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.

Kolostat White Papers

Download our latest white papers to stay up to date on HVAC best practice.

Kolostat Case Studies

Want to know you’re in good hands? Check out the latest Kolostat client case studies.

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Commercial

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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.

ARI/ASHRAE Winter Conference and Trade Show

Kolostat was present at the last ARI/ASHRAE winter conference and trade show with 9 attendees (Antoine Colney, Antoine Tardif, Daniel Robert Jérémie Frappier-Cournoyer, Mark Stevens, Richard Pinard, Sandrine Tremblay, Spiros Athitakis et Stan Katz). Held from January...

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...

Annual Conference of the HRAI

By Daniel Robert On September 18, 2023, the annual conference of the Heating, Refrigeration and Air Conditioning Institute of Canada (HRAI) took place in Montreal. The symposium brought together a large number of stakeholders in the building mechanical industry,...

Kolostat is trusted by

Combustion

Maintenance

Grant Optimization

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