# Boiler Installation Scarborough | Replacement & Combi

URL: https://boilerinstallationtoronto.ca/service-areas/scarborough/

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Toronto Boiler Installation

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# Boiler Installation Scarborough: High-Efficiency, Combi, Replacement and Hydronic Heating Service Across Agincourt and Guildwood

Last updated: September 19, 2026

Boiler installation in Scarborough is post-war housing work. Agincourt, Guildwood, and Birch Cliff homes across the M-series postal codes hold end-of-life gas boilers, and the usual answer is a high-efficiency retrofit or a combi swap that frees the utility room.

**Scarborough Cost Anchor:** Scarborough retrofits run $8,500-$14,500 CAD for older cast iron, $5,500-$9,500 CAD for newer combi swaps. Combi boiler installation runs $4,500 to $8,500 CAD and a 95%+ AFUE condensing unit $6,500 to $12,000 CAD, with combined Enbridge and federal rebates offsetting up to $11,500 CAD.

Call (647) 254-9788

[tel:+16472549788 →](tel:+16472549788)

 

Request Written Installation Quote

[/contact/ →](/contact/)

-   M-series (Scarborough)
-   Same-day GTA dispatch, 4-hour cold-snap response
-   TSSA G1/G2 Licensed Crew

-   Agincourt
-   Guildwood
-   Birch Cliff

-   5-Star Customer Satisfaction
-   Same-Day GTA Emergency Dispatch
-   22 Years of Boiler Installation Experience
-   Written Workmanship Warranty

Common Objections

## What Actually Stops GTA Homeowners From Replacing an Aging Boiler

Four objections come up on almost every call. Here is the straight answer to each, with the CAD numbers attached.

### 1\. “The quote is huge, I am being oversold”

A high-efficiency condensing swap runs $6,500 to $12,000 CAD because it includes a new condensate line, PVC flue rework, near-boiler piping, expansion tank, zone controls, and the TSSA permit. Every line item appears on the quote in CAD. Combined Enbridge and federal rebates offset up to $11,500 CAD.

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

Ontario requires TSSA G1 or G2 certification for gas boiler work, plus CSA B51 for large-BTU pressure vessels. Certificate numbers appear on every invoice and TSSA permit numbers appear on completed work.

### 3\. “Nobody publishes the price”

Our four CAD scope bands are published on this page: diagnostic $99 to $249, standard repair $200 to $1,200, major repair $1,200 to $3,500, and full combi installation $4,500 to $8,500. High-efficiency condensing runs $6,500 to $12,000 CAD.

### 4\. “The boiler is 25 years old, repair or replace?”

Cast iron lasts 30 to 50 years but drops to 60 to 70 percent efficiency by year 25. A modern 95% AFUE unit cuts natural gas bills 25 to 35 percent, qualifies for up to $11,500 CAD in rebates, and pays back in 6 to 10 years. You get a written repair-versus-replace on every diagnostic.

Talk it through with a licensed technician

[tel:+16472549788 →](tel:+16472549788)

Local Housing Stock

## What Boilers in Scarborough Actually Look Like

Post-war housing stock where end-of-life gas boilers are common.

**Typical failure pattern:** End-of-life gas boiler needing replacement or a high-efficiency retrofit.

**Postal codes served:** M-series (Scarborough). Covering Agincourt, Guildwood, Birch Cliff and the surrounding neighbourhoods, under City of Toronto (Scarborough).

Scarborough retrofits run $8,500-$14,500 CAD for older cast iron, $5,500-$9,500 CAD for newer combi swaps.

-   Same-day GTA dispatch, 4-hour cold-snap response
-   22 years serving Scarborough and Toronto
-   TSSA G1/G2 technicians covering Agincourt, Guildwood and Birch Cliff
-   4-hour cold-snap response

![Basement mechanical room with a condensing boiler in a Scarborough home](/images/misc/older-brick-home-basement-mechanical-room-with-cas.webp)

## Our Boiler Services in Scarborough

Boiler installation in Scarborough is post-war housing work. Agincourt, Guildwood, and Birch Cliff homes across the M-series postal codes hold end-of-life gas boilers, and the usual answer is a high-efficiency retrofit or a combi swap that frees the utility room.

 

![Wall-mounted 95%+ AFUE condensing boiler installed in a Toronto basement with copper near-boiler piping and PVC flue](/images/misc/wall-mounted-95-percent-afue-condensing-boiler-new.webp) Most Requested

### High-Efficiency Condensing Boiler Installation Toronto

95%+ AFUE condensing boiler installation with 316L stainless heat exchangers, PVC side-wall venting, and full Enbridge plus Canada Greener Homes rebate coordination across Toronto and the GTA.

