MacKay Heating & Cooling
MacKay Heating & Cooling repairs and installs furnaces, boilers, heat pumps and air conditioning in Saint Catharines and across the Niagara area. Emergency service is open around the clock, every day.
What they do
MacKay Heating & Cooling works on furnaces, boilers, heat pumps, air conditioning and water heaters, covering both repairs and installations. The business has operated since 1967 and serves Saint Catharines, Niagara Falls, Welland and Grimsby, along with the wider Niagara region. Its work includes furnace repair and replacement, air conditioning repair and installation, and heat pump and ductless mini-split service. Emergency service is offered and the business is open around the clock, every day. Free estimates are available, and financing is available for new systems.
- Furnace repairs and installs
- Boiler service
- Heat pumps
- Ductless mini-splits
- Air conditioning
- Heating repairs
Listed under Heating and cooling emergencies
Where they work
What we checked
Checked 12 Nov 2026, from public sources.
Not yet verified. We haven’t contacted this business yet. Ask for a written quote before work starts.
Other heating and cooling emergencies pros in St. Catharines–Niagara
Still choosing the equipment?
Compare prices and specs before you call a pro.