Heating
Furnace installation & repair, done right the first time.
A furnace is the heart of comfort in an Ontario winter — and the worst thing to gamble on. Delson Air installs, replaces, and repairs high-efficiency gas furnaces across the Greater Toronto Area, sized to your home’s actual heat load rather than a rule of thumb.
What we do
Furnace services, end to end.
Every install is performed by a TSSA-licensed gas technician, finished with a full combustion and safety test, and backed by a written warranty. When the furnace quits on a cold night, we offer same-day emergency service.
New furnace installation
Two-stage and modulating high-efficiency gas furnaces (96%+ AFUE), properly sized with a heat-load calculation.
Furnace replacement
Right-sized upgrades for aging or failing units — often rebate-eligible through Enbridge or federal programs.
Furnace repair
Ignitors, flame sensors, blower motors, control boards, gas valves, and pressure switches — diagnosed and fixed.
Emergency no-heat service
Same-day calls when the heat stops, including evenings and weekends through the heating season.
Tune-ups & maintenance
Pre-winter inspections that catch the small failures before they become a freezing-night breakdown.
Why Delson Air
Why homeowners choose us for furnace.
Sized, not guessed
We calculate your home’s real heat load so the furnace isn’t oversized — which causes short-cycling, noise, and uneven heat.
Licensed gas work
TSSA-licensed technicians and Enbridge-authorized installs. In Ontario, gas work is regulated for a reason.
A warranty you can read
Two-year labour warranty on installations, plus the manufacturer’s parts warranty registered for you.
FAQ
Furnace questions, answered.
How long does a furnace last in Ontario?
How much does a new furnace cost in the GTA?
Do you offer same-day furnace repair?
Can I get a rebate on a new furnace?
From the Journal
Helpful reading on furnace.
Furnace Not Turning On? 8 Things to Check Before You Call a Technician
A no-heat furnace in a GTA winter is stressful. Walk through 8 safe checks — thermostat, breaker, filter, gas, and more — before you call Delson Air.
Furnace Making a Strange Noise? What Bangs & Whistles Mean
Your GTA furnace banging, whistling, rattling, or humming? Learn what each furnace noise means, which are urgent, and when to call a Toronto technician.
Heat Pump vs. Furnace in Ontario: Which Saves More in 2026?
Heat pump vs furnace for GTA and Ontario homes in 2026: compare install cost, operating cost, cold-climate performance, rebates, and which one saves you more.
Ready when you are
Stop hoping it'll be quiet.
Start living comfortable.
Same-day estimates for most of the GTA. No high-pressure sales — just a clear quote and a clean install from a team that picks up the phone.