# Furnace Installation Toronto | Code-Compliant Installs

URL: https://bestfurnacerepairtoronto.ca/furnace-installation-toronto/

![Technicians positioning and levelling a new gas furnace during installation in a Toronto basement](/images/misc/technicians-setting-a-new-gas-furnace-onto-a-level.webp)

TSSA-Licensed Gas Technicians Since 2005

# Furnace Installation Toronto: Right-Sized, Code-Compliant, ESA-Verified New Furnace Installs

Last updated: September 16, 2026

Right-sized installs with ECM blower and staging options, venting, and Ontario Building Code compliance.

Call Now: (416) 555-0100

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$3,500 to $8,500 CAD installed

## Why Toronto Homeowners Call Us

-   TSSA G1 and G2 licensed technicians
-   20+ years of GTA furnace service
-   Diagnostic waived on same-visit repair
-   Written repair-vs-replace recommendation

**20+ Years** GTA Furnace Experience

**5-Star** Customer Satisfaction

**4-Hour** Emergency Response

**TSSA Licensed** G1 and G2 Certified

Are you sitting in a chilly room right now wondering if your old heating system is finally calling it quits? We know how stressful it can be to face a major home upgrade in the middle of a freezing Canadian winter.

The good news is that setting up a new heating system does not have to be a headache.

Our team is going to walk you through the exact steps we use for a successful furnace installation Toronto homeowners can rely on, and I think you will be surprised at how clear the whole process actually is. So, grab a warm cup of coffee, and let’s go through everything you need to know to make a smart choice for your home.

## What Is a Code-Compliant Furnace Installation in Toronto?

A proper, legal setup in Toronto goes far beyond just swapping out a metal box in your basement.

We always make sure the job complies with the latest rules, including the strict CSA B149.1 (2025 Edition) and its 2026 amendments. This means your new gas furnace is sized, mounted, vented, and wired by a certified TSSA G1 or G2 technician.

Every home in Canada must now meet a federal minimum efficiency rating of 95% AFUE for new residential gas furnaces.

-   **Federal Efficiency Standards:** The 95% AFUE rating ensures that 95 cents of every dollar you spend on gas turns directly into heat for your family.
-   **Municipal Approvals:** Our technicians verify that your setup meets Ontario Building Code Part 6 and includes a legal municipal permit.
-   **New CO Alarm Laws:** Ontario Regulation 87/25 now requires a working CO alarm on every single storey of a home with a gas furnace.

We take this seriously and check your alarms during the mandatory commissioning process. A complete job finishes with a combustion analysis, a CO verification check, and a static duct pressure reading.

> The total installed cost runs between $4,000 and $8,500 CAD depending on the efficiency and complexity of the job.

![Technician recording a heat-loss calculation beside exposed ductwork before installing a new furnace](/images/maps/technician-measuring-return-duct-dimensions-and-re.webp)

## 5 Things That Decide Whether an Install Performs

You might buy the most expensive equipment on the market, but its actual performance depends entirely on how it is put together.

We see homeowners make the same expensive mistakes because they skip crucial planning steps. A flawless setup requires attention to five major details.

Here are the five factors that guarantee your new heater works perfectly:

1.  **Heat-loss sizing.** The exact BTU rating must come from a proper Manual J calculation. Oversizing causes short cycling, uneven floor temperatures, and early wear on ignition parts.
2.  **Return air capacity.** Older Toronto homes routinely suffer from undersized return vents. High static pressure will kill a blower motor and starve the airflow, regardless of the unit’s brand.
3.  **Venting path.** A condensing unit requires ULC S636 certified venting with the correct slope and support. PVC pipe safely handles exhaust temperatures up to 65ºC, while CPVC is required for hotter exhaust up to 90ºC. Mixing different brands of pipe or cement violates code and voids the warranty.
4.  **Gas line capacity.** Your existing pipe must supply the new unit’s input rating at the required pressure, even with every other gas appliance in the house running.
5.  **Commissioning.** An untested furnace is a massive question mark. Manifold pressure, temperature rise, combustion efficiency, and CO levels all get measured and officially recorded before we leave.

## Equipment Choices That Actually Change the Result

Picking the right machinery can feel overwhelming with all the technical jargon out there.

