Carbon Monoxide Detectors in Quebec Condominiums

Carbon monoxide (CO) is an odourless and potentially deadly gas. In a divided co-ownership, the presence of an indoor garage, boiler room, fireplace or any combustion appliance increases the risk. For the board of directors and the syndicate, understanding the requirements relating to CO detectors is essential to protect co-owners, limit incidents and remain compliant with Quebec requirements.

This article summarizes the applicable rules, best practices for installation and maintenance, and the operational measures to put in place in your condo in Montreal and the greater metropolitan area.

Legal framework and the syndicate’s responsibilities

In Quebec, building safety requirements arise primarily from the Building Act, the Quebec Construction Code (Chapter I – Building) and the Quebec Safety Code (Chapter VIII – Building). In practice, this translates into two complementary aspects for your divided co-ownership:

• Design and installation compliant with the Construction Code for new buildings and major work.
• Maintenance, inspections and upkeep of safety devices, including CO detectors, in accordance with the Safety Code.

According to the Regie du batiment du Quebec (RBQ), a carbon monoxide detector is generally required in dwellings when the building has a combustion appliance, a boiler room or an adjoining or communicating indoor garage. The board of directors must verify the building’s configuration and ensure that each unit and the exposed common portions are protected by appropriate, functioning detectors.

Useful references:

• Quebec Construction Code (B-1.1, r.2) – principles governing the installation and performance of safety equipment. LégisQuébec
• Quebec Safety Code (B-1.1, r.3) – requirements for maintaining and keeping safety devices in service. LégisQuébec
• Practical information about CO and detectors – RBQ

In addition to these rules, your by-laws of the immovable and the declaration of co-ownership may specify co-owners’ obligations, such as monthly testing in private portions. The syndicate nevertheless retains overall responsibility for the safety of the common portions and the building’s compliance.

Where to install detectors in a divided co-ownership

Installation strategy should be planned by “risk zones” and by status (private portions versus common portions). Always follow the manufacturer’s instructions and applicable standards.

In private portions (units)

• Install a CO detector near bedrooms, ideally in the corridor leading to the sleeping areas.
• Provide one detector on each storey of a multi-level unit exposed to the risk.
• Avoid bathrooms and locations too close to a combustion appliance, which can cause false alarms, or to a ventilation outlet.
• Choose an installation height that complies with the manufacturer’s recommendations, whether on the ceiling or on a wall at the specified distance.

When the building has an underground garage, mechanical rooms or combustion equipment, assume that a detector is required in potentially exposed units, depending on the configuration, ducts, shafts and connections. The board of directors can have the plan reviewed by a professional, such as a building mechanical engineer, when the situation is complex.

In common portions

• Indoor parking areas: CO detection systems connected to mechanical ventilation and appropriate alarm devices.
• Boiler rooms and mechanical rooms: local detectors, signage and alarm procedures.
• Common portions connected to garages or ducts: additional protection as needed, following a risk assessment.

In indoor parking areas, the Code sets out requirements for detection and ventilation, including activation thresholds and ventilation controls. For technical details, refer to RBQ documents and the design professional.

Resources:

• CO hazards and prevention – RBQ
• Condo management best practices – RGCQ

Maintenance, testing and records: the board’s role

A CO detector protects people only if it works. The board of directors must organize maintenance and record-keeping.

• Monthly testing: recommend that co-owners press the “test” button once a month. Provide an annual reminder.
• Periodic replacement: many detectors have a service life of 7 to 10 years; consult the instructions. Replace batteries as needed or choose units with long-life sealed batteries.
• Annual inspection: schedule an inspection of detectors in the common portions and record the results, including the date, location, condition and corrective action.
• Records and evidence: keep a centralized register and attach a summary to the annual general meeting minutes to demonstrate the syndicate’s diligence.
• Qualified contractors: for common systems, including the garage, controls and panels, retain contractors holding the appropriate licences. Refer to RBQ requirements for contractor qualifications and work compliance. RBQ – Licences and qualifications

Include these tasks in the building’s maintenance logbook (EUC), with clear frequencies and assigned responsibilities for the condominium manager, caretaker or specialized firm. Structured follow-up makes it easier to budget for common expenses and reduces incidents.

For operational support, see our operations management and preventive maintenance services: multiRent – Services, operations management.

Procedures in the event of a CO alarm or symptoms

Every second counts during a CO alarm. Develop a simple procedure and communicate it to all occupants.

1. If the alarm sounds and symptoms such as headaches, nausea or dizziness appear, immