Furnace Replacement Quotes in Mississauga, Ontario

What furnace and AC quotes cost in Mississauga

If your furnace and air conditioner are both original or second-generation, price them as a pair: typically $8,000 to $15,000 installed, before HST. A gas furnace alone typically runs $4,000 to $11,000, and a standard central AC $3,800 to $7,000. Like every range on FurnaceQuotes, these are typical Ontario prices, not quotes.

Mississauga at a glance

Region: Peel Region, between Toronto and Oakville
Gas utility: Enbridge Gas
Electricity: Alectra Utilities
Permits: City of Mississauga. Check whether your job needs a building permit, and who applies.
Housing: Large subdivisions such as Meadowvale, Erin Mills and Malton, condo townhouse complexes, older homes in Port Credit and Streetsville, and high-rise condos.

Rules and fees change. Confirm permit requirements with the city before work starts.

Single-stage gas furnace (95 to 96% AFUE): $4,000 to $6,500
Two-stage gas furnace (96% AFUE, ECM blower): $5,500 to $8,000
Modulating gas furnace (97 to 98% AFUE, variable-speed blower): $7,000 to $11,000
Standard central AC, 1.5 to 3 tons (about 14.3 SEER2): $3,800 to $7,000
High-efficiency or variable-speed central AC: $6,500 to $10,500
New furnace and central AC in one job: $8,000 to $15,000
Whole-home ducted cold-climate heat pump: $9,000 to $18,000
Dual fuel (heat pump paired with a gas furnace): $11,000 to $20,000

Typical Ontario prices in CAD, before 13% HST. Reviewed October 2026. Ranges, not quotes.

Is your Mississauga home due?

Start with when the house was built, then read the labels. The rating plates on the furnace and the outdoor unit show model and serial numbers, and an installer can date both from them.

What Mississauga quotes often involve, by when the home was built. A guide, not a rule: every house differs.
When built	Where you see it	What the quote often involves
Before the 1960s	Port Credit and Streetsville village cores	Older ducts and chimneys, a possible chimney liner for the water heater, and sometimes radiators instead of ducts
1960s to 1990s	Malton, Meadowvale, Erin Mills	An original or second furnace and AC, often both due together, plus duct transitions and a new coil to match the condenser
Late 1990s to 2010s	Churchill Meadows, Lisgar and other newer areas	The first replacement of builder-installed equipment, with the original sizing worth checking
Townhouse complexes	Across the city	Condo corporation rules on where the outdoor unit and vents may go

Furnace and AC together, or one at a time?

If both are past their middle years, replacing them together is usually the better buy. The furnace blower, the indoor coil and the outdoor unit are rated as a matched set, and one visit means one round of duct, electrical and refrigerant work.

Replace both now when

Both units are about the same age and past mid-life
The AC uses R-22 refrigerant, which most units installed before about 2010 do
You want two-stage or variable-speed comfort, which works best as a matched set
The coil on top of the furnace has to come off anyway

Replace one now when

The other unit is under about 10 years old and working well
The installer confirms in writing that the new unit matches the one you keep
Budget is tight this year and you plan the second one within a few seasons

Furnace and AC quotes: prices and what to compare Central air quotes on their own

Townhouse complexes: read the condo rules first

Many Mississauga townhouses belong to a condominium corporation, and the outside of the unit is often a common element. That decides where equipment can go and who approves it.

Ask the property manager

Where the outdoor AC or heat pump may sit, and whether it can move from the old spot
Whether a new vent or line set through an outside wall needs board approval
Noise, screening and colour rules for outdoor units
Who repairs brick, siding or roofing around a new opening
Any insurance certificate, notice period or approved contractor list

Get the answers in writing before the estimate, so the quote prices what the board will actually allow. Freehold townhouses skip the board but still share walls and tight side yards, so vent placement needs the same care.

Many high-rise condos use in-suite fan coils or heat pumps tied to the building's own system. Those follow the corporation's rules, so start with your property manager.

Good signs and warning signs on a Mississauga quote

Most homes here are pricing a furnace, an AC or both. These are the lines that separate a complete quote from a quick one.

Ask before you sign

Sized "same as before"
A 1980s house with new windows and insulation may need less capacity than it has.
No brand or model
You cannot compare two quotes that only say "high-efficiency system".
A discount that expires today
A fair price is still fair next week.
Rental pushed before a purchase price
Ask for both and compare the total cost.

Good signs

Model numbers for the furnace, coil and outdoor unit
With an AHRI reference number that proves the three are a matched set.
A load calculation
Room by room (CSA F280), so the AC and furnace are sized for the house, not copied from the old labels.
A line set plan
Reuse, flush or replace the copper lines, with a pressure test either way.
The extras spelled out
Electrical disconnect, pad, condensate, permits and removal of the old equipment.

Get one written quote for your home to measure against these lists.

Get A Free Quote

When to book in Mississauga

April, May and September are the easiest months for a pair replacement: the furnace is not needed and the AC is not running. The first summer heat wave fills AC calendars, and furnace demand climbs from October through January.

A furnace and AC pair usually takes one long day, sometimes two if ducts or the line set change. If the heat is out in winter, choose Urgent in the form.

Use the same request anywhere in the city, including Port Credit, Streetsville, Meadowvale and Erin Mills. Near the city line? See Oakville to the west, Brampton to the north, or all city pages.

Common questions

Straight answers. If yours is not here, the company can answer it during your free estimate.

Should I replace my furnace and AC at the same time?

If both are original or more than about 15 years old, usually yes. A matched furnace, coil and outdoor unit is rated and warrantied as a set, and you pay for one round of duct, electrical and refrigerant work instead of two. If one unit is under 10 years old, replacing only the other can make sense.

Does my condo corporation have to approve a new AC?

In many Mississauga townhouse complexes, yes, if the work touches the outside of the unit. Moving the outdoor unit, adding a wall opening or changing a vent location usually needs approval. Ask the property manager for the rules in writing before your estimate, and mention them in your request.

Do I need a permit for a furnace or AC in Mississauga?

Check with the City of Mississauga, since it depends on the work. The quote should say who applies for any permit and whether the fee is included. Gas work needs a TSSA-registered contractor, and new electrical work for an outdoor unit is filed with the Electrical Safety Authority.

Is my old air conditioner worth repairing?

If it was installed before about 2010, it most likely uses R-22, a refrigerant no longer used in new equipment and costly to top up. A small electrical fix such as a capacitor, typically $150 to $350, can be worth it. A refrigerant leak or a failed compressor on an R-22 unit usually is not.

Is a heat pump an option in a 1980s Mississauga home?

Often, yes. Most homes of that era have ducts a cold-climate heat pump can use, though some need duct changes or an electrical upgrade. Many owners keep a gas furnace as backup, called dual fuel. Ask for a load calculation so the heat pump is sized for the house, not copied from the old AC.

Keep going

Price your furnace and AC for your Mississauga home

Answer a few quick questions. A participating local HVAC company will confirm the details and book a free in-home estimate for one system or both.