We find that focusing on the specific features that directly affect your comfort and electricity bill makes the decision much easier. The type of burner and the blower motor inside the cabinet are the two biggest game changers.

### Single-Stage and Two-Stage Options

Single-stage models run at one constant speed, which makes them the most affordable option.

These units are perfectly reasonable for a small, tightly insulated house. Two-stage units are usually the sweet spot for most families.

They run at roughly 65 percent capacity most of the time and only kick into high gear during severe cold snaps. Longer, gentler heating cycles naturally even out the temperature between floors. This completely solves the common cold-basement complaints we hear in larger Vaughan, Richmond Hill, and Brampton homes.

### Modulating Burners and ECM Blower Motors

Modulating models feature a special gas valve that adjusts the flame output continuously. They deliver the tightest temperature control and the quietest operation, though they do carry the highest upfront price tag.

The blower motor is the other half of the comfort equation.

A variable-speed Electronically Commutated Motor (ECM) uses brushless DC technology to maintain steady airflow even as your air filter loads up with dust. These smart motors consume around 400 kWh per year compared to the 1,000 kWh used by an older permanent split capacitor (PSC) motor. That efficiency easily saves you $80 or more annually on your Toronto Hydro bill, especially if you run the fan continuously for better air filtration.

## How Much Does Furnace Installation Cost in Toronto?

Budgeting for a major home repair is often the most stressful part of the process.

We want to be completely transparent about where your hard-earned money is actually going. A standard setup in the Greater Toronto Area usually ranges from $3,500 to $8,500 CAD.

The exact price heavily depends on the unit you select, the length of the new exhaust pipes, and the physical access to your mechanical room. A straight swap in a wide-open suburban basement in Maple sits at the lower end of that spectrum. A condensing conversion hidden in a narrow heritage home with a long, complicated vent run will naturally sit much higher.

Here is a quick breakdown of common extra costs:

-   **Labor:** About 25 to 35 percent of the total bill, usually around $1,200 to $1,500, covers the expertise of a licensed technician.
-   **Duct sealing and inspection:** Quoted separately at $299 to $899 CAD if your old sheet metal is leaky.
-   **Smart thermostats:** Installation runs $199 to $549 CAD for homes that need new staging wires or a dedicated C-wire.

## When Installation Is the Right Word, Not Replacement

There is a distinct difference between putting in a brand-new system from scratch and simply swapping out an old one.

We use the term installation when dealing with a completely blank slate. This applies to new custom builds, home additions, basement finishing projects that relocate the mechanical room, or a first-time upgrade from electric baseboards. In these fresh scenarios, there is no existing unit to use as a baseline, so the heat-loss calculation carries the entire weight of the sizing decision.

If you simply need to swap an aging heater for a similar model, you will want to look at our guide on 

furnace replacement

[/furnace-replacement-toronto/ →](/furnace-replacement-toronto/)

. Sometimes, your main goal is chasing better energy efficiency and cashing in on local utility rebates. If that sounds like your situation, check out the details on a 

high-efficiency furnace conversion

[/high-efficiency-furnace-toronto/ →](/high-efficiency-furnace-toronto/)

. For a complete list of our service bands and pricing across the city, see our main page for 

furnace repair Toronto

[/ →](/)

. A reliable furnace installation Toronto upgrade will keep your family warm for years to come.

Published CAD Pricing

## How Much Does Furnace Installation Cost in Toronto?

These ranges are published, not quoted on request. Every invoice itemises the diagnostic fee, parts, labour, and disposal separately.

| Scope of Work | Cost (CAD) |
| --- | --- |
| Mid-Efficiency Furnace Installation (80% AFUE) | $3,500 to $5,500 |
| High-Efficiency Furnace Installation (95%+ AFUE) | $5,500 to $8,500 |
| Duct Sealing and Inspection | $299 to $899 |
| Thermostat Installation | $199 to $549 |
| Full Ductless Split System | $4,500 to $9,500 |

Installed pricing covers the unit, venting, gas and electrical connection, permit, and commissioning. Duct modifications and thermostat upgrades are quoted separately when the assessment shows they are needed.

