TSSA Compliance for Commercial Boilers: What GTA Property Managers Are Actually Responsible For
In our fall maintenance checklist we mentioned, almost in passing, that you should confirm your boiler's TSSA inspection status and that the required documentation is current. Several people asked the obvious follow-up: what exactly is required, and who is on the hook for it?
Here is the straight answer on TSSA boiler compliance, drawn from the regulations themselves rather than from industry folklore.
TSSA boiler compliance: the short version
If you own or operate a commercial boiler in Ontario, three separate things are true at once:
The boiler almost certainly needs a valid Certificate of Inspection to be legally operated.
Anyone who services it must hold a certificate to work on gas equipment.
The owner, not the contractor, carries the primary legal obligation.
That third point is the one that surprises people. Hiring a licensed contractor is necessary, but it does not transfer the duty off the building.
First: is your boiler even regulated?
Not every boiler falls under the rules. Ontario Regulation 220/01 governs the design, construction, maintenance, use, operation, repair and service of boilers, pressure vessels and piping, but it explicitly does not apply to several categories. The ones that matter in commercial buildings:
A low pressure boiler with a wetted heating surface of 30 square feet (2.79 m²) or less, or a power rating of 30 kW or less
Any boiler with a heating surface of 10 square feet (0.93 m²) or less
A boiler used in a hot liquid heating system with no valves or other obstructions to free circulation between the boiler and an expansion tank that is vented freely to the atmosphere
"Low pressure boiler" has a specific meaning here: one intended to generate steam or vapour at 15 psi (103 kPa) or less, or one intended to operate at 160 psi (1,100 kPa) or less where the water temperature at any boiler outlet is 250°F (121°C) or less.
Read those thresholds carefully before assuming you are exempt. A small unit in a strip plaza may genuinely fall outside the regulation. A bank of heating boilers in a mid-rise almost certainly does not, and multiple small boilers do not average out. Each device stands on its own.
The Certificate of Inspection
For regulated equipment, the rule is blunt. No person shall operate or use, or permit to be operated or used, a boiler or pressure vessel unless a current Certificate of Inspection has been issued stating that it passed an inspection. There is no grace period written into that sentence. An expired certificate means the device should not be running.
Inspection intervals are set out in the code adoption document rather than in the regulation itself. TSSA publishes them as:
High-pressure boilers and deaerators: 1 year
Low-pressure boilers: 2 years
Pressure vessels: 3 years
Quick-opening door vessels and electrochemical cell stacks: 1 year
Certificates run 12, 24 or 36 months to match. Who does the inspecting depends on your insurance: if the equipment is covered by boiler and machinery insurance, your insurer inspects it; if it is not insured, you request an inspection from TSSA. TSSA advises arranging it roughly 60 days before your certificate expires, and applying for the new certificate within 30 days of receiving the inspection record. TSSA also directs owners to post the certificate near each device in a visible location.
What happens when an inspection goes badly
If a periodic inspection turns up a high-risk violation, the expectation is not that you schedule the repair at your convenience. The device comes out of service, and the violation must be resolved before a new certificate is issued.
High-risk findings typically involve the things that stop a boiler from failing catastrophically: inoperable or missing safety relief devices, a defective low-water cutoff, improperly repaired pressure-retaining components. These are exactly the items a proper fall changeover catches in September rather than in January.
One obligation that catches owners off guard: when the device is being inspected, the owner, operator or whoever is in immediate charge of it must point out any defect they know about or believe to exist. Staying quiet about a known problem is itself a contravention.
Who is allowed to touch the equipment
Ontario Regulation 212/01 is unambiguous. No person shall install, alter, purge, activate, repair, service or remove any appliance or equipment used in the handling or use of gas unless they hold a certificate for that purpose. Separately, no person shall handle gas at all without a licence. The certificate classes that matter for commercial work:
G.1: may work on a natural gas or propane appliance of any BTU input
G.2: limited to appliances with an input of 400,000 BTU or less
G.3: works only under supervision, within the scope of the supervising certificate holder
That 400,000 BTU ceiling is the practical dividing line in commercial buildings. A large rooftop unit, a commercial boiler, or a make-up air unit will frequently exceed it, which means a G.2 technician is not certified to service it alone, regardless of how experienced they are. Duct cleaning is the one carve-out: it does not require a certificate, provided that is the only activity performed and the person does not interfere with the appliance.
When you engage a contractor, it is fair, and cheap, to ask which certificate class the assigned technician holds relative to the equipment they are being sent to.
What non-compliance actually costs
Under the Technical Standards and Safety Act, 2000, a person who contravenes the Act or its regulations is liable on conviction to a fine of up to $50,000, imprisonment up to one year, or both, if the person is an individual; or a fine of up to $1,000,000 if the person is a corporation.
There is a further provision worth reading twice if you sit on a board or run a management company. Every director or officer of a corporation has a duty to take all reasonable care to prevent the corporation from committing an offence, and a director or officer who fails in that duty is personally liable to a fine of up to $50,000, imprisonment up to one year, or both. The Act also requires every contractor and employer to take all reasonable precautions to ensure that they, their agents and their employees comply.
One thing you probably do not need
Operating engineer requirements are a common source of anxiety, and for most GTA commercial heating plants they are misplaced. Ontario Regulation 219/01 does not apply to a boiler, or an installation comprising more than one boiler, where the boiler contains hot water at a temperature of less than 212°F (100°C). Typical hot-water heating plants therefore sit outside it. Steam plants are a different conversation, and if you run one, have it assessed properly.
What to do this month
If you manage buildings with boilers and you are not certain where you stand, this is a short list:
Locate the current Certificate of Inspection for every regulated device and check the expiry date
Confirm whether your insurer or TSSA is responsible for the next inspection
Diarise the inspection request 60 days ahead of each expiry
Confirm the certificate is posted near the device
Verify the certificate class of whoever services your gas-fired equipment against its BTU input
For any building you inherited mid-year, treat all of the above as unverified until you have seen the paperwork yourself
None of this is difficult. TSSA boiler compliance is simply the sort of administrative work that quietly slides until an inspector, an insurer or an incident forces the issue, and by then the options are worse and more expensive.
If you would rather this ran on a schedule than on memory, that is precisely what a maintenance agreement is for. Burban has been TSSA-licensed and working on GTA commercial mechanical systems since 1980, and we handle the inspection calendar for buildings across the region.
Questions about a specific building? Call (416) 757-3271 or get in touch.
This article is general information about Ontario's regulatory framework, not legal advice, and requirements can change.
