MAINTAIN · 24/7 EMERGENCY
24/7 commercial HVAC repair across Greater Montréal & the GTA
One number, one dispatch, a certified technician on the way. A fleet of 25+ trucks covers heating, ventilation, air conditioning, piping, and controls for commercial, industrial, institutional, food, pharma, and data-center sites — around the clock.
Trusted by
- 24/7
- Emergency dispatchOne number — 514-333-7333, option 1. 24 hours a day, 7 days a week.
- 25+
- Service trucksA fleet covering heating, ventilation, air conditioning, piping, and controls.
- QC + GTA
- Coverage footprintGreater Montréal, Laval, North Shore, South Shore — plus the GTA from the Toronto and Newmarket offices.
Coverage
Greater Montréal, the GTA, and the corridor in between
Four offices — Laval (Kolostat HQ), Montréal, Toronto, and Newmarket — dispatch emergency repair on commercial mechanical systems across Quebec and Ontario.
Greater Montréal
Montréal-Island core, Laval, North Shore (Rive-Nord), and South Shore (Rive-Sud) — dispatched from the Laval head office.
Greater Toronto Area (GTA)
Toronto and the GTA, including Mississauga — covered through the Toronto and Newmarket offices.
Wider Quebec and Ontario
Four offices — Laval, Montréal, Toronto, and Newmarket — covering commercial portfolios across both provinces under one dispatch.
What we repair
Heating, ventilation, air conditioning, piping, and controls
The same trades, the same trucks, the same dispatch number — whether the call is a tenant-occupied office tower, a regulated food plant, or a data-hall CRAC unit.
Heating
Boilers, burners, hydronic and forced-air heating systems — diagnosis, on-site repair, and parts replacement on commercial heating plants.
Ventilation
Rooftop units, air handlers, exhaust and make-up air systems — fan motors, belts, dampers, and controls restored to spec.
Air conditioning
Rooftop AC, chillers, splits, and CRAC units — refrigerant work, compressor, controls, and condenser repair on commercial cooling.
Piping
Hot water, chilled water, steam, and glycol distribution — leaks, valves, pumps, and emergency isolation across commercial mechanical rooms.
Controls
Building management systems, sensors, actuators, and WebCTRL® controllers — diagnosis and emergency repair on the integration layer.
Who calls us
Six sectors, one dispatch number
Kolostat serves commercial and mission-critical facilities, along with industrial, pharmaceutical, food, and institutional sites. Pick your sector to see how the emergency workflow ties back to your portfolio.
Commercial real estate
Office towers, multi-residential, mixed-use, and retail — tenant comfort emergencies, rooftop AC failures, heating-plant lockouts.
Mission-critical & data centers
Data centers, labs, cleanrooms — emergency cooling, pressurization, and humidity restoration where a thermal incident is not an option.
Industrial & manufacturing
Plants, food, pharma, and agri-food — process heating, cooling, and ventilation failures where downtime halts a line.
Other sectors
Hospitals, universities, school boards, and government buildings — emergency response on regulated, occupant-sensitive sites.
How dispatch works
From the call to the follow-up summary
Call dispatch
One number — 514-333-7333, option 1. Available 24 hours a day, 7 days a week.
Tech assigned + ETA
A certified technician is assigned from the 25+ truck service fleet, with the ETA confirmed back to the on-site contact.
Arrive + diagnose
On-site assessment of the failure across heating, ventilation, AC, piping, or controls — with the situation stabilized.
Repair + follow-up
Repair performed on the same call where parts allow, with a summary of the work and recommended preventive follow-up.
Emergency dispatch FAQ
What facility directors ask on the call
How fast can you have a technician on site?
Dispatch is available 24 hours a day, 7 days a week. A certified technician is assigned from a fleet of 25+ service trucks as soon as the call is logged, with the ETA confirmed back to your on-site contact. We do not publish a fixed minute SLA: response time depends on the call queue, equipment type, and where the closest truck is, but the dispatcher will give you a concrete ETA on the call. For contract clients, the dispatcher already has the asset list, site contacts, and access rules on file before the call is logged.
What counts as an HVAC emergency?
Any failure that puts occupants, regulated processes, or critical infrastructure at risk — a heating plant lockout in winter, a chiller down in a tenant-occupied tower, a CRAC failure in a data hall, a ventilation loss on a regulated site (pharma, food, lab). We dispatch on heating, ventilation, air conditioning, piping, and controls across commercial, industrial, pharmaceutical, food, institutional, and data-center sites.
How does billing work for non-contract clients?
We accept emergency calls from non-contract clients as capacity allows. Rates and any minimums are confirmed by dispatch when the call is logged. The fastest path to a predictable rate and predictable response is a preventive maintenance contract — most facility directors who use us on call eventually move to a contract for that reason.
Do you handle after-hours, weekends, and holidays?
Yes. The dispatch line — 514-333-7333, option 1 — is staffed 24 hours a day, 7 days a week, including nights, weekends, and statutory holidays. The same fleet of 25+ service trucks covers heating, ventilation, air conditioning, piping, and controls around the clock.
What is the geographic limit on emergency coverage?
Greater Montréal is our primary footprint — Montréal-Island, Laval, the North Shore (Rive-Nord), and the South Shore (Rive-Sud) — dispatched from the Laval head office. The GTA is covered through the Toronto and Newmarket offices. Sites outside these footprints are best served by a scoped maintenance contract so dispatch logistics are planned, not improvised.
Planned service
Plan maintenance or follow-up work
For an active breakdown, call 24/7 dispatch. Use this form for planned repairs, preventive maintenance, or post-emergency follow-up.
Emergency right now
Call dispatch — 514-333-7333, option 1
Dispatched 24/7. A certified technician is assigned on the call, with the ETA confirmed back to your on-site contact. Planning for next time? Set up a preventive maintenance contract so the dispatcher already has your asset list when something fails.