Bank of Canada, October 20, 2026), not a survey of Cornwall prices.

Converted to Canadian dollars

Low
CA$3,970
Typical
CA$6,770
High
CA$9,690

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Furnace replacement cost in Cornwall, ON

Each row says exactly what the figures are and where they come from.

Furnace replacement cost in Cornwall, ON
EstimateLowTypicalHighBasisChecked
Converted to CADCA$3,970CA$6,770CA$9,690US national range × 1.4054 CAD per USD (Bank of Canada, October 20, 2026). Not a survey of Cornwall pricesOctober 2026
US national range$2,823$4,814$6,896Per system, installed; typical range of customer-reported jobs (HomeAdvisor)October 2026

Furnace replacement cost by type or size

US national figures in USD, as published by each source.

Furnace replacement cost by type or size
Type or sizePrice (USD)Source
Electric furnace$2,000 to $7,000HomeAdvisor
Gas furnace$3,800 to $10,000HomeAdvisor
Oil furnace$6,750 to $10,000HomeAdvisor

What drives the cost of a furnace replacement

Dollar figures in this section are US national figures in US dollars.

  1. Fuel type

    Electric furnaces cost least to install; oil costs the most.

  2. Efficiency rating

    High-AFUE furnaces cost more up front.

  3. Home size

    Furnaces are sized at roughly 30 to 60 BTUs per square foot.

  4. Climate

    Colder regions need more capacity.

  5. Removal of the old unit

    Removal and disposal typically add $150 to $330.

Permits and what's included in Cornwall

Fees quoted here are US figures in US dollars; Canadian permit fees are set by your municipality.

Permit note

Furnace replacement usually needs a mechanical permit, and gas work may need its own. Ask your local building department for the fee.

Rules are set locally; confirm with Cornwall’s building department.

What’s usually included

  • The new furnace
  • Connection to existing ducts, venting and fuel supply
  • Startup and testing

Scopes vary. Get the scope in writing on every quote.

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Top-ranked HVAC contractors in Cornwall

The top 3 of 24 HVAC contractors we rank for Cornwall, ON, by CR Score. Paid placement never changes rank.

  1. #1
    Walker ClimateCare
    CR Score 684.8from 1,508 Google reviews
  2. #2
    Superior Plumbing & Heating of Cornwall
    CR Score 614.3from 74 Google reviews
  3. #3
    Baker Heating & Air Conditioning Ltd.
    CR Score 604.9from 326 Google reviews

See all ranked HVAC contractors in Cornwall

Furnace replacement cost in Cornwall: questions

How much does a furnace replacement cost in Cornwall, ON?

A furnace replacement costs about CA$3,970 to CA$9,690, typical CA$6,770, using the US national range converted to Canadian dollars. That is HomeAdvisor's US figure ($2,823 to $6,896) at 1.4054 CAD per USD (Bank of Canada, October 20, 2026), not a survey of Cornwall prices.

Are these prices in Canadian dollars?

Yes, converted. We have no Canadian price survey for this job, so we show the US national range converted at 1.4054 CAD per USD (Bank of Canada daily rate for October 20, 2026). Local labour, material and tax differences are not reflected.

Do I need a permit for a furnace replacement in Cornwall?

Furnace replacement usually needs a mechanical permit, and gas work may need its own. Ask your local building department for the fee. Rules are set locally, so confirm with Cornwall’s building department.

What affects the cost of a furnace replacement?

Fuel type: electric furnaces cost least to install; oil costs the most. Efficiency rating: high-AFUE furnaces cost more up front. Home size: furnaces are sized at roughly 30 to 60 BTUs per square foot. Climate: colder regions need more capacity.

How many HVAC contractors serve Cornwall?

We rank 24 HVAC contractors for Cornwall, ON by CR Score. Get at least three written quotes for the same scope.

What is usually included in the price?

The new furnace; Connection to existing ducts, venting and fuel supply; Startup and testing. Always get the scope in writing on the quote.

Sources

Checked October 2026. Figures are estimates, not quotes.

  1. HomeAdvisor: Furnace replacement cost · page updated June 17, 2026 · checked October 2026Primary source. Used for: Low, typical and high; prices by fuel; drivers.
  2. Bank of Canada: Daily exchange rates (USD/CAD) · page updated October 20, 2026Used for: Conversion rate 1.4054 CAD per USD.
These are published estimates converted at a stated exchange rate, checked October 2026. They are not quotes. Typical range shown: CA$3,970 to CA$9,690. Editorial policy

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