Your Trusted HVAC Experts

Kolostat is a fully integrated mechanical contractor with offices in Montreal and Toronto. Kolostat has been providing high-quality HVAC solutions since 1927.

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Turnkey World-Class HVAC Design-Build Solutions

Kolostat specializes in all aspects of the mechanical systems that run buildings. Our multidisciplinary team is skilled in delivering bid & spec and design-build projects, as well as providing service and preventive maintenance for your HVAC systems.

Kolostat Acquires MSB Mechanical to Strengthen Canadian HVAC Market Presence

Montreal, QC – June 17th, 2024 – Kolostat Inc. proudly announces the acquisition of MSB Mechanical Ltd., a leading provider of plumbing, heating and HVAC services in the Greater Toronto Area. This strategic move enhances Kolostat’s market position and service...

ASHRAE Conference – Antoine C.-Tardif shared solutions for decarbonizing hot water systems in multi-residential buildings.

A big thank you to ASHRAE Quebec for hosting the dinner conference on March 12th. Our VP of Engineering, Antoine C.-Tardif, shared solutions for decarbonizing hot water systems in multi-residential buildings. The discussion highlighted the crucial role of...

The arrival of new refrigerants

Find attached an interview given by Daniel Robert, ing concerning the issues surrounding the arrival of new refrigerants which will replace R-134a and R-410a as of January 1, 2025. This is a complex issue; Daniel addresses all the questions surrounding the situation....

What is Decarbonization?

Sustainable Development By Daniel Robert, P.Eng The 2015 Paris Agreement has changed the game in global decarbonization efforts. With its long-term goal to limit planetary warming to 1.5°C compared to pre-industrial levels, stakeholders must adopt more robust and...

Refrigerants: it’s the end of the recreation!

By Daniel Robert, Ing, LEED PA. ASHRAE 2022-2023 Society CTTC (Chapter Technology transfert Committee) Chair, Senior VP, Special Project, Kolostat-Krome Inc Photo Credit: JBC Média par Foulques Delbar Over the past few decades, several significant legislative changes...

Kolostat is trusted by

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Maintenance

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For close to a century, Kolostat has developed a sought after reputation of excellence and professionalism in the commercial HVAC and industrial fields, including ventilation, piping, combustion, and controls disciplines.

With offices in Montreal and Toronto, Kolostat is proud to be a leader in the HVAC industry. Our in-house expertise, effective project management and competitive prices allow Kolostat to offer the best service on the market to its diverse customer base.

  • 104 Office staff Associates
  • Well over 150 site tradesmen and service technicians on the road serving our clients
  • 17 licensed engineers working at Kolostat
  • 27 building mechanical technologists
  • 6 ASHRAE members
  • 7 LEED Accredited Professionals
  • Official partners include: Hydro Quebec and Énergir
  • Certifications include: CEM, CMVP, and RCx