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Furnace Installation & Replacement · Dundas, OntarioFurnace Installation & Replacement in Dundas
Furnace installation and replacement in Dundas costs $4,500–$7,500 for a high-efficiency gas furnace, installed, and the work is usually done in one working day. In a valley town full of century homes the furnace is rarely the hard part: the chimney, the vent route out of an old basement and the size of the original ducts decide the quote. We measure the house, price those items in writing and handle the City of Hamilton permit where the job needs one.
What a new furnace involves in a Dundas house, from century brick to newer builds
A new furnace in Dundas is a condensing furnace, because the federal minimum for a residential gas furnace is 95% AFUE and a mid-efficiency unit cannot be swapped for another one like it. That changes the venting. The old furnace sent its exhaust up the brick chimney; the new one vents through two plastic pipes out a side wall and drains acidic condensate to a floor drain or a pump. In a century home with a thick stone foundation and a low basement, finding that vent route and that drain is the first thing we do on the quote visit.
The chimney does not get to retire. In most older Dundas houses the gas water heater shares that flue, and once the furnace leaves, the tank is alone in a chimney sized for two appliances, where its exhaust cools, condenses and can spill back into the basement. CSA B149.1 requires the vent to suit what is left on it. So the quote carries either a liner sized to the water heater or a switch to a power-vent tank, as its own line.
Ducts are the other era problem. Many century homes here had forced air cut in decades after they were built, with small returns and long runs to the second floor, and some still carry the oversized furnace that was installed to push air through them. We run a heat-loss calculation instead of copying the old label, and it often lands smaller; a two-stage furnace with a variable-speed blower then runs longer and quieter and evens out the upstairs. Dundas houses built from the 1970s on are simpler, because the ducts were designed for a furnace and the job is a replacement with new venting.
Some Dundas homes have no ducts at all: they heat with a boiler and radiators, and a furnace is the wrong replacement for those. If that is your house, boiler repair or a new boiler keeps the radiators you already have. For ducted homes, the gas connection is made by a TSSA-licensed technician on the Enbridge Gas line, and the City of Hamilton Building Division permit is pulled where one is required. Our furnace installation page explains install day, the Dundas service area page lists our other work in town, and you can book a free written quote online or by phone.
Why ZK Mechanical for furnace installation & replacement in Dundas
- High-efficiency installs $4,500–$7,500, with the liner, venting and any condensate pump shown as separate lines
- Heat-loss calculation on every house, which matters most in century homes with retrofitted ducts
- Chimney liner or power-vent option priced up front so the water heater is never left orphaned
- Vent routes worked out for stone foundations and low basements before install day
- City of Hamilton Building Division permit pulled and closed where the job requires one
- TSSA-licensed gas connection on your Enbridge Gas line, tested at full fire
- Honest when a furnace is the wrong answer: radiator houses get a boiler conversation instead
Licensed technicians, Dundas dispatch, no overtime charges.
Furnace Installation & Replacement in Dundas — FAQs
What does a new furnace cost in Dundas?
A high-efficiency furnace is $4,500–$7,500 installed. Premium models such as the Lennox SLP98V, Carrier Infinity 98 or Trane S9V2 carry a $500–$1,500 premium, and replacing the furnace and air conditioner together typically runs $7,500–$11,500. In a century home, expect an added line for a chimney liner and, where there is no floor drain near the furnace, a condensate pump at $250–$450. The City of Hamilton lists replacing a furnace as work that needs no building permit; new or replacement ductwork does need one, typically $100–$300, and it is written into the quote. Our pricing page has the full list.
My Dundas house has radiators. Can you install a furnace instead?
We can, but it means building a duct system through a finished century home: bulkheads, floor openings and lost closet space on every level. For most radiator houses the better answer is a new boiler on the existing piping, which keeps the even heat the house was designed around, with ductless units added if you want cooling. We will tell you which way your house leans after seeing the basement and the floor plan.
Where does the vent go on a century home with a stone foundation?
Through the wood rim above the foundation where possible, not through the stone. The termination needs clearances from windows, doors, the gas meter and the lot line that are set by the gas code and the furnace manufacturer, and on a narrow lot that can rule out one side of the house. When no side wall works, the vent goes up through the roof. That is settled on the quote visit, and the route is written into the price.
Is it worth repairing my old furnace instead of replacing it?
Repair when the furnace is under 12 years old and the failed part is small: a flame sensor, an igniter or a pressure switch. Replace when it is past 15 years and the quote is a blower motor, a control board or a heat exchanger at $1,500–$3,000, because that money goes further toward a new unit. Our furnace repair in Dundas page lists what the common repairs cost.
Are there rebates for a new gas furnace in Dundas?
Rebates are provincial, so a Dundas address is treated like any other in Ontario. The current Home Renovation Savings Program is built around heat pumps, insulation and smart thermostats; a smart thermostat included with your install qualifies for $75. If the air conditioner is also due, pairing the new furnace with a heat pump as a hybrid system is where the larger rebates sit. We check what is open on the day we quote and prepare the paperwork.
Other HVAC services in Dundas
Furnace Installation & Replacement in Dundas — fast.
Emergency repair or planned upgrade, quoted in writing before any work starts.