Mississauga homeowners replace furnaces for two reasons: the old one failed (often on the coldest day of the year), or they are planning ahead and want to avoid that scenario. Either way, the installation process is the same - and choosing the right contractor makes the difference between a smooth same-day experience and a costly, permit-deficient installation that can affect your home insurance.
A technician visits, sizes the furnace with a heat load calculation and quotes 2 to 3 options. No obligation.
Book a Free In-Home QuoteFurnace Installation Cost in Mississauga (2026)
| Furnace Type | AFUE | Installed Price | Best For |
|---|---|---|---|
| Single-stage gas furnace | 95-96% | $2,800 - $4,500 | Budget-friendly, reliable for most Mississauga homes |
| Two-stage gas furnace | 96-97% | $4,500 - $7,000 | Steadier heat and lower gas bills; the most popular choice for detached homes |
| Premium modulating furnace (e.g. Lennox SLP99V, Carrier Infinity 98) | 98%+ | $7,000 - $10,000 | Quietest, most even heat for larger homes |
Prices include equipment, all labour, gas line connection, venting, electrical, permit, and old furnace disposal. Price also depends on the size of your home; see furnace costs by home size. EcoFrost provides itemized written quotes - no surprises on installation day.
The Furnace Installation Process with EcoFrost
Free in-home estimate
A certified EcoFrost technician visits your home, performs a Manual J heat load calculation, inspects your existing ductwork and venting, and provides a written quote for 2 to 3 options at different price points. No pressure, no obligation.
Permit application
EcoFrost applies for the required City of Mississauga mechanical permit. This is included in your quote. Permit turnaround is typically 1 to 3 business days for standard replacements.
Equipment delivery and installation
Our installation team arrives with your new furnace and all required materials. The old furnace is safely disconnected, removed, and responsibly disposed of. The new furnace is installed per manufacturer specs and Ontario Building Code, including proper venting and gas connections.
City inspection and certification
A City of Mississauga inspector verifies the installation. EcoFrost coordinates this appointment. You receive the stamped permit plus our gas safety and commissioning records - important documentation for home insurance and future resale.
Warranty registration and homeowner walkthrough
We register your manufacturer warranty, walk you through the system controls and filter schedule, and answer all questions. You receive a complete installation package including specs, warranty cards, and permit.
Step 1 is free: an in-home estimate with a heat load calculation and a written quote before we leave.
Book a Free In-Home EstimateWhat to Ask Any Furnace Installer in Mississauga
- Are you TSSA licensed and insured for gas work in Ontario? (required by law)
- Do you pull a permit for every installation? (any "no" is a red flag)
- Do you perform a Manual J heat load calculation? (required for proper sizing)
- What is included in the warranty - parts only, or labour too?
- What is your response time if there is a warranty issue in January?
- Can I see references from Mississauga installations in the past 12 months?
Once you have the answers, the next step is a price for your actual home. Our furnace installation Mississauga page carries the current model table and books the free in-home quote, which is where the flat-rate number comes from.
Rebates Available for Furnace Installation in Mississauga
The legacy Enbridge HER+ rebate for high-efficiency furnace installations closed Dec 31 2025; no active 2026 rebate exists for gas furnaces alone. Adding a heat pump changes that: in a hybrid (dual-fuel) system the heat pump qualifies for Ontario's Home Renovation Savings rebate, up to $2,000 in a natural-gas home (which a home with a gas furnace is), plus the smart thermostat rebate. Homes heated by electricity, oil or propane can get up to $7,500, or up to $12,000 for geothermal. EcoFrost checks your eligibility before you book and handles the rebate paperwork. See what each kind of install earns in rebates.
Ready to take the next step?
Get a Free Furnace Installation Quote?Frequently Asked Questions
How long does furnace installation take in Mississauga?
Do I need a permit to install a furnace in Mississauga?
What furnace brands does EcoFrost install in Mississauga?
Is now a good time to replace my furnace in Mississauga?
EcoFrost Heating & Cooling
Toronto's Trusted HVAC Experts Since 2015
Our certified HVAC technicians have completed 15,000+ installs across the Toronto area. We write about heating, cooling, and air quality from real field experience not marketing copy. Learn about us →
