Commercial Heating & Air Conditioning in Montréal

The island of Montréal concentrates most of the territory’s commercial, industrial and institutional building stock: downtown office towers, shopping centres, the East-End and Saint-Laurent industrial parks, schools, hospitals and municipal buildings. Montréal Combustion works B2B on both sides of thermal comfort — heating and natural gas combustion and boilers on one side, commercial air conditioning and rooftop units on the other — with the same foundation: structured diagnosis, documented return to service.

How do you keep dense city-centre buildings cool?

In a downtown office tower or retail space, air conditioning is not an accessory comfort: exposed floors, server rooms and high-occupancy spaces depend on rooftop units, chillers and heat pumps running at full load all summer. Since rooftop and mechanical-room access is more constrained than in the suburbs, planned preventive maintenance — coils, refrigerant charge, controls — prevents breakdowns during heat waves, precisely when every contractor’s lead times stretch.

What are the heating challenges of Montréal’s building stock?

The central boroughs are older than the surrounding suburbs: original boiler plants, hot-water or steam boilers at end of life, outdated controls. The typical symptoms — repeated burner lockouts, declining efficiency, imbalances between zones — should be diagnosed before winter, not during it. For institutional networks (schools, healthcare), service continuity requires work coordinated with building occupancy.

Which parts of the island do we serve?

Downtown and central boroughs: offices, retail, hotels, heritage buildings.
Industrial East End (Anjou, Saint-Léonard, Montréal-Est): manufacturing, food processing, logistics.
Saint-Laurent and the West Island: business parks, technology, distribution.
Institutional networks: schools, healthcare, municipal — including multi-site programs.

The Grand Montréal page covers metro-scale multi-site coordination; for planned or emergency work on the island: 450-473-0909.

Frequently Asked Questions

Do you work downtown despite access and parking constraints?

Yes. City-centre work is prepared with the property manager: access to mechanical rooms and rooftops, time windows, coordination with building security. Logistics is part of the planning, not improvisation.

Do you handle boiler plants in older or heritage buildings?

Yes. Older boilers and networks call for a careful diagnosis before any modification: heat-exchanger condition, controls, draft and gas-code compliance. We document the existing installation before recommending a repair or an upgrade.

What should we do if a server-room air conditioner fails during a heat wave?

Treat it as an emergency: a technical room heats up fast. Call 450-473-0909; meanwhile, shed non-essential loads and keep the airflow unobstructed. The diagnosis will cover the unit, the refrigerant charge and the controls.