ESA and TSSA: The Two Ontario Authorities Behind a Legal HVAC Install

When a contractor quotes a furnace or heat pump job hundreds of dollars below everyone else, it’s tempting to assume the others are just overcharging. Sometimes the difference is something less visible: whether the install is being done legally.

The question worth asking any HVAC contractor in Ontario is simple: “Is this install going to be properly licensed and inspected?” Two provincial authorities — the TSSA and the ESA — define what “properly” means. Here’s what they require and why it protects you.

The TSSA: the gas side of your install

Most Ontario homes heat with natural gas, which means a gas line connects to your furnace, boiler or water heater. Gas work is regulated by the Technical Standards and Safety Authority (TSSA), and the rules are strict for good reason — improperly installed gas equipment can leak, fail or, in the worst case, cause carbon-monoxide poisoning or fire.

In Ontario, any tradesperson who works on gas-fired equipment must hold a TSSA gas technician certificate. There are two main levels:

• A G2 licence covers gas-fired equipment up to and including 400,000 BTU/h — which includes typical residential furnaces, water heaters and boilers.
• A G1 licence covers any gas-fired equipment, with no BTU limit.

So when someone connects a gas furnace in your home, they are legally required to hold at least a G2 certificate. If they don’t, the work isn’t just lower quality — it’s not legal.

The ESA: the electrical side of your install

Almost every HVAC install also involves electrical work — wiring a new furnace, a heat pump’s outdoor unit, an air conditioner or a water heater. That falls under the Electrical Safety Authority (ESA) and the Ontario Electrical Safety Code.

Two ESA facts matter for homeowners:

1. A wiring notification must be filed by a Licensed Electrical Contractor for work that installs, extends or alters electrical wiring regulated under the Ontario Electrical Safety Code. This notification is what puts your electrical work on ESA’s radar for inspection — it’s not optional paperwork.
2. Installing new equipment such as a heat pump, water heater or air conditioner is required to have an electrical inspection. ESA may deem an inspection unnecessary based on its own assessment of the safety risk, but the default expectation for new equipment is that it gets inspected.

In other words, a properly done HVAC install in Ontario typically generates an ESA wiring notification and an electrical inspection. If a contractor skips that step entirely, your new system has never been independently checked for electrical safety.

Why an unlicensed “deal” can cost you far more

Here’s the part that turns a regulatory issue into a financial one: an unlicensed or uninspected install can void your home insurance. If a furnace fire or water-damage claim traces back to equipment that was installed without the required licensing and inspections, your insurer can deny the claim. Suddenly the few hundred dollars you “saved” is set against a five- or six-figure loss you have to cover yourself.

There’s also the resale angle. Unpermitted, uninspected mechanical work can surface during a home inspection or sale and become a problem you have to fix — properly, and at full cost — later.

What to ask before you hire

You don’t need to memorize the regulations. You just need to ask the right questions:

• “Are your gas technicians TSSA-certified (G1 or G2)?”
• “Will you file the ESA wiring notification and arrange the electrical inspection?”
• “Are you licensed and insured, and can you confirm the warranty?”

A reputable contractor answers all three without hesitation. If a quote dodges these questions, that’s your answer about why it’s cheaper.

Where AeroFusion stands

We’re ESA and TSSA certified, licensed and insured, and we handle the gas certification and electrical inspection requirements as part of every job — so your install is safe, legal and won’t jeopardize your insurance. It’s the same standard behind our free quotes and the work we do on every furnace install across Toronto and the GTA.

When you’re ready, book a free quote and we’ll give you an honest, fully-licensed number — usually within the hour. Cutting corners on a gas-and-electrical install is the one place you never want to save money.