How much does furnace replacement cost in Toronto?

Complete furnace replacement in the GTA typically runs $3,800–$8,500 including equipment and installation. Main variables are efficiency level, brand, and venting changes.

Should I get an 80% or 96% AFUE furnace?

For most GTA homeowners staying 8+ years, the 96% unit pays back the price difference in 4–7 years. If selling in 2–3 years, the 80% makes more sense.

When should I replace my furnace instead of repairing it?

If the furnace is 15+ years old, repair cost exceeds 50% of a new unit, or there's a cracked heat exchanger — replace it. A cracked heat exchanger is a carbon monoxide risk.

How long does furnace replacement take?

Most replacements take 4–6 hours. We aim to have your heat back on the same day we start.

Can I keep my existing ductwork when replacing my furnace?

In most cases yes. We inspect your existing ductwork during the quote visit and note any issues. Most GTA homes have serviceable ductwork that works fine with a new furnace.

Furnace Replacement Toronto & GTA

Q: What size furnace do I need for my Toronto home?

Sizing is done by Manual J load calculation. Most Toronto detached homes (1,500–2,500 sq ft) fall in the 60,000–100,000 BTU range. We size every job properly before recommending equipment.

Furnace Services

What We Do

From full furnace replacement to honest repair assessments — we tell you what your furnace actually needs, not just what generates the most revenue for us.

96% High-Efficiency Furnace

Vents through PVC — no chimney required. Roughly 20% less gas consumed vs an 80% unit. Pays back the price difference in 4–7 years for most GTA homes. Best long-term choice.

80% Standard Efficiency Furnace

Lower upfront cost. Uses conventional metal flue — a direct swap if your existing venting is in place. Good choice when selling soon or when PVC routing is impractical.

Furnace Repair & Diagnostic

We diagnose before recommending. If the repair makes more financial sense than replacing, we'll tell you. If the furnace is past its useful life, we'll tell you that too — honestly.

Warning Signs

Signs It's Time to Replace Your Furnace

A struggling furnace costs you money every month. Know when repair stops making sense.

Furnace is 15+ years old and has had 2+ repairs in the last 3 years
Cracked heat exchanger — a carbon monoxide risk that requires immediate replacement
Gas bills are noticeably higher year-over-year with no change in usage
Uneven heating — some rooms cold, others warm — despite clean filters and open vents
Repair quote exceeds 50% of the cost of a new furnace
Banging, rattling, or popping noises on startup — signs of mechanical failure

Transparent Pricing

Furnace Replacement Costs

Fixed-price written quotes before work begins. Equipment and labour included.

System	Price Range (Installed)
80% AFUE standard efficiency furnace	$3,800 – $5,500
96% AFUE high-efficiency furnace	$4,800 – $8,500
Furnace repair / diagnostic	$150 – $1,200

Prices include Lennox, Carrier, Trane, York, Bryant, and Goodman models. Venting changes quoted separately if needed.

Same-Day Quotes Available

We carry equipment in stock and can often install the same day you decide. Call for a fast written quote.

416-827-8676

TSSA-Licensed · Same-Day Install · All Major Brands

Equipment

Furnace Brands We Install

We work with all major furnace manufacturers and can source the right unit for your home and budget.

Lennox

Industry-leading efficiency. The Lennox SLP99V reaches 99% AFUE — the highest available. Excellent variable-speed blowers for quiet operation. Our top pick for long-term energy savings in the GTA.

Carrier & Bryant

Carrier Infinity series and Bryant Evolution are premium two-stage and modulating furnaces with strong reliability records. Both brands share the same engineering platform. Well-suited to Toronto's cold winters.

Trane, York & Goodman

Trane and York offer strong commercial heritage in residential models. Goodman provides excellent value for budget-conscious homeowners without sacrificing reliability. All carry solid warranties.

FAQ

Furnace Replacement Questions

Complete furnace replacement in the GTA typically runs $3,800–$8,500 including equipment and installation. The main variables are 80% vs 96% AFUE, brand, BTU capacity, and whether venting changes are needed. We provide a same-day written quote for most jobs.

For most GTA homeowners planning to stay 8+ years, yes. The price difference is typically $800–$1,500. With 6+ months of heating season in Ontario, the fuel savings usually cover that gap in 4–7 years. If you're selling in 2–3 years, the 80% unit makes more financial sense.

Key indicators: furnace is 15+ years old, repair cost exceeds 50% of a new unit, you're calling for repairs more than once a year, or there's a cracked heat exchanger. A cracked heat exchanger is a carbon monoxide risk — that means immediate replacement, no exceptions.

Most replacements take 4–6 hours and we aim to have your heat back on the same day. Unusual venting configurations or ductwork modifications may take longer — we'll tell you upfront when we quote the job.

Yes. All gas appliance replacements in Ontario require a gas permit and TSSA inspection. We handle the permit application and arrange for inspection — it's included in your quote. You don't need to call anyone yourself. Never hire a contractor who skips permits on gas work — it voids your insurance and creates liability if something goes wrong.

Sizing is done by Manual J load calculation — not by matching your old furnace. Most Toronto detached homes (1,500–2,500 sq ft) fall in the 60,000–100,000 BTU range. An oversized furnace short-cycles, wears out faster, and leaves rooms uncomfortable. We size every job properly before recommending equipment.

In most cases yes. We inspect your existing ductwork and note any leaks, restrictions, or sizing issues during the quote visit. If your ducts are undersized for a two-stage or variable-speed furnace, we'll tell you and quote any modifications separately. Most GTA homes have serviceable ductwork that works fine with a new furnace.

Yes — our main office is in Thornhill. We serve the entire GTA including Toronto, North York, Scarborough, Richmond Hill, Markham, Vaughan, Mississauga, Brampton, Etobicoke, Ajax, Pickering, Aurora, and Newmarket. Same-day service is available across most of these areas.