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Residential and Commercial HVAC

Ottawa's Heating and Air Conditioning Specialists

Trusted Heating, Air Conditioning and HVAC Companies in Ottawa

HVAC systems are essential to meeting your heating and cooling needs, and scheduling regular inspections and maintenance is 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 companies in Ottawa. We are a family-owned and operated business known throughout Ottawa and the surrounding areas for providing high-quality residential and commercial HVAC repairs and installation work. We also pride ourselves on offering real value in all the products we sell and install. Read our customer reviews to learn more about our service quality.

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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. Our skilled, trained, and licensed staff provides service.

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.


We regret to inform you that on February 04, 2024, Clément Marchand passed away. Clement is survived by his wife, Pierrette; his children, Chantal, Charles, and Patrice; his grandchildren Valérie, Marie-France, Beverly, Mikaële, Sophie, and François; his great-grandchildren, Alex, Thomas, Léa, and Jackson; and many parents and friends. The funeral will be held on March 23, 2024, at 2:00 pm, at St-François-de-Sales church, 799 Jacques-Cartier Street, Gatineau.

The family will be present at 1:00 pm to receive condolences.

Ottawa Heating and Air Conditioning Services

Clement Marchand Natural Gas Services Ltd. 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 comply with the standards and 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 care for 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 our company for a job, we assign our best technicians to evaluate and familiarize themselves with your HVAC system, making discrepancies easy to detect. Our commercial HVAC technicians quickly prepare accurate reports and repair problems on every visit, ensuring 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

We offer:

Residential Services


  • Air conditioning - Beat the summer heat with our top-quality air conditioning installation solutions. Our HVAC technicians are trained for safe installation.

  • Air conditioning repair—Do you have issues with your air conditioning system? Have it inspected by our team, who will suggest and undertake necessary repairs.

  • Boiler - Get your home boiler installed, repaired, and serviced by us.

  • Furnace installation - We install furnace systems from top brands to keep you warm during winter.

  • Furnace repair - Sudden furnace problems? Do not fret. Our team can offer on-time repairs.

  • Heat pump - Leverage our high-quality solutions to survive the winter chill.

  • Hot water tank - Access superior hot water tank installation and servicing.


Commercial Services


  • Boilers hydronics—Every business needs a reliable boiler. Contact us for installation, repair, or replacement of your boiler.

  • Pumps - Trust us for top-notch pump solutions for businesses.

  • Water heaters - For water heating units for your business establishments and industrial complexes, count on us for efficient water heaters.

Why Choose Us?

Clement Marchand Natural Gas Services Ltd. is Ottawa’s preferred HVAC company due to our longstanding reputation for excellence. Our experienced and certified technicians are equipped to handle various HVAC issues, ensuring personalized and practical solutions. With a commitment to customer comfort and satisfaction, Clement Marchand Natural Gas Services Ltd. stands out for its efficient natural gas products backed by robust warranties and 24/7 availability in the Ottawa region. This dedication to service and quality makes us a trusted choice for HVAC solutions.

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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 our customers an HVAC service and maintenance program. Contact us today for an estimate or to learn more about our services.

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Read some commonly asked questions:


How Often Should I Service My HVAC System?

We recommend servicing your HVAC system once every six months, which is every summer and winter season. Regular maintenance ensures optimal performance and longevity.


What Are the Benefits of a Maintenance Plan?

Our maintenance plans help you avoid unexpected breakdowns, extend the lifespan of your HVAC equipment, and improve energy efficiency. Regular check-ups also ensure your system is running safely and effectively.


Do You Offer Emergency HVAC Services?

Clement Marchand Natural Gas Services Ltd. offers 24-hour emergency services for sudden heating or cooling problems. Call us for immediate support.

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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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