Furnace Installation & Replacement · Guelph
Furnace Installation & Replacement in Guelph
A new furnace sized for your house, not copied off the old nameplate — installed and vented properly, with the gas side done by a licensed technician.
Most furnace replacements in Guelph are like-for-like swaps done in a day: the old unit out, a new high-efficiency condensing furnace in, new PVC intake and exhaust out a side wall, gas reconnected and tested, thermostat set up. The details that separate a good install from a callback are sizing, venting and what happens to the water heater when it loses its chimney partner.
Sizing
Oversized furnaces short-cycle, wear out early and leave rooms uneven. We run a heat-loss calculation on your actual house — square footage, insulation, windows, orientation — and pick the BTU rating from that. In many Guelph homes the right size is smaller than what was there.
Venting and the orphaned water heater
A condensing furnace vents cool exhaust through PVC, so the old metal chimney is no longer heated by the furnace. If a natural-draft water heater still vents up that chimney alone, it can backdraft or the chimney can deteriorate. Code requires this to be addressed: a chimney liner, or replacing the water heater with a power-vented or tankless unit. We include this in the quote rather than surprising you on install day.
Single-stage, two-stage, modulating
Single-stage is the value option and fine for many homes. Two-stage runs quieter and more evenly at lower cost per hour. Modulating units offer the most comfort and efficiency at the highest price. We'll recommend based on your house and budget, not on what earns the biggest ticket.
Included
- Heat-loss calculation and equipment recommendation (with options)
- Removal and disposal of the old furnace
- New furnace, PVC venting and condensate drain
- Licensed gas connection, pressure test and startup
- Thermostat setup, filter, and a walkthrough
- Manufacturer registration for warranty
Frequently asked questions
How long does a furnace replacement take?
Usually one day. Adding a chimney liner or replacing the water heater at the same time may add a few hours.
Are there rebates in Ontario in 2026?
Programs change frequently. We'll tell you what's active at the time of your quote and handle the paperwork where we can.
Do you install furnaces in Fergus and Elora?
Yes — the whole of Wellington County.
Can you replace the AC at the same time?
We focus on the furnace, water heater and softener. For a combined furnace-and-AC changeout, ask and we'll coordinate with our HVAC partner.
Serving Guelph and surrounding areas. Contact us for a no-obligation quote specific to your project.