$6,500 - $12,000 CAD

[High-Efficiency Condensing Boiler Installation Toronto →](/high-efficiency-boiler-installation-toronto/)

 

![Wall-mounted combi boiler installed in a compact Toronto utility room with isolation valves and domestic hot water piping](/images/misc/compact-wall-mounted-combi-boiler-installed-in-a-s.webp) Space Saver

### Combi Boiler Installation Toronto

Compact wall-mounted combi boilers delivering uninterrupted heating and on-demand domestic hot water, sized by GPM for Toronto homes and fitted with descaling valves for GTA hard water.

$4,500 - $8,500 CAD

[Combi Boiler Installation Toronto →](/combi-boiler-installation-toronto/)

![Old cast iron sectional boiler being removed beside a newly installed condensing unit in a Toronto basement](/images/misc/old-cast-iron-sectional-boiler-being-broken-down-f.webp)

### Boiler Replacement Toronto

End-of-life gas boiler replacement for 15 to 40 year old systems, including cast iron conversions, chimney liner de-commissioning, gas line sizing, and disposal across Toronto and the GTA.

$8,500 - $14,500 CAD

[Boiler Replacement Toronto →](/boiler-replacement-toronto/)

![Cascading commercial condensing boilers in a Toronto mid-rise mechanical room with common venting header](/images/misc/two-cascading-commercial-condensing-boilers-mounte.webp)

### Commercial Boiler Installation Toronto

Rooftop and basement commercial boiler installation for retail plazas, restaurants, offices, and mid-rise condos, built to CSA B51 pressure vessel code and ASHRAE 90.1 efficiency standards.

$8,500 - $18,000 CAD

[Commercial Boiler Installation Toronto →](/commercial-boiler-installation-toronto/)

![Restored cast iron column radiator with a thermostatic radiator valve in a pre-war Toronto living room](/images/misc/restored-cast-iron-column-radiator-with-a-thermost.webp)

### Hydronic Heating and Radiator Installation Toronto

Hydronic distribution design and radiator installation: cast iron column radiators, baseboard convectors, thermostatic radiator valves, and oxygen-barrier PEX manifolds, balanced and air-eliminated.

$3,500 - $12,000 CAD

[Hydronic Heating and Radiator Installation Toronto →](/hydronic-heating-installation-toronto/)

![Oxygen-barrier PEX radiant loops laid across a Toronto basement slab before pour, with the manifold on the wall behind](/images/misc/oxygen-barrier-pex-radiant-loops-stapled-to-insula.webp)

### In-Floor Radiant Heating Toronto

Hydronic in-floor radiant heating retrofits and new-build installs with PEX loop layout, mixing valves, and return-water protection across four zones in Toronto and GTA homes.

$8,000 - $20,000 CAD

[In-Floor Radiant Heating Toronto →](/in-floor-radiant-heating-toronto/)

 

![Technician using a digital flue gas analyser during an annual 12-point boiler tune-up in Toronto](/images/misc/technician-holding-a-digital-flue-gas-analyser-wit.webp) Best Value

### Boiler Maintenance and Annual Service Toronto

Annual 12-point boiler tune-up with digital combustion analysis, expansion tank pre-charge, water pH and glycol testing, and pressure relief valve testing to keep warranties valid.

$199 - $349 CAD

[Boiler Maintenance and Annual Service Toronto →](/boiler-maintenance-toronto/)

![Technician testing an ignition control board inside an opened Toronto boiler casing](/images/misc/technician-with-a-multimeter-testing-an-ignition-c.webp)

### Boiler Repair Toronto

Standard and major boiler repair across ignition, pressure, and heat exchanger faults, with published CAD bands and a written repair-versus-replace analysis on every diagnostic.

$200 - $3,500 CAD

[Boiler Repair Toronto →](/boiler-repair-toronto/)

 

![Technician diagnosing a failed boiler during an emergency no-heat call in a Toronto basement](/images/misc/technician-with-a-work-light-and-tool-case-diagnos.webp) 24/7 Dispatch

### Emergency Boiler Repair Toronto

24/7 emergency boiler repair with same-day GTA dispatch and 4-hour cold-snap response for no-heat, red-tag, ignition-lockout, and frozen condensate failures.

