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Residential and Commercial HVAC

Ottawa's Heating and Air Conditioning Specialists

Trusted Heating, Air Conditioning and HVAC Contractors in Ottawa

HVAC systems are essential to meeting your heating and cooling needs, and scheduling regular inspections and maintenance are vital to keeping your HVAC unit running efficiently. Clement Marchand Natural Gas Services Ltd. is the name to trust if you're looking for reliable HVAC contractors in Ottawa. We are a family-owned and operated business known throughout Ottawa and the surrounding areas for providing high-quality work on residential and commercial HVAC repairs and installation. We also pride ourselves on offering real value in all the products we sell and install.

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About Us

Founded by Clement Marchand 40 years ago, Clement Marchand Natural Gas Services Ltd. has built an enviable reputation for quality over the years with its customers. Committed to air conditioning and heating, our owner and his team work hard to satisfy you by providing high-quality HVAC products and personalized services to residential and commercial customers in Ottawa. 


Since 1971, our family has been dedicated to your well-being and comfort all year round. Our products are natural gas efficient and backed by an excellent warranty. Service is provided by our skilled, trained and licensed staff.


After a successful business career at the head of the family company, Clément Marchand passed the torch to his children, Chantal and Patrice. Experienced and qualified, they will ensure continuity in delivering high-quality products. In addition, our trucks, easily recognizable by their blue and white colours, proudly travel the streets of the Ottawa region 24 hours a day. Our expertise covers residential and commercial installation and service.

Ottawa Heating and Air Conditioning Services

Clement Marchand offers installation, repair and maintenance services in Ottawa for your residential heating and cooling systems, including:


  • Air Conditioning and Furnaces

  • Hot Water Tanks

  • Boilers

At Clement Marchand Natural Gas Services Ltd., we proudly provide quality HVAC services to our customers since 1971. Our experienced and certified technicians can handle all types of HVAC problems and provide effective solutions. As trusted HVAC contractors in Ottawa, we offer personalized services to make your life more comfortable. Count on us to install, repair and maintain your heating and air conditioning unit.

A Range of Efficient Services for Residential and Commercial Customers

At Clement Marchand Natural Gas Services Ltd., we partner with the leading air conditioning and heating industry brands to provide you with durable, high-quality products. In addition, our technicians and contractors undergo advanced training to take care of your Ottawa HVAC, cooling, air conditioning, heating and gas conditioning systems. We service both the residential and commercial sectors to complete your projects. For retail, no matter the size of the project, we offer solutions that fit your needs. 


With 40 years of experience in the field, our company offers maintenance plans and repair services for your heating and air conditioning systems. We work in compliance with the standards, and we proceed to a complete inspection of your systems before carrying out the work. You can set up an annual maintenance and service contract with us. We take care of everything, from pricing to equipment maintenance, including management, installation and repair. We use the most qualified technicians in the industry: passionate people who take pride in their work.


When you call on our company for a job, we assign our best technicians to evaluate and familiarize themselves with your HVAC system, making it easy to detect any discrepancies. On every visit, our commercial HVAC technicians quickly prepare accurate reports and repair problems, ensuring that every customer is satisfied with our service. Contact us today for information on our annual preventive maintenance programs and to take advantage of our services to extend the life of your equipment. We also offer 24-hour emergency service.

Products and/or Services

Products and/or Services

Commercial furnace icon

Commercial furnace

Gas furnace icon

Gas furnace

Industrial furnace icon

Industrial furnace

Natural gas furnace icon

Natural gas furnace

Boiler icon


Furnace icon


Air Conditioning icon

Air Conditioning

Hot water tank icon

Hot water tank

Hydronic boilers icon

Hydronic boilers

Pumps icon


Water heaters icon

Water heaters

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Call Our Experts Today!

Whether your old HVAC unit isn't working correctly or you need to install a new one, call our technicians for help. We also offer an HVAC service and maintenance program to our customers. Contact us today for an estimate or to learn more about our services.

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Efficient and Effective Air Conditioning System

Equipment for a heating system

High-End Water Heater


More Comfort with Our Quality Furnaces!

You Have an Emergency?

Contact Us Now!

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