Furnace prices in Mississauga
A standard single-stage gas furnace typically costs $4,150 to $6,750 installed in Mississauga, before 13% HST, about 4% above the Ontario range because of GTA labour costs. In a 1970s to 1990s house, the venting, ducts and AC coil it was built with move the quote more than the brand does.
Peel Region
Mississauga price snapshot
- Winter design temperature
- About -20°C
- Typical homes
- Detached houses and townhouses from the 1970s to 1990s, condos, older lakeshore homes
- Gas utility
- Enbridge Gas
- Electricity
- Alectra Utilities
- Permit
- Depends on the work; the installer usually arranges it
Typical installed prices in Mississauga, before HST
- Single-stage furnace$4,150 to $6,750
- Two-stage furnace$5,700 to $8,300
- Central AC$3,950 to $7,300
- Furnace and AC$8,300 to $15,600
- Ducted heat pump$9,350 to $18,700
Ontario ranges raised about 4% for GTA labour and overhead. Access is easier than in central Toronto, since most detached houses have a driveway and room for an outdoor unit, so the premium is smaller.
On this page
How old is your subdivision?
The snapshot above starts from the provincial ranges in the Ontario Furnace Prices price index and adds about 4% for GTA labour. Most of Mississauga was built in about three decades, and houses from the same years tend to share the same venting, ducts and cooling. Find your decade below: these are the first things an installer checks, and they explain most of the gap between a low quote and a high one.
| Built | Venting | Ducts | AC coil and lines |
|---|---|---|---|
| Before 1970older Port Credit, Streetsville, Cooksville, Malton | Masonry chimney; the water heater left on it often needs a liner | Sized for heat; upstairs cooling often weak | Added later, often the oldest part of the system |
| 1970s and 1980sMeadowvale, Erin Mills, Mississauga Valleys | A mid-efficiency furnace on a metal vent means new plastic venting and a drain | Returns often small for AC | Many second ACs are now 15 to 25 years old |
| 1990slater phases of Erin Mills and Meadowvale | Mid- or high-efficiency from new; check what the water heater vents into | Better sized, more upstairs returns | Often R-22, now scarce: a leak usually means a new coil and condenser |
| 2000s and laterChurchill Meadows and newer areas | Plastic from the start; confirm it meets the current gas code | Usually fine as is | The first AC is near the end of its life; the coil changes with it |
Typical patterns, not rules. Build years vary street by street, so your house’s build year matters more than the neighbourhood name.
A worked example: a 1980s two-storey
Take a 1985 Meadowvale two-storey on its second furnace, a mid-efficiency unit, with a 20-year-old AC, a water heater sharing the old metal vent and a hot upper floor every July:
| Line on the quote | Typical price |
|---|---|
| Furnace and central AC, replaced together | $8,300 to $15,600 |
| Venting fix for the water heater left on the old vent | $300 to $1,500 |
| Larger return air for the upper floor | $500 to $3,000+ |
| Permit | $75 to $300 |
| Total if every line applies | $9,175 to $20,400+ |
Typical ranges before 13% HST, Mississauga adjustment on the equipment line. A house whose last furnace was already high-efficiency usually skips the venting line.
The return air line is the one people skip and regret. Many houses of this era have one or two small returns upstairs, so bedrooms run hot whatever the AC size. A bigger AC does not fix that; moving more air back to the furnace does.
Second furnaces at the end of their life
Many 1970s and 1980s houses are on their second or third furnace, and a second furnace from the 1990s or 2000s is now 20 years old or more. Gas furnaces usually last about 15 to 20 years (see how long furnaces last), so price a replacement in spring or fall, not during a January breakdown. The repair or replace check helps with a borderline repair bill.
Furnace and AC together, or just the furnace?
The AC's indoor coil sits on top of the furnace. If the AC is more than about 10 to 12 years old or runs on R-22, replacing both in one visit avoids paying twice to pull and refit that coil, and gets you matched equipment. If the AC is newer and healthy, a furnace-only swap is reasonable. Our furnace and AC prices guide compares the two routes.
What does your Mississauga house need?
A free in-home estimate checks the vent, the ducts and the AC coil, then prices the furnace alone and both together.
Free, no obligation. About a minute to request.
Townhouses, condos and the lakeshore
Freehold townhouses usually have the furnace in a small utility room and the condenser on a back patio, so everything is carried through the house. Condo townhouse corporations may control where outdoor units and vents go, so get approval in writing first. High-rise suites run on building systems and price differently.
The older houses in Port Credit and Streetsville behave more like Toronto's: masonry chimneys, smaller basements and sometimes radiators. See Toronto furnace prices and boiler prices.
Heat pumps and running costs
Enbridge Gas supplies natural gas in Mississauga and Alectra Utilities delivers electricity. At a design temperature around -20°C, a cold-climate heat pump can carry most of the season, and many owners pair one with a gas furnace as a dual fuel system, typically $11,450 to $20,800 here.
At our default rates of $0.50 per cubic metre of gas and $0.15 per kWh, a 96% furnace makes heat for about 5 cents per kWh, and a heat pump matches that at a seasonal COP of about 3. Dual fuel uses the heat pump in mild weather, the furnace in deep cold. Try your rates in the heating cost calculator and see heat pump prices.
The heat pump half of a dual fuel system can qualify for a Home Renovation Savings rebate if the equipment and home meet the rules and the project is approved before installation; the furnace does not. Programs change, so confirm before you sign.
Sources
- Home Renovation Savings: heat pumps checked October 4, 2026
- Home Renovation Savings: terms and requirements checked October 4, 2026
Permits and contractor checks
Permit needs depend on the work: a straight swap, a fuel conversion and new ductwork are treated differently. The installer usually arranges any permit; look for the permit line on the quote, and check with the City of Mississauga’s building division if unsure. Gas work must be done by a TSSA-registered contractor, so ask for the registration number. If someone knocks offering a furnace or water heater deal, Ontario restricts selling these at your home unless you started the contact (Ontario door-to-door sales rules).
Questions people ask
Do I need a permit to replace a furnace in Mississauga?
It depends on the scope: a like-for-like swap, a conversion from electric or oil, and new ductwork are not treated the same way. Installers normally arrange any permit themselves and show it on the quote. If a quote says no permit is needed, ask why, and confirm with the City of Mississauga’s building division.
Is it cheaper to replace a furnace in a Mississauga townhouse?
A little. A townhouse often needs a smaller furnace and AC, which trims the equipment cost, but tight utility rooms, carrying everything through the house and condo rules on outdoor units and vents add labour. Most freehold townhouses land in the lower half of the Mississauga range; condo townhouses vary more.
What size furnace does a Mississauga house need?
Square footage alone cannot answer it. The rule of thumb of 25 to 45 BTU/h per square foot gives 50,000 to 90,000 BTU/h for a 2,000 sq ft house, a wide spread. A 1970s house with original windows sits higher; one with new windows and attic insulation sits lower. A CSA F280 room-by-room calculation at the local design temperature of about -20°C sets the real size.
Is a heat pump worth it in a 1970s or 1980s Mississauga house?
It can be, after two checks. Ducts sized for heating only may need a bigger return for a heat pump’s higher airflow, and the electrical panel needs room for a 240-volt circuit. Many owners choose dual fuel, keeping a gas furnace for the coldest days. Get a heat loss calculation first, because it decides the heat pump size.