Replacing a gas furnace with a high-efficiency model typically costs $5,000–$8,000 CAD installed in Canada, based on prices published by Home Depot Canada, Reliance, Enercare and Furnace Store and checked in October 2026. Sixteen Ottawa homeowners who reported what they paid in 2024 and 2025 land on a median of $6,000. Most companies don’t say whether their range includes tax, so ask for the tax line on every quote.
Researched and edited by Gabriel Reyes. Last reviewed: October 2026.
The prices below are for swapping an existing gas furnace for a high-efficiency model (95% AFUE or more), installed:
| Source | Published range (CAD) | Date | What it covers |
|---|---|---|---|
| Home Depot Canada | $4,100–$9,500 before tax | Undated | Standard installation and labour, old unit removed, disposal fees extra |
| Reliance | $4,500–$8,400+ | April 2026 | Installed, by furnace type |
| Enercare (Ontario) | $5,000–$8,000+ | September 2026 | Natural gas, installed, fuel and tanks excluded |
| Furnace Store | $6,500–$7,500 typical; $7,500–$9,500 mid-range; $10,000+ complex | February 2026 | Equipment, labour, permits and code adjustments |
| Ottawa homeowners (Reddit) | Median $6,000; $5,200–$8,300 | 2024–2025 | Prices paid for one gas furnace, installed |
Sources, checked October 2026: Home Depot Canada, Reliance, Enercare, Furnace Store and a r/ottawa thread (user-reported quotes). Only Home Depot says its range is before tax; the others don’t say.
The four companies overlap between $5,000 and $8,000, and 15 of the 16 Ottawa prices fall in that band. The top of each range belongs to specific cases: Furnace Store ties its $10,000+ tier to complex installs, and Reliance and Comfort Union put the top of their ranges on modulating models (see the section on furnace types).
One Toronto installer, Megacity Heating and Air Conditioning, publishes $3,000–$7,000 (updated September 2026). That is below every other source and below what the Ottawa homeowners paid. If a quote lands near the bottom of that range, go through the checklist in the section on comparing quotes before you accept it.
Our page on how we build our price ranges explains how we weigh company prices against what homeowners report paying.
| Province | Typical installed price (CAD) | Sources |
|---|---|---|
| Ontario (ON) | $5,000–$8,000 | 3 companies and 16 Ottawa homeowners |
| Alberta (AB) | $5,500–$8,500 | 3 companies |
| British Columbia (BC) | $5,000–$9,000 | 4 companies |
| Manitoba (MB) | Not enough published prices | 1 installer: $5,500–$8,000+ |
| Saskatchewan and Atlantic Canada | Not enough published prices | None found |
Sources: the companies listed in each section below, checked October 2026. Quebec is outside the scope of this site.
The provinces overlap heavily. Your house and the install move the price more than your province does; the section on what changes your quote covers ductwork, venting and gas lines.
Home Depot lists $4,900–$8,000 across its four models in Ontario, before tax. Enercare publishes $5,000–$8,000+ for a gas furnace installed. LG Home Comfort publishes $4,000–$9,500 (updated September 2026) and gives the same range for every model, size and city, so treat it as an outer edge. The Ottawa homeowners fall inside the middle of all three.
Ontario charges 13% HST on top.
For prices in Toronto, Ottawa and other cities, see our page on furnace cost in Ontario.
Home Depot lists $5,500–$8,800 across its four models in Alberta, before tax. Comfort Union in Calgary publishes $4,980–$8,600 (modified July 2026). Advanpro in Calgary lists $5,800–$8,300 for single-stage and two-stage models on an undated page.
Alberta charges 5% GST.
Calgary has its own page with local installer prices: see furnace replacement cost in Calgary.
Home Depot lists $5,500–$9,500 across its four models in BC, before tax. BC Wide Home Services in Burnaby publishes $5,000–$9,000 before GST (updated September 2026) and says its figures are only guides. Ashton publishes $5,000–$8,000 (first published in 2023, modified July 2026), and EcoPro in North Vancouver lists $4,500–$8,000 for a gas furnace on an undated page. Two of those four pages are old or undated, so lean on local quotes in BC.
Lynn’s in Winnipeg lists $5,500–$8,000+ for a high-efficiency furnace (published December 2025), the only Manitoba price we found. We found no published installed prices for Saskatchewan or the Atlantic provinces; there, start from the national range and collect three quotes.