$199 - $349 CAD

[Emergency Boiler Repair Toronto →](/emergency-boiler-repair-toronto/)

Why Choose Us

## Why Scarborough Homeowners Book With Us

-   22 Years of Boiler Installation Experience across Toronto and the GTA
-   Corridor scheduling on Kingston Road and Sheppard Avenue East for tight arrival windows
-   Combi swaps $5,500 to $9,500 CAD, cast iron retrofits $8,500 to $14,500 CAD
-   Red-tag clearance and TSSA violation resolution handled end to end
-   TSSA G1 and G2 licensed, certificate numbers on every invoice
-   Enbridge and Canada Greener Homes rebate paperwork filed for you

The Framework

## How Our Scarborough Boiler Installation Works, 6 Steps

From the first call to the rebate cheque, here is exactly what happens and in what order.

1.  1
    
    ### Site assessment
    
    Postal code, home age, distribution type, existing AFUE, and heating load in BTU per square foot. Same-day or next-morning visit.
    
2.  2
    
    ### Manual J heat load and sizing
    
    Written heat load with boiler capacity sized to the actual home load. No oversizing, which is what causes short cycling.
    
3.  3
    
    ### Written quote, three options
    
    Combi, split system, and high-efficiency retrofit priced in CAD with parts, labour, permits, disposal, and rebate offset per option.
    
4.  4
    
    ### TSSA permit and scheduling
    
    Ontario Building Code Part 6 compliance verified. Installation within 3 to 7 business days standard, 24 to 48 hours on emergencies.
    
5.  5
    
    ### Installation and commissioning
    
    Boiler installed to CSA B51, near-boiler piping to ASHRAE 90.1, condensate neutralised, combustion analysis with a CO monitor, system purged and rebalanced.
    
6.  6
    
    ### Verification and rebate filing
    
    TSSA inspection where required, warranty registration filed, Enbridge and Canada Greener Homes paperwork submitted, written workmanship warranty issued.
    

## Need a boiler quote in Scarborough?

Published CAD pricing, TSSA-licensed technicians, and same-day dispatch across the whole coverage area.

(647) 254-9788

[tel:+16472549788 →](tel:+16472549788)

 

Get CAD Quote

[/contact/ →](/contact/)

## Dispatch Across Agincourt, Guildwood and Birch Cliff

Scarborough dispatch runs on Highway 401 with Kingston Road, Lawrence Avenue East, Sheppard Avenue East, and Markham Road as the local connectors. Agincourt sits north of the 401 around Sheppard and Kennedy, Guildwood south along Kingston Road, and Birch Cliff on the bluffs west of Midland. Same-day dispatch covers the Scarborough M-series postal codes.

Distance is the variable here. Scarborough is large, so we schedule by corridor rather than by appointment slot, grouping calls along Kingston Road or Sheppard Avenue East on the same run. That keeps arrival windows tight instead of giving you a full-day window.

Cold-snap response is four hours. On a no-heat call in post-war housing stock the diagnosis usually resolves quickly, because the failure modes on 25 to 40 year old gas boilers are well known and the parts for the common repairs are on the truck.

## Post-War Scarborough Homes and End-of-Life Gas Boilers

Agincourt, Guildwood, and Birch Cliff were built out through the 1950s and 1960s as post-war family housing. Basements are full height, utility rooms are small, and the heating system has usually been replaced once already. The equipment installed in that second round is now at the end of its service life.

The common pattern is a mid-efficiency gas boiler running around 80 percent AFUE, venting into a masonry chimney, feeding either original radiators or hydronic baseboard added during a renovation. It still works, but it is burning roughly a third more gas than a modern condensing unit would for the same heat, and it has no rebate value.

A lot of Scarborough homeowners choose a combi at replacement because it removes the separate hot water tank and frees floor space in a small utility room. Where the house still runs radiators, the better answer is usually a condensing boiler with return-water temperature protection so the radiators stay and the efficiency gain is real rather than theoretical.

-   End-of-life mid-efficiency gas boiler replacement
-   Combi swaps that remove the separate hot water tank and free utility room space
-   Condensing retrofits that retain original radiator distribution
-   Masonry chimney de-commissioning and PVC side-wall venting
-   Red-tag clearance and TSSA violation resolution

Customer Feedback

## What Scarborough Customers Say

> Agincourt boiler failed inspection. New high-efficiency unit installed to code for $8,700 CAD with paperwork filed.

Ravi M.

Agincourt

5-Star Customer Satisfaction

> Guildwood post-war home, aging boiler swapped for a combi for $6,800 CAD, freeing up the utility room.

Chloe B.

Guildwood

Top-Rated Contractor

> Birch Cliff no-heat call on a Sunday. Emergency dispatch fixed the ignition lockout for $580 CAD.

Malik J.

Birch Cliff

Trusted by Homeowners and Businesses

Get a Quote

## Tell Us What Your Boiler Is Doing

Short form, no gatekeeping. A TSSA-licensed technician follows up with a written CAD quote for Scarborough, and the diagnostic fee comes off the invoice when you authorise the work on the same visit.

