Heating · Cooling · Hydronic · Indoor Air Quality — Est. XX
Hargrave Heating & Air Conditioning designs, installs, and services furnaces, air conditioners, heat pumps, boilers, and water heaters for homes and businesses across Markham, York Region, Durham, and Toronto. For years, we still answer our own phones.
Most HVAC companies sell you a box. We start with the house. Our technicians have sized, installed, and serviced heating and cooling across York Region and Durham — which means we know which furnaces actually survive an Ontario February, and which ones just look good on a brochure. Repair first, replace when the math says so, and a maintenance plan that keeps small problems small.
High-efficiency gas furnaces, sized by load calculation — not by guesswork. We repair first: if your unit has safe, economical life left, we fix it and say so.
→Central AC and ductless systems built for GTA humidity. Full diagnostics before anyone mentions replacement; most installs done in a day.
→One system for year-round comfort. Cold-climate models rated for Ontario winters, and we walk you through every rebate you qualify for.
→Boiler installs, repairs, and radiant floor retrofits. Quiet, even heat with no blown dust — a different kind of comfortable.
→Endless hot water with a tankless upgrade, or a straightforward high-efficiency tank swap. Sized to your household, not to a sales target.
→Humidifiers, air purifiers, and HRV/ERV ventilation. Because the temperature is only half the story — the air should feel good too.
→Our maintenance plans: proactive seasonal tune-ups, free labour on covered repairs, and transparent pricing that keeps small problems small.
→Rooftop units, make-up air, and service contracts for offices, retail, and restaurants. Scheduled around your hours, not ours.
→A furnace that gets a yearly checkup rarely dies on the coldest night of the year. Iron Shield plans bundle seasonal tune-ups with free labour on covered repairs and pricing agreed up front — so the bill never surprises you.
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No heat at
2 a.m.?
Call us.
Furnace quit on the coldest night of the year, AC died mid-heatwave — our emergency line runs 24/7 across Markham and the GTA. A technician answers, not a voicemail.
Our trucks are based in Markham and run daily across York Region, Durham Region, and Toronto. If you're inside the ring below, you're in our service area.
We repair first. If your furnace or air conditioner still has safe, economical life left, we'll fix it and tell you so. Replacement only enters the conversation when the repair math stops making sense for you — and we'll show you that math.
Same-day service across Markham and much of the GTA for most calls. Our emergency line runs 24/7 for no-heat and no-cool situations — a technician answers, not a voicemail.
All the major ones. We install and service Carrier, Daikin, Lennox, Trane, Goodman, Rheem, York, Amana, Ruud, Napoleon, Bryant, and American Standard — and we'll recommend based on your house, not on a sales quota.
Proactive care with free labour. Iron Shield plans bundle seasonal tune-ups with free labour on covered repairs and transparent, agreed-upfront pricing — designed to keep small problems from becoming 2 a.m. emergencies.
If you're in York Region, Durham, or Toronto, almost certainly. We're based in Markham and run daily routes through Richmond Hill, Vaughan, Scarborough, Pickering, Ajax, Whitby, Oshawa, Newmarket, Aurora, and Stouffville.