How much does furnace replacement gas cost in Toronto?

Gas furnace replacement in Toronto typically costs between $3,500-$8,500 installed, with most homeowners paying around $5,000-$6,500 for a mid-efficiency unit in an average home. The wide range depends on furnace efficiency rating, size requirements, and installation complexity.

Basic furnace replacements (80-85% efficiency) start around $3,500-$4,500 for smaller homes with straightforward installations. These entry-level units work well for older homes where you're replacing a similar system and don't need extensive ductwork modifications. However, Toronto's climate and rising energy costs make higher efficiency units a smart long-term investment.

Mid-efficiency furnaces (90-95% AFUE) represent the sweet spot for most Toronto homeowners, ranging from $4,500-$6,500 installed. These condensing units require proper drainage for condensate removal, which may add $200-$500 to installation costs if new drainage isn't already in place. The energy savings typically pay for the upgrade within 3-5 years given Toronto's heating season length.

High-efficiency units (96%+ AFUE) with variable-speed blowers and modulating gas valves cost $6,000-$8,500 but offer superior comfort and lowest operating costs. These premium systems are particularly worthwhile in larger homes or where existing ductwork is already well-designed.

Installation complexity significantly affects pricing. Straightforward replacements where new furnace connects to existing gas line, electrical, and ductwork stay toward the lower end. However, many Toronto homes require additional work: upgrading electrical service for new blower motors ($300-$800), relocating gas lines for different furnace configurations ($400-$1,200), or modifying ductwork for proper airflow ($500-$2,000).

Toronto-specific considerations include TSSA (Technical Standards and Safety Authority) permits and inspections, typically included in contractor pricing but adding 1-2 days to project timeline. The City of Toronto doesn't require building permits for direct furnace replacement, but any gas line modifications need TSSA certification. Always verify your contractor holds proper TSSA gas technician licensing - this isn't optional in Ontario.

Timing matters for pricing and availability. Book furnace replacement during shoulder seasons (late spring or early fall) for better pricing and faster scheduling. Emergency replacements during Toronto's cold snaps often carry 20-30% premium pricing due to high demand and after-hours service calls.

Next steps: Get quotes from at least three TSSA-licensed contractors, ensuring quotes include all permits, disposal of old equipment, and warranty details. Verify the contractor's gas technician certification and ask about financing options - many offer 0% financing during off-peak seasons.