Home Depot and BC Wide publish prices before tax; most other sources don’t say. Federal and provincial rates on a $6,000 furnace install work out like this:
| Province | Rate | $6,000 becomes |
|---|---|---|
| Alberta, BC, Manitoba, Saskatchewan | 5% GST | $6,300 |
| Ontario | 13% HST | $6,780 |
| New Brunswick, Newfoundland and Labrador, Prince Edward Island | 15% HST | $6,900 |
Source: Canada Revenue Agency, October 2026. Nova Scotia charges 14% HST. British Columbia, Manitoba and Saskatchewan also have provincial sales tax rules that we haven’t confirmed for furnace installs.
Ask each installer to show every tax line, so the total you compare is the total you pay.
A thread on r/ottawa from December 2025 asked what people were paying for a new furnace. Sixteen replies gave a price for one gas furnace installed in 2024 or 2025, and they are the closest thing we found to real quotes:
| Date | Home | Price paid | Detail |
|---|---|---|---|
| Nov 2025 | 1,500 sq ft | $5,200 | 96% furnace and smart thermostat, tax included, 2024 clearance model, installed in under 6 hours |
| Jan 2024 | 1,400 sq ft | $5,300 | Failed on January 1; the seller offered a rental |
| Aug 2024 | About 1,700 sq ft townhouse | $5,500 | 60,000 BTU |
| Sep 2025 | 1,500 sq ft bungalow | $6,000 | Smart thermostat included; three quotes all landed near this price |
| Nov 2025 | Not stated | $6,100 | Tax included, red-tagged furnace, installed the day after the quote |
| Sep 2025 | 1,800 sq ft | $7,000 | After a $400 discount against a competing quote; 10-year parts and labour warranty |
| Dec 2025 | 1,200 sq ft | $8,300 | Red-tagged furnace replaced within 24 hours |
Source: r/ottawa, user-reported quotes, read in October 2026.
These are prices anonymous people in one city said they paid, some of them approximate, with mixed tax treatment: three said tax was included and the rest didn’t say.
The homeowner who collected three quotes saw them cluster around $6,000, so a quote far from the others is the one to question. And the one who paid $7,000 got $400 off by showing a competitor’s quote.
Federal rules set the minimum efficiency for new gas furnaces. According to Natural Resources Canada, a single-phase gas furnace of up to 225,000 Btu/h manufactured on or after July 3, 2019 must reach 95% AFUE (NRCan). The regulation that sets it, SOR/2019-164, lists two exceptions at 80%: furnaces for relocatable buildings, and non-condensing replacement furnaces marked for use in a manufactured home (Canada Gazette). For a house, expect 95% or higher.
Some price pages still show an older standard. Home Depot Canada’s guide says 80% AFUE “is now considered the minimum standard”. Lynn’s in Winnipeg lists an 80% tier at $4,500–$6,000, and EcoPro in North Vancouver lists a standard tier of 80–85% at $4,000–$6,000.
Put the model number and AFUE rating on the quote. If a quote shows 80%, ask the installer which exception applies to your home. Don’t compare an 80% quote with the 95% prices above, even when it’s cheaper.
Installers price furnaces in three steps. Reliance, Comfort Union in Calgary and Advanpro in Calgary all publish installed prices by type:
| Type | Typical installed price (CAD) | Published by |
|---|---|---|
| Single-stage | $4,500–$7,500 | Reliance $4,500–$6,000; Comfort Union $5,500–$7,500; Advanpro $5,800–$6,700 |
| Two-stage | $6,000–$9,000 | Reliance $6,000–$8,000; Comfort Union $6,500–$9,000; Advanpro $6,600–$8,300 |
| Modulating | $8,400–$11,000 | Reliance $8,400+; Comfort Union $8,700–$11,000; Advanpro $9,900–$10,800 |
Sources: Reliance (national, April 2026), Comfort Union (July 2026) and Advanpro (undated), checked October 2026. Prices are for gas furnaces, installed, tax not stated.
Each step up adds roughly $1,500–$2,200 to the middle of the range. Advanpro lists its single-stage and two-stage models at 96% AFUE and its modulating model at 99%, so moving from single-stage to two-stage doesn’t change the rating. One Ottawa homeowner paid $5,500, tax included, for a two-stage 60,000 BTU furnace, which shows that a two-stage model can land close to the single-stage range.
Ask every installer to name the stage type on the quote. A single-stage quote and a modulating quote are different products, and the gap between them can be bigger than the gap between two installers.
