Furnace Installation in Markham
Replacing a furnace in Markham? We install high-efficiency Lennox and other major-brand furnaces with a free in-home estimate and a 10-year labour warranty. Markham blends established homes in Unionville and Thornhill with newer builds in Cornell and Greensborough, so we service everything from aging systems to high-efficiency equipment.
Markham Furnace Installation
Free in-home estimate
A right-sized recommendation based on a proper heat-loss assessment of your home, not a guess.
High-efficiency models
96 to 98 percent AFUE single-stage, two-stage, and modulating furnaces from Lennox and other major brands.
TSSA-certified installation
Licensed gas fitting, venting, and electrical, with full permit and inspection handling.
10-year labour warranty
Our workmanship is backed by a 10-year labour warranty on every furnace installation.
Rebate assistance
Hands-on help claiming eligible Ontario rebates so you keep more of your upgrade savings.
Old unit removal
Safe disconnection and haul-away of your old furnace, with the site left clean.
Getting a Furnace Into a Cornell or Greensborough Home
Cornell and Greensborough were laid out on narrow lots with rear laneways, which changes a furnace installation more than people expect. The mechanical space is frequently tight, sometimes on an upper floor rather than in a basement, and the exterior wall available for venting can be very close to a neighbouring window or a gas meter.
We measure the access route and the venting options at the estimate rather than on install day. That covers whether the unit will physically reach the mechanical room, where a high-efficiency vent can legally terminate given the clearances, and whether the existing gas line has capacity for the appliance you actually want. None of that is difficult, but discovering it late turns a one-day job into two.
Typical Pricing in Markham
| Service | Price Range |
|---|---|
| High-efficiency furnace installed | $2,800 to $8,000 |
| Financing | 0% for the first 6 months, then standard rate |
| In-home estimate | Free |
All prices include labour. Flat-rate quotes provided before work begins. No hidden fees.
Serving All Markham Neighbourhoods
EcoFrost provides same-day HVAC service across Markham. From older homes to new builds, our TSSA-certified technicians know local equipment and climate demands.
Frequently Asked Questions about Furnace Installation in Markham
How much does a new furnace cost in Markham?
A high-efficiency furnace installed in Markham typically runs $2,800 to $8,000 depending on size, efficiency, and staging. We give a fixed quote after a free in-home assessment.
How long does a furnace install take in Markham?
Most standard furnace replacements in Markham are completed in a single day. We handle the permit and TSSA inspection as part of the job.
What warranty comes with a new furnace?
You get the manufacturer parts warranty plus our 10-year labour warranty on the installation itself.
Do you help with rebates?
Yes. We help eligible homeowners claim current Ontario rebates and can walk you through financing at 0% for the first 6 months.
My Markham mechanical room is upstairs, not in a basement. Does that matter?
It affects access, venting and condensate. A high-efficiency furnace produces acidic condensate that needs a gravity drain or a condensate pump, and an upper-floor location often means the latter. Venting has to reach an exterior wall with the required clearances. All of it is workable, it just needs to be planned in the quote rather than improvised.
Will the vent clear my neighbour's window on a narrow Cornell lot?
That is exactly the question to settle before ordering equipment. Sealed-combustion venting has minimum distances from windows, doors, soffits, gas meters and the property line, and on a narrow rear-lane lot the compliant positions can be limited. We identify a legal termination point at the estimate, and if there genuinely is not one we tell you before you commit.
How long will the installation take in a Cornell home?
A straight furnace replacement is normally one day. Add half a day if the venting has to be re-routed to reach a compliant termination point, which happens on the narrower lots. We give you the realistic figure at the estimate, including whether the mechanical room location means carrying equipment up a flight of stairs.
Do you service all Markham neighbourhoods?
Yes. We cover Unionville, Cornell, Berczy Village, Markham Village, Milliken Mills, Thornhill, Cathedraltown, and every Markham community with same-day and emergency service.
Ready to Book? We Serve Markham 24/7
TSSA-certified. $0 overtime fees. Same-day service available across Markham and surrounding areas.
More HVAC help in Markham
Related EcoFrost pages for Markham homeowners.