About Us

A family-owned company dedicated to your comfort

solutions with personalized service and recognized technical expertise.

Réfrigération Delta T is a family-owned business based in the National Capital Region, founded by Dominic Thériault.

Our mission: to provide high-quality HVAC/R solutions with personalized service and recognized technical expertise.

Our Story

Influenced from an early age by his father, a building automation specialist, Dominic quickly developed an interest in building engineering.

At just 18, he began his career as a refrigeration technician and Class 1 natural gas heating technician.

The Foundation

Driven by an entrepreneurial spirit and recognizing the lack of specialized services in refrigeration, air conditioning, heating, and ventilation in the Outaouais region, Dominic founded Réfrigération Delta T—an enterprise dedicated to technical excellence and client service.

The Partnership

Soon after, he was joined by Gino Thériault, a professional technologist in electrical engineering and instrumentation, and a board member of the Ottawa chapter of ASHRAE.

With over 40 years of experience, Gino became a key partner and subcontractor, bringing invaluable expertise to the team.

Today

Together, Dominic and Gino combine over 50 years of experience, delivering unique know-how and high-quality services in the field of climate engineering.

Our Values

At Réfrigération Delta T, our values guide everything we do—our decisions, our work, and our relationships with every client.

Quality of Service

We aim for excellence in every project. Our priority: reliable, precise, and lasting results.

Transparency and Honesty

Clients are informed clearly at every step. Costs, timelines, and solutions are always communicated with clarity.

Commitment

We fully invest in every project, large or small. Client satisfaction is our driving force.

Passion

We love our craft. This passion shows in the precision of our work and our constant drive to improve.

Environmental Responsibility

We are committed to environmentally responsible practices and recommendations.

Dominic Thériault – Founder

Certified refrigeration technician
Class 1 natural gas heating technician
Expertise in refrigeration, air conditioning, and heating
Passionate about innovation and energy efficiency

Gino Thériault – Partner and Controls Expert

Professional technologist in electrical engineering and instrumentation
Board member, ASHRAE Ottawa Chapter
40+ years of experience in building automation
Specialist in DDC controls and smart systems

Our Unique Advantage

Mechanicals + Controls Under One Roof

Unlike many competitors, we master both mechanical HVAC/R systems and building automation. This combined expertise allows us to deliver optimal integrated solutions and seamless project coordination.

Personalized Service

As a family-owned business, we value long-term relationships with our clients. Every project receives personalized attention and solutions tailored to real needs.

Quality Commitment

Our reputation is built on quality workmanship and client satisfaction. We take full responsibility for our work and guarantee our interventions.

Our Mission

To provide clients in the National Capital Region with HVAC/R products and services truly adapted to their needs, while equipping them with the knowledge to make the best decisions possible.

Our priority: helping clients save money in the short, medium, and long term by optimizing their systems, being proactive with maintenance, and offering tailored solutions.

Trusted by Our Clients

Delta T in Gatineau delivers HVAC/R solutions designed to meet each client’s real needs. Their personalized approach ensures comfort, performance, and energy efficiency.

Many clients have already trusted them for sustainable, reliable projects, strengthening their local reputation in the Outaouais region.