Permits, ductwork, gas lines, venting and drains can sit inside the furnace price or on top of it. Three installers price the first two; the rest come from one or two companies:
| Item | Published range (CAD) | Basis |
|---|---|---|
| Permit and inspection | $100–$350 | Comfort Union $100–$300; Megacity $150–$350; EcoPro $200–$300 (gas permit) |
| Ductwork modification | $300–$1,500 | Megacity $300–$1,500; Comfort Union $500–$1,500; EcoPro $500–$1,500 (venting or ducts) |
| Gas line | Examples only | Comfort Union $300–$800 for modification; BC Wide $500–$1,500 for a short new line and $1,500–$3,000+ for a long or difficult one |
| Venting | Example | Comfort Union $300–$800 |
| Condensate drain | Example | Comfort Union $150–$1,000 |
Sources: Comfort Union (Calgary), Megacity (Toronto), EcoPro (North Vancouver) and BC Wide (Burnaby), checked October 2026.
Comfort Union lists these as extras but doesn’t say whether its general range already includes them. Put that question to every installer: is the permit, the gas line, the venting and the old furnace’s removal inside the price, or a separate line? Furnace Store says its typical price includes permits and code adjustments, and Home Depot includes removal of the old unit but charges disposal fees extra, so the answer changes from company to company.
Size of the home. Comfort Union publishes a table by size: $5,500–$6,500 for 1,000 sq ft, $6,500–$7,500 for 1,500 sq ft, $7,500–$9,000 for 2,000 sq ft and $9,000–$11,000 for 2,500 sq ft. No other company publishes a size table, and the Ottawa prices don’t follow Comfort Union’s curve. Ask your installer to explain how they chose the furnace’s capacity for your house.
Urgency. Six of the 16 Ottawa homeowners replaced a furnace in an emergency, and five paid within the normal range. The one who paid $8,300 had the furnace replaced within 24 hours. If your furnace is red-tagged, ask for at least one competing quote before you agree, even if it costs a day.
Three Ottawa homeowners reported what they paid for a furnace and central air installed together: $8,000 for 1,500 sq ft (summer 2025), $9,500 for 1,900 sq ft (June 2025) and $10,000 for 2,300 sq ft (January 2022, tax not included). LG Home Comfort publishes $7,500–$14,000 for a furnace and AC in Ontario, and BC Wide lists $10,000–$18,000 in Burnaby for a furnace paired with a heat pump.
If you are replacing both, ask each installer for a combined price and for the two prices separately, so you can see what the bundle saves. Prices for the air conditioner alone are on our page on central air conditioner cost.
Collect at least three quotes in writing. The Ottawa homeowner who did so found all three close to $6,000, and that agreement is what tells you the market price for your house. Then check each quote against this list:
If your furnace still works and you are weighing a service visit against a replacement, start with our page on furnace maintenance cost.
Reliance publishes monthly rental rates: $75–$90 for a single-stage furnace, $90–$130 for two-stage and $115–$140 for modulating. Reliance doesn’t say whether they include tax. The Ottawa homeowner whose furnace failed on January 1 says the seller tried to offer a rental, so a rental offer can arrive when you are under time pressure. If one does, ask for the purchase price too, and before you sign, ask for the full contract, the buyout price and how long the term runs.
Federal, provincial and gas utility programs change often, and the sources we found gave different amounts for the same program. We don’t subtract any rebate from the prices on this page. Before you sign, check your gas utility’s current program page and your province’s, confirm the amount in writing, and ask the installer whether it applies to the model they quoted.
Installers we checked put a furnace’s life at about 15 years (Enercare) and 20 years or more (Advanpro). Both are company figures; we found no official one. If a repair quote arrives, ask for a replacement quote at the same time so you can compare the two.
If you are considering a heat pump instead, see heat pump vs furnace.
Published prices don’t follow square footage closely enough to give one number. Comfort Union in Calgary lists $7,500–$9,000 for 2,000 sq ft (80,000–100,000 BTU). In Ottawa, homes of 1,200 and 1,800 sq ft paid $6,000 to $8,300. Ask your installer how they sized the furnace, and compare three quotes for your house.
Three installers list a permit and inspection fee: $100–$300 at Comfort Union in Calgary, $150–$350 at Megacity in Toronto and $200–$300 for a gas permit at EcoPro in Vancouver. Whether your city requires one depends on where you live. Ask your installer if they pull the permit and whether the fee is in the quote.
Replacing a gas furnace with a high-efficiency model (95% AFUE or more) in Ontario typically costs $5,000–$8,000 CAD installed, based on prices published by Home Depot Canada, Enercare and Ontario installers and checked in October 2026. Sixteen Ottawa homeowners who reported what they paid in 2024 and 2025 land on a median of $6,000. Ontario…
Replacing a gas furnace with a high-efficiency model in Calgary typically costs $5,500–$8,500 CAD installed, based on prices published by Comfort Union, Air Force Heating, Advanpro, The Gentlemen Pros and Home Depot Canada and checked in October 2026. The City of Calgary requires a permit for every furnace replacement, and some installers include it in…