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Furnace Installation & Replacement · Oakville, OntarioFurnace Installation & Replacement in Oakville
Furnace installation and replacement in Oakville runs $4,500–$7,500 for a high-efficiency unit installed, and most jobs are finished the same day. ZK Mechanical sizes the furnace from a heat-loss calculation, handles the Town of Oakville building permit where the job needs one, vents it to code on your Enbridge Gas supply and files any rebate paperwork. We are owner-operated out of east Burlington, so the person who quotes your furnace is the one in your basement on install day.
Furnace Installation & Replacement in Oakville
The furnaces coming out of Oakville basements this year belong to two generations. Glen Abbey filled in from the mid-1970s, River Oaks through the 1980s and West Oak Trails in the 1990s, so the mid-efficiency furnace that came with the house was replaced once around 2005–2010, and that first replacement is now 15 to 20 years old. Joshua Creek and the Preserve got builder-grade single-stage condensing furnaces new, and many of those are being upgraded to two-stage or modulating units for quieter, more even heat rather than because they have failed outright. In those houses the complaint is almost always the bonus room over the garage: a single-stage furnace with a fixed-speed blower either blasts it or ignores it, and a two-stage unit with an ECM blower running long, low cycles is what evens it out.
South of the QEW, the 1950s and 1960s bungalows and side-splits in Kerr Village and around Rebecca Street are the installs that need the most care. Many still vent a mid-efficiency furnace up a masonry chimney shared with the water heater. A condensing furnace vents in PVC through the side wall instead, which leaves the water heater alone in a chimney now far too large for it — so the job usually includes relining that flue down to the tank's size, or moving the tank to a power-vented or tankless unit that leaves the chimney out of it entirely. That line goes in the written quote rather than turning up on install day. The other recurring item is condensate: a high-efficiency furnace produces water, and when the floor drain is across the basement a condensate pump ($250–$450 installed) goes in.
Every Oakville furnace quote starts with a heat-loss calculation, because a lakefront house on Lakeshore Road West and a tight 2010s build in the Preserve need very different outputs for the same floor area. We put the price in writing before you sign, pull the Town of Oakville building permit where one is required and book the inspection, and a TSSA-licensed technician makes the gas connection — checking your Enbridge Gas line size and meter capacity if a range, fireplace or pool heater has been added since the old furnace went in. Read what furnace installation costs in Toronto, Mississauga and Oakville before you compare quotes, then ask for a written quote — free, itemized, and the same number that lands on the invoice.
Why ZK Mechanical for furnace installation & replacement in Oakville
- Heat-loss calculation on every quote — lakefront and north Oakville homes are sized differently
- Chimney liner or venting change for shared chimneys in Kerr Village and older south Oakville bungalows, priced up front
- Town of Oakville building permit and inspection handled by us whenever the job requires one
- High-efficiency installs $4,500–$7,500 with the price in writing before you sign
- TSSA-licensed gas connection, pressure-tested on your Enbridge Gas line
- Lennox, Carrier, Trane, Goodman, Rheem and York installed — the one that fits your ductwork and budget
- Owner-operated from east Burlington, a few minutes from the Oakville line — the estimator is on the install
Licensed technicians, Oakville dispatch, no overtime charges.
Furnace Installation & Replacement in Oakville — FAQs
How much does furnace installation cost in Oakville?
High-efficiency installs run $4,500–$7,500 in Oakville. Across the GTA in 2026 the typical range is $4,300–$7,000, with most replacements clustering around $4,500 to $6,500; premium lines such as Lennox SLP98V or Carrier Infinity 98 add a $500–$1,500 premium over an equivalent base model. Permit costs vary by municipality (typical range $100–$300), and a chimney liner or condensate pump in an older south Oakville home adds to the quote. Replacing the air conditioner at the same time typically runs $7,500–$11,500 and saves $1,000–$2,500 against two separate jobs, because the sheet-metal transitions, the electrical hookup and the permit cycle all happen once.
Do I need a permit to replace a furnace in Oakville?
In most cases, yes — a replacement furnace is permit work through the Town of Oakville's building department, and the inspector looks at the venting, the condensate drain and the gas connection. We pull the permit, schedule the inspection and leave you with the closed permit for your records, which also matters when you sell the house. The gas work itself must be done by a TSSA-licensed technician regardless of the permit; a contractor who suggests skipping either step is telling you something about the rest of the job. Details are in Oakville HVAC permits explained.
Should I replace the furnace and the air conditioner together in Oakville?
Past 12 years on the air conditioner, usually yes. The two machines share the blower and the indoor coil, so pairing them means the plenum is opened once, the gas and electrical hookups happen once and the permit runs once — $7,500–$11,500 for the pair. If your AC is under 8 years old, replace the furnace alone and match the new blower to the existing coil. And if the AC is due anyway, get a quote for a heat pump instead of a new AC: it takes the condenser's place, keeps the new furnace as backup for the coldest nights, and current Ontario programs return up to $7,500 on it where a plain air conditioner earns nothing.
How long does a furnace replacement take in an Oakville home?
A straightforward swap in a Glen Abbey or River Oaks basement takes most of a day: old unit out in the morning, new unit set, vented and wired, gas connected and tested, and the system running by late afternoon. A Kerr Village bungalow that needs a chimney liner for the water heater or new duct transitions for a tight utility closet can stretch into a second morning. We tell you which to expect at the quote — see how long a furnace installation takes.
Can I finance a new furnace in Oakville?
Yes. We arrange it through lending partners, and there is no penalty for clearing the balance early. As a rough guide, a $5,000 high-efficiency furnace financed over 10 years lands near $60–$75 a month depending on the rate. Rebates are applied where the program allows, which shrinks the financed amount. Details and the application are on our financing page.
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Furnace Installation & Replacement in Oakville — fast.
Emergency repair or planned upgrade, quoted in writing before any work starts.