Can a plumber also do HVAC work in Ontario?

In Ontario, plumbers and HVAC technicians require different licenses and certifications, so a plumber cannot automatically do HVAC work unless they hold additional qualifications.

The key distinction comes down to the type of work and regulatory oversight. Plumbing work in Ontario falls under the Ontario Building Code and requires appropriate plumbing licenses, while HVAC work - particularly anything involving gas lines, refrigerants, or complex heating systems - falls under TSSA (Technical Standards and Safety Authority) jurisdiction.

What Plumbers CAN Do

Licensed plumbers in Ontario can handle the water-related aspects of HVAC systems, such as connecting water lines to boilers, installing hydronic heating pipes, or working on the plumbing connections for radiant floor heating systems. They can also install basic hot water tanks, though gas connections require additional certification.

What Requires HVAC Certification

For furnace installation, ductwork, gas line connections, air conditioning systems, or heat pump installations, you need a contractor with TSSA certification. Gas work specifically requires a G1 or G2 gas technician certificate. Refrigeration work requires additional TSSA certification for handling refrigerants.

Dual-Licensed Contractors in Ottawa

Some contractors do hold both plumbing and HVAC certifications. You can verify their qualifications by checking:

• TSSA contractor search at tssa.org for gas and HVAC certifications


• Their business license with the City of Ottawa


• WSIB clearance certificate at wsib.ca

When hiring for complex projects like basement renovations or whole-home heating system replacements in Ottawa neighborhoods like Kanata or Barrhaven, always verify that your contractor holds the appropriate certifications for each type of work they'll be performing.

Red Flags to Watch For

Be cautious of any contractor who claims they can "handle everything" without showing proper certifications. In Ottawa's competitive market, legitimate contractors will readily provide their TSSA numbers, licensing information, and insurance documentation. If someone offers to do both plumbing and HVAC work, ask to see their certifications for both - it's your protection under Ontario law.

For major HVAC installations in Ottawa, permits are typically required through the City of Ottawa Building Code Services (613-580-2424), and the work must be inspected by TSSA before activation.