Furnace Replacement in Mississauga, ON: Complete Cost & Installation Guide

In Mississauga, furnace replacement costs typically range from CA$3,500 to CA$8,500 installed, depending on efficiency rating, fuel type, and your home's size. A mid-range gas furnace with good AFUE efficiency (90–94%) usually costs CA$4,500–CA$6,500 all-in. High-efficiency models (95%+ AFUE) command CA$6,000–CA$8,500, while basic units drop to CA$3,500–CA$4,500 but sacrifice long-term savings. Labour accounts for CA$1,200–CA$2,000 of that total; the unit itself makes up the remainder. Factors like ductwork modifications, thermostat upgrades, and removal of the old furnace can add CA$500–CA$1,500 to your quote. Many Mississauga homeowners find mid-range gas furnaces offer the best balance of upfront cost and 15–20 year lifespan.

AFUE (Annual Fuel Utilization Efficiency) measures how much of the fuel your furnace burns actually heats your home. Ontario's building code requires new furnaces to meet minimum 90% AFUE—a standard that has been in place for over a decade. For Mississauga's cold winters, upgrading to 92–95% AFUE can reduce heating costs by 10–15% compared to older 80% systems, translating to CA$200–CA$400 in annual savings. High-efficiency furnaces (95%+ AFUE) are less common but justify their higher upfront cost if you plan to stay in your home beyond 12–15 years. Look for ENERGY STAR certification, which guarantees efficiency and may unlock provincial rebates. When comparing quotes, always confirm AFUE rating—it's the single best predictor of your heating bills.

Gas furnaces dominate Mississauga because natural gas is affordable and widely available through Enbridge. They heat homes quickly and cost less upfront than electric units. However, electric furnaces (resistance or heat pump models) produce zero on-site emissions and may qualify for additional rebates under Ontario's clean energy programs. Heat pump systems are increasingly popular in Mississauga's milder microclimate, offering both heating and cooling at high efficiency (COP 3.0–4.0), though they perform less optimally during extreme cold snaps below –15°C without supplemental heat. If you have an existing gas line and plan to stay in your home, a high-efficiency gas furnace remains the most cost-effective choice. Switching to electric requires venting changes and potentially higher monthly energy costs unless combined with solar or other renewable power.

Ontario requires a building permit for furnace replacement in Mississauga; your contractor should handle the application and scheduling with the City. Permit costs run CA$150–CA$300 and take 1–2 weeks to approve. A municipal inspector must verify proper venting, gas line safety (if applicable), and electrical connections before sign-off. Skipping permits can create liability issues if you sell your home and may void insurance claims. The inspection is non-deductible from your total cost—it's a legal requirement, not optional work. Licensed HVAC contractors in Mississauga are familiar with local inspectors and timelines, so choosing a ProvenQuote verified professional reduces delays and ensures full compliance.

Ontario currently offers limited direct furnace rebates compared to heat pump programs, but several paths to savings exist. The federal Canada Greener Homes Grant provides up to CA$3,200 for heat pump installation on owner-occupied homes, though furnace-only replacements don't qualify. Some municipal utilities, including Enbridge Gas, offer CA$100–CA$300 rebates for ENERGY STAR high-efficiency gas furnace upgrades—check Enbridge's website for current offers. If you're upgrading to a heat pump, you may qualify for additional incentives through Ontario's Clean Energy programs or federal green tax credits (check CRA guidelines). Always ask your ProvenQuote contractor if they can identify rebates for your specific situation; bundling a furnace with other efficiency upgrades (insulation, windows) sometimes unlocks larger incentives.

A standard furnace replacement in Mississauga typically takes 1 day (6–8 hours) once permits are approved and materials are on-site. If your ductwork needs cleaning, sealing, or modification, add 1–2 extra days and CA$300–CA$800. The contractor will remove your old furnace, install the new unit, test all connections, verify venting and safety controls, and run the system through a full cycle before leaving. You should expect some dust and noise during removal; cover furniture and clear the mechanical room. Mild discomfort (lack of heat) is possible during install if done in cold weather, so schedule replacement in shoulder seasons (fall/early spring) if possible. After installation, your new furnace should be serviced annually each autumn—a CA$150–CA$250 maintenance visit that extends equipment life and maintains efficiency.