Founded by Clément Marchand over 52 years ago, Clement Marchand Natural Gas Services Ltd. has built an enviable reputation for quality HVAC services across the Ottawa region. Dedicated to heating and cooling solutions, our owner and his team work hard to ensure your complete satisfaction by offering high-quality HVAC products and personalized service to residential and commercial customers in Ottawa.

Since 1971, our family has been committed to your year-round comfort and well-being. We specialize in energy-efficient natural gas heating and cooling systems, all backed by an excellent manufacturer's warranty and installed by our skilled, trained, and licensed HVAC technicians.

After a successful tenure leading the family business, Clément Marchand is passing the torch to his children, Chantal and Patrice. Experienced and fully qualified, they are committed to continuing the tradition of delivering high-quality HVAC products and exceptional service. Our trucks — easily recognized by their distinctive blue and white colors — proudly serve the Ottawa region 24 hours a day, 7 days a week. Our expertise spans residential and commercial HVAC installation, maintenance, and service.