-   Four published CAD scope bands, never gated
-   Same-day GTA dispatch, 4-hour cold-snap response
-   Enbridge and Canada Greener Homes paperwork filed for you
-   Written workmanship warranty on labour

### Thanks, we have your message.

A TSSA-licensed technician follows up within one business day.

## Request a Written Installation Quote

Send the details and a TSSA-licensed technician follows up with an itemised CAD quote. No email address required from us, no quote gating from you.

Local Questions

## Boiler Installation Scarborough: Frequently Asked Questions

### How fast can you reach Agincourt or Guildwood?

Same-day dispatch covers the Scarborough M-series postal codes and cold-snap no-heat calls get a technician within four hours. We schedule by corridor along Kingston Road and Sheppard Avenue East so arrival windows stay tight.

### What does boiler installation cost in Scarborough?

Scarborough retrofits run $8,500 to $14,500 CAD where older cast iron distribution is kept and $5,500 to $9,500 CAD for newer combi swaps. A standard 95%+ AFUE condensing installation is $6,500 to $12,000 CAD. Rebates offset up to $11,500 CAD combined.

### My boiler was red-tagged. What now?

A red tag means the appliance has been shut off for a safety reason and cannot be relit until the fault is corrected. We attend, identify the violation, quote the correction in CAD, complete the work to B149, and clear the tag. That is a standard emergency call for us.

### Should I switch to a combi to free up my utility room?

It is a common choice in post-war Scarborough homes with small utility rooms, because a combi removes the separate hot water tank. The trade-off is that hot water and heating share one unit, so the combi has to be sized to simultaneous demand. We calculate that before recommending it.

### Is an 80% AFUE boiler worth keeping?

It works, but it burns roughly a third more gas than a 95%+ AFUE condensing unit for the same heat and it carries no rebate value. At replacement the condensing option costs $6,500 to $12,000 CAD against $3,500 to $5,500 CAD for mid-efficiency, and rebates plus gas savings usually close that gap in 6 to 10 years.

### Do you cover Malvern, Woburn and West Hill?

Yes. The full Scarborough M-series coverage includes Malvern, Woburn, West Hill, Cliffside, Wexford, and Highland Creek.

### What happens to my chimney on a high-efficiency install?

The boiler moves to PVC concentric or side-wall direct venting and the masonry flue is de-commissioned for it. If a gas water heater still shares that chimney, the liner is resized for the remaining appliance, and that work is included in the written quote.

### Do you offer annual maintenance?

Yes. The 12-point annual tune-up is $199 to $349 CAD and covers digital combustion analysis, CO and CO2 ratio check, flame rod and spark electrode inspection, expansion tank pre-charge, water pH and glycol testing, and a 30 PSI pressure relief valve test.

### Still have a question about your boiler?

Talk to a TSSA-licensed technician. Same-day GTA dispatch, 4-hour cold-snap response.

(647) 254-9788

[tel:+16472549788 →](tel:+16472549788)

 

Request Written Installation Quote

[/contact/ →](/contact/)

## Boiler Service Coverage in Scarborough

Get Directions

[https://www.google.com/maps/dir/?api=1&destination=43.7764,-79.2318 →](https://www.google.com/maps/dir/?api=1&destination=43.7764,-79.2318)

## We Also Cover These Areas Near Scarborough

Boiler Installation North YorkNorth York retrofits run $8,500-$14,500 CAD for older cast iron, $5,500-$9,500 CAD for newer combi swaps. View North York page

[/service-areas/north-york/ →](/service-areas/north-york/)

 

Boiler Installation TorontoOlder Toronto cast iron systems run $8,500-$14,500 CAD for a full high-efficiency retrofit. View Toronto page

[/service-areas/toronto/ →](/service-areas/toronto/)

 

Boiler Installation MarkhamMarkham hydronic and combi systems run $5,500-$9,500 CAD for a swap; radiant work scales with zone count. View Markham page

[/service-areas/markham/ →](/service-areas/markham/)

![](/images/misc/tssa-licensed-technician-closing-the-front-panel-o.webp)

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

## Book Boiler Installation in Scarborough

Same-day dispatch with a four hour cold-snap response, and an itemised CAD quote before any work starts.

Call (647) 254-9788

[tel:+16472549788 →](tel:+16472549788)

 

Request Written Installation Quote

[/contact/ →](/contact/)

-   Written workmanship warranty
-   Published CAD pricing, no quote gating
-   TSSA G1/G2 licensed technicians