About DEI Consulting Engineers

With three offices across Ontario, located in Waterloo, Hamilton, and Barrie, our firm provides professional mechanical, electrical, refrigeration, and aquatic consulting engineering for architects and building owners.

DEI Consulting Engineers Inc. is a leading professional consulting engineering firm specializing in mechanical, electrical, refrigeration, aquatic, and sustainability engineering. Since our establishment in 1999, we have proudly served the building services industry with a legacy of innovation and excellence. Our commitment to the integration of sustainable design practices combined with our unmatched customer service allows us to deliver high-performance engineering solutions tailored to the unique needs of each client.

Our vision is to lead the building services industry through innovative, sustainable, and client-centered engineering solutions. We aim to redefine building design and performance, ensuring that every facility we engineer enhances the lives of its occupants while minimizing its environmental footprint.  We believe that the best systems are functional, energy-efficient, and cost-effective. Our philosophy centers on delivering engineering solutions that meet building and occupancy requirements while balancing sustainability, budgetary restraints, and operational efficiency.

Operating from our offices in Waterloo, Hamilton, and Barrie, DEI Consulting Engineers employs over 80 diverse and talented staff members. Our multidisciplinary team is dedicated to design integrity, meticulous attention to detail, and proactive management of the complex engineering challenges that arise across a wide range of projects.  Our core areas of expertise include:

• Mechanical Engineering: HVAC system selection & design, optimization, and energy recovery solutions; plumbing and water systems with a focus on efficiency and sustainability; building automation systems design including control strategies and sequences; fire protection system designs.
• Electrical Engineering: Purpose-designed power distribution systems including electrical site servicing; life safety systems; generator and emergency power systems; lighting and lighting controls tailored for each building and application.
• Aquatic Engineering: Comprehensive design packages for recreational facilities; audits; compliance consulting with current and future health and code regulatory requirements.
• Refrigeration Engineering: Standalone design services for commercial / retail refrigeration systems, industrial refrigeration, and recreational / arena refrigeration plants.
• Sustainability Engineering: Energy modeling, decarbonization studies, and support for sustainable certifications such as Zero-Carbon and LEED.

At DEI Consulting Engineers, we are committed to shaping the future of the building services industry through our innovative and sustainable engineering solutions. Our focus on quality, collaboration, and client satisfaction drives us to exceed expectations in every project we undertake. As we continue to evolve and adapt to the changing landscape of the industry, we remain dedicated to our mission of enhancing building performance while minimizing environmental impact, contributing to a better future for our clients and communities.