Why Us for This Job

## Why Choose Best Furnace Repair Toronto for Furnace Installation

### 20+ Years of Furnace Repair Experience

We spend our weeks repairing badly installed furnaces, which is the best possible education in how to install one properly.

### Sized on a Calculation

Heat loss, duct capacity, and static pressure decide the BTU rating. Oversizing is the most common installation error in the GTA.

### Venting Done Right

System 636 polypropylene or PVC venting routed and supported to code, with the condensate path planned before the unit is set.

### ESA-Verified Electrical

Electrical connections completed to Electrical Safety Authority requirements, not improvised off the nearest junction box.

### Commissioned and Documented

Combustion analysis, CO verification, static pressure, and a full staging cycle test, recorded on the service file.

### One Crew, One Day

Most installs are completed in a single working day by the same two-person crew that started the job.

From Call to Verified Repair

## How Our Toronto Furnace Diagnostic Process Works, 5 Steps

01

### Site Assessment

Heat-loss calculation, duct capacity and static pressure, venting path, clearances, gas line sizing, and electrical supply.

02

### Equipment Selection in CAD

Single-stage, two-stage, or modulating options with ECM blower choices, quoted with installed CAD costs and rebate eligibility.

03

### Permit and Preparation

Municipal permit filed, equipment ordered, and the install date confirmed, usually within 3 to 5 business days.

04

### Installation Day

Unit set and levelled, venting run, gas piping and electrical connected, condensate drain fitted, plenum transitions sealed.

05

### Commissioning and Handover

Combustion analysis, CO verification, airflow and static pressure check, thermostat staging test, and written warranty documentation.

## Need Furnace Installation in Toronto or the GTA?

Same-day dispatch, TSSA-licensed technicians, and the diagnostic fee waived when you authorise the repair on the same visit.

(416) 555-0100

[tel:+14165550100 →](tel:+14165550100)

 

Send a Message

[/contact/ →](/contact/)

Free Tool

## Try Our Free Furnace & Heat Pump Sizing Calculator (BTU)

### Furnace & Heat Pump Sizing Calculator (BTU)

Estimate the heating capacity a room or addition needs, so you can size a furnace zone, a cold-climate heat pump, or a supplemental heater correctly before you call for a quote.

[Furnace & Heat Pump Sizing Calculator (BTU) →](/tools/btu-calculator/)

The Honest Conversation

## What Actually Stops Toronto Homeowners From Calling a Furnace Technician

The four hesitations we hear most often before a furnace installation booking, answered plainly.

“The diagnostic fee feels like a trap.”

Our diagnostic starts at $99 CAD and is waived when you authorise the repair on the same visit. It covers a full combustion analysis, a CO check, and a written fault report you keep either way.

“You cannot tell if the technician is really licensed.”

Ontario requires TSSA G1 or G2 certification for gas furnace work. Ours hold both, and certificate numbers appear on every invoice per B149 fuel code so you can verify them on the TSSA public registry.

“Nobody will publish the price.”

Every CAD range for this service is published on this page, above. Scope named, itemised into diagnostic, parts, labour, and disposal, with no quote form in the way.

“How do I know the work will not fail again next month?”

Combustion analysis is re-run and the CO reading verified before we leave, and the parts and labour warranty is issued in writing, typically 1 to 5 years depending on the part and manufacturer.

Our Work

## Furnace Installation Jobs Across the GTA

Click any image to view it larger.

 

Customer Feedback

## What Customers Say About Our Furnace Installation

> “Basement finishing project needed the furnace relocated and reinstalled. The furnace installation was properly sized, the new venting run is clean, and the permit went through the first time.”

M Marta W. Toronto (Leaside)

> “Previous installer had oversized the unit and the upstairs never held temperature. The replacement was sized on an actual heat-loss calculation and the difference is obvious.”

I Ibrahim Q. Richmond Hill

> “Two-stage install with an ECM blower. Quieter than the old unit by a wide margin, and they ran the full staging test with me standing there watching the readings.”

K Kelsey R. Markham (Cornell)

Straight Answers

## Furnace Installation Questions, Answered

### How much does furnace installation cost in Toronto?

Mid-efficiency 80% AFUE installation runs $3,500 to $5,500 CAD and high-efficiency 95% AFUE runs $5,500 to $8,500 CAD, including venting, gas and electrical connection, permit, and commissioning. Duct sealing at $299 to $899 CAD and thermostat work at $199 to $549 CAD are quoted separately when needed.

### What size furnace does my Toronto home need?

It comes from a heat-loss calculation based on floor area, envelope, window area, insulation, and exposure, cross-checked against duct capacity. Rule-of-thumb sizing by square footage is how homes end up with oversized furnaces that short-cycle and heat unevenly.

### What happens if a furnace is oversized?

It reaches thermostat setpoint quickly and shuts off, so it runs in short bursts. That means temperature swings, uneven heat between floors, more wear on ignition components, and more thermal stress on the heat exchanger. The fix is correct sizing at installation, not a bigger unit.

### Do I need a permit to install a furnace in Ontario?

Yes. A municipal permit is required and we file it for your address. Gas work must be performed by a TSSA G1 or G2 licensed technician and electrical connections must meet Electrical Safety Authority requirements.

### Is a two-stage or modulating furnace worth the extra cost?

In larger or multi-level GTA homes, usually yes. Two-stage heating runs longer at lower output, which evens out temperature between floors and reduces the noise of full-output starts. In a small, well-insulated home the comfort gain is smaller and single-stage is reasonable.

### What is an ECM blower and why does it matter?

An electronically commutated motor varies speed instead of running flat out, which cuts electricity use, reduces noise, and maintains airflow against changing filter and duct conditions. It is standard on high-efficiency units and a meaningful comfort upgrade over an older PSC motor.

### How long does the installation take?

A same-configuration install takes 6 to 8 hours. Converting from mid-efficiency to a condensing unit, which needs a new venting run and a condensate drain, can run a day and a half depending on the routing.

### Can you install a furnace in a tight heritage basement?

Yes. Narrow-clearance mechanical rooms in The Annex, Cabbagetown, and Riverdale are routine. Clearance and the venting path are measured before the unit is specified, because physical fit and vent routing decide the model as much as BTU rating does.

### Will a new furnace work with my existing ducts?

In most homes yes, once static pressure and return capacity are checked. Undersized returns are common in older Toronto homes and cause high static pressure, which shortens blower life. If duct work is needed it is quoted separately before installation.

### What maintenance does a new furnace need?

An annual tune-up before the first cold snap, which most manufacturer warranties and Ontario home insurance policies expect to see documented. Filters should be checked monthly through the heating season and changed on the manufacturer's schedule.

### Still have a question about your furnace?

Tell us the symptom, the furnace age, and your postal code. We will tell you what it likely is and what the CAD range looks like before anyone is dispatched.

Call Now: (416) 555-0100

[tel:+14165550100 →](tel:+14165550100)

 

Send a Message

[/contact/ →](/contact/)

## Related Furnace Services

### Furnace Replacement Toronto

80% AFUE from $3,500 CAD, 95% AFUE from $5,500 CAD. Removal, disposal, and permit included, rebate paperwork filed for you.

View service

[Furnace Replacement Toronto →](/furnace-replacement-toronto/)

### High-Efficiency Furnace Conversion Toronto

95% AFUE conversions with rebate coordination, condensing venting, and 15 to 20 percent gas savings.

View service

[High-Efficiency Furnace Conversion Toronto →](/high-efficiency-furnace-toronto/)

### Thermostat Installation Toronto

Smart and programmable thermostat installation with furnace compatibility and C-wire checks, $199 to $549 CAD.

View service

[Thermostat Installation Toronto →](/thermostat-installation-toronto/)

![](/images/misc/two-furnace-technicians-in-branded-winter-uniforms.webp)

Same-Day Emergency Dispatch, 24/7 Cold Snap Response

## Book Furnace Installation With a TSSA-Licensed Technician

Give us the symptom, the furnace age, and your postal code. You get the fault in writing and the CAD cost before any work on your furnace installation begins.

Call Now: (416) 555-0100

[tel:+14165550100 →](tel:+14165550100)

 

Send a Message

[/contact/ →](/contact/)

-   Diagnostic waived on same-visit repair
-   TSSA G1 and G2 licensed technicians
-   Published CAD pricing, no quote gating