Field notes — seasonal furnace maintenanceMarkham, ON
Heating · Cooling · Hydronic — Est. XX
We are Hargrave Heating & Air Conditioning — a full-service HVAC company based in Markham, Ontario. We design, install, and service furnaces, air conditioners, heat pumps, boilers, water heaters, and indoor air quality systems.
We have worked across Markham, York Region, Durham Region, and Toronto — homes and businesses alike, for years. Our rule hasn't changed: repair first, replace when the math says so, and answer our own phones.
Our line is open around the clock: (555) 010-2030. If your heat quits at 2 a.m., a technician answers — not a voicemail.
“Most companies sell you a box. We start with the house — then pick the equipment.”— How we work
Every home is different, so every quote is written for the house in front of us. Below is a starting point — your free in-home assessment gives you the real number.
Everything below is done by our own certified technicians — no subcontractor roulette, no hand-offs.
High-efficiency gas furnaces sized by load calculation, not 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 finished in a day.
One system for year-round comfort. Cold-climate models rated for Ontario winters, with rebate guidance as part of the quote.
Boiler installs, repairs, and radiant floor retrofits. Quiet, even warmth 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.
Humidifiers, air purifiers, and HRV/ERV ventilation. Temperature is only half the story; the air should feel good too.
Proactive seasonal care with free labour on covered repairs and pricing agreed up front — small problems stay small.
Rooftop units, make-up air, and service contracts for offices, retail, and restaurants — scheduled around your hours, not ours.
Our trucks run daily across York Region, Durham Region, and Toronto. Serving Markham and surrounding areas:
Tell us what's going on. A real person answers.
We show you what's wrong and what it costs, first.
Drop cloths, shoe covers, done right the first time.
We check back; Iron Shield plans keep it running.
Move your cursor — leave a little warmth.
A small studio experimentWe 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 — 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.
All the major ones — Carrier, Daikin, Lennox, Trane, Goodman, Rheem, York, Amana, Ruud, Napoleon, Bryant, and American Standard.
Proactive care with free labour. Seasonal tune-ups plus free labour on covered repairs and transparent, agreed-upfront pricing.
If you're in York Region, Durham, or Toronto, almost certainly. Daily routes through Richmond Hill, Vaughan, Scarborough, Pickering, Ajax, Whitby, Oshawa, Newmarket, Aurora, and Stouffville.