Furnace Replacement Quotes in Oakville, ON

What furnace and AC quotes cost in Oakville

Oakville quotes often include premium tiers or a second system, so compare scope before price. The equipment tier moves a quote more than any other line, as the FurnaceQuotes.ca home page notes. A modulating furnace typically runs $7,000 to $11,000 and a high-efficiency or variable-speed central AC $6,500 to $10,500, installed, before HST. A house with two systems pays for two.

Oakville at a glance

Region: Halton Region
Gas utility: Enbridge Gas
Electricity: Oakville Hydro
Permits: Town of Oakville. Check whether your job needs a building permit, and who applies.
Heritage: Designated homes, including those in heritage conservation districts such as Old Oakville, may need a heritage permit for exterior changes.
Housing: Older lakeside homes in Old Oakville and Bronte, large 1980s to 2000s homes in areas like Glen Abbey, and newer homes north of Dundas Street.

Rules and fees change. Confirm them with the Town of Oakville before work starts.

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
Ground-source (geothermal) heat pump: $25,000 to $45,000

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

Two systems or zoning: getting the upper floor right

Large two-storey homes often struggle to keep bedrooms comfortable from a basement furnace. The standard fixes are a second system upstairs or zoning on one system, and the quote should say which you are buying.

Basement furnace and coil
Heats and cools the basement and main floor through the usual trunk and floor registers.
Second system for the upper floor
Often an air handler or small furnace in the attic, with ceiling registers. In an unheated attic it needs insulated ducts and a condensate drain with overflow protection.
A thermostat per system
Each floor runs on its own, so bedrooms can stay cool while the main floor is in use.
Two outdoor units
Each one matched to its own indoor coil. Ask for a separate AHRI reference number for each pair.

Zone one system

Motorized dampers and a thermostat per zone
Costs less than a second system
Works best with a two-stage or modulating furnace and a variable-speed blower
Needs ducts that can carry enough air to the top floor

Add or replace a second system

Separate equipment for the upper floor, often in the attic
One floor keeps working if the other system fails
Two sets of equipment to buy and service
Attic units need insulated ducts, a safe drain and service access

When premium equipment pays off

Premium tiers buy comfort and quiet more than big savings. They make the most sense in large or zoned homes, where long, low-speed run times even out the floors.

Typical installed prices in Ontario, CAD, before 13% HST. Reviewed October 2026. Ranges, not quotes.
Option	Typical range	Worth it when
Two-stage furnace	$5,500 to $8,000	Most family homes. The baseline to compare against
Modulating furnace	$7,000 to $11,000	Large or zoned homes and rooms that swing in temperature
Standard central AC	$3,800 to $7,000	Smaller cooling loads and simpler single-zone homes
Variable-speed central AC	$6,500 to $10,500	Humid summers, hot upper floors and owners who value quiet
Dual fuel	$11,000 to $20,000	A heat pump for most of the year with gas backup for cold snaps

Ask for the AHRI reference number of each matched furnace, coil and outdoor unit, so the rated efficiency is what you get. Have a premium quote already? Try the quote checker.

Humidity near the lake

Summer air near Lake Ontario can feel damp even when the thermostat says cool. The fix is often how the AC runs, not a bigger AC.

Right-size the AC
An oversized AC cools fast and shuts off before it removes much moisture. A room-by-room load calculation guards against that.
Variable speed
Long, low-speed cycles pull more water out of the air. That is a large part of what the premium AC tier buys.
Whole-home dehumidifier
For basements and lakeside homes that stay damp, a ducted dehumidifier can be added. Ask for it as a separate line with its own drain.
Winter humidifier
Heated winter air gets dry. A furnace humidifier needs a water line and a drain. Price it separately so you can decide.

Heritage homes in Old Oakville

Swapping a furnace in the basement is a building and gas question. The heritage question starts outside.

A new vent through a street-facing wall, an outdoor unit beside the porch or a new roof penetration changes how the house looks. If your home is designated, including homes in a heritage conservation district, ask the town's heritage planning staff whether that part of the job needs a heritage permit before you book an install date.

In older homes the water heater often shares the chimney with the furnace. Once a high-efficiency furnace vents through the wall, the water heater may need a liner or new venting, typically $300 to $1,500.

What an Oakville quote should include

Every piece of equipment by model number, for each system
An AHRI reference for each matched furnace, coil and outdoor unit
A load calculation per system or zone
Zoning parts, thermostats and which floor each one controls
Humidity add-ons as separate lines
Attic work: duct insulation, condensate drain and overflow protection
Permits, any heritage approval, removal, warranties and the install date

When to book in Oakville

Spring and early fall are the best windows for a two-system or zoning project, which can take more than a day. Demand climbs from October through January and again with the first summer heat.

Comparing premium options? Get one written quote for your home to measure against.

Get A Free Quote

The same request works across town, from Bronte and Glen Abbey to the newer streets north of Dundas, and nearby in Burlington and Milton. See also Mississauga to the east, Hamilton to the west, or all city pages.

Common questions

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

Is a modulating furnace worth it in a large Oakville home?

It can be, mostly for comfort. A modulating furnace typically runs $7,000 to $11,000 against $5,500 to $8,000 for two-stage. The gas savings between them are small; the gain is steadier temperatures and quieter running, which matter most in big, zoned or open-plan homes. Ask for both tiers on the same quote.

Should a big two-storey house have two systems?

Not always. If the ducts can carry enough air upstairs, zoning one well-sized system is often enough. Two systems make sense when the upper floor is large, the ducts are undersized or the house already has a second unit in the attic. A load calculation for each floor settles it.

Do I need heritage approval to replace a furnace in Old Oakville?

Work inside the house is usually not a heritage question. Exterior changes can be: a new vent on a street-facing wall, an outdoor unit in view of the street or a new roof penetration. If your home is designated, ask the Town of Oakville's heritage planning staff before you book the install.

How do I control humidity in a lakeside home?

Start with the AC: make sure it is not oversized, and consider variable speed, which runs longer at low speed and removes more moisture. If rooms or the basement stay damp, a whole-home dehumidifier is the next step. In winter, a furnace humidifier does the opposite job.

Keep going

Get a written quote for your Oakville home

Answer a few quick questions. A participating local HVAC company will confirm the details, including any second system, and book a free in-home estimate.