Your furnace is the most important appliance in your Ottawa home — responsible for keeping your family safe and comfortable through 6+ months of winter. When it's time for replacement, understanding costs helps you choose the right system for your home and budget. This guide covers 2026 furnace replacement costs in Ottawa.
Furnace costs in Ottawa vary by fuel type and efficiency: Standard efficiency gas furnace (80% AFUE): $2,500–$4,500 installed. Being phased out — most Ottawa homeowners should choose high-efficiency. High-efficiency gas furnace (95-98% AFUE): $4,000–$7,500 installed. The most common choice for Ottawa homes. Uses 15-20% less gas than standard furnaces. Modulating gas furnace (98% AFUE): $5,500–$9,000 installed. Adjusts output in small increments for maximum efficiency and comfort. The premium ...
Several factors affect your total furnace installation cost in Ottawa: Furnace size (BTU output): Ottawa homes typically need 60,000–120,000 BTU furnaces depending on size and insulation. Larger furnaces cost more. Ductwork modifications: If your existing ductwork needs repairs, sealing, or modification for the new furnace, add $500–$3,000. Venting: High-efficiency furnaces use PVC venting instead of a chimney. If switching from standard to high-efficiency, new venting costs $500–$1,500. The...
An oversized furnace wastes energy by cycling on and off frequently. An undersized furnace runs constantly and can't keep up on the coldest days. A proper Manual J heat load calculation ensures your new furnace is sized correctly for your specific Ottawa home. Any reputable HVAC contractor performs ...
Ottawa HVAC dealers carry all major brands: Lennox: Premium brand with industry-leading efficiency. Higher price point, excellent quality. Carrier: Wide range from mid-grade to premium. Strong dealer network in Ottawa. Trane: Known for reliability and durability. Mid-premium pricing. Goodman/Amana: Budget-friendly with solid warranties. Good value for cost-conscious homeowners. Napoleon: Canadian-made, designed for Canadian winters. Competitive pricing with strong local support. Keep Cool:...
Replace your furnace when: it's 15-20+ years old and losing efficiency, repair costs exceed $1,000 or half the cost of a new unit, your home has uneven temperatures or cold spots, your gas bills are increasing despite normal use, the heat exchanger is cracked (safety issue — replace immediately), or the furnace requires increasingly frequent repairs.
Check for current rebates: Canada Greener Homes Grant may cover high-efficiency furnace installations. Enbridge gas offers rebates for high-efficiency equipment. Many Ottawa HVAC companies offer financing with 0% interest for 12-24 months or low-interest plans for 5-10 years. A $6,000 furnace at 0% for 24 months costs $250/month with no interest — much more manageable than a lump sum.
Standard efficiency: $2,500–$4,500. High-efficiency: $4,000–$7,500. Premium modulating: $5,500–$9,000. All prices include installation. Most Ottawa homeowners spend $4,500–$7,000 for a quality high-efficiency gas furnace.
A quality gas furnace lasts 15–25 years with proper maintenance. Annual servicing, regular filter changes, and prompt repairs extend furnace life. Ottawa's long heating season means our furnaces work harder than in milder climates.
A dual-fuel system (heat pump + furnace backup) offers the best of both worlds in Ottawa: efficient electric heating most of the year with gas backup for extreme cold. This reduces your gas usage by 60-80% while maintaining reliable comfort.
Furnace sizing depends on home size, insulation, windows, and layout — not just square footage. A 1,500 sq ft Ottawa home typically needs 60,000-80,000 BTU. A proper Manual J calculation is essential — don't let anyone size your furnace by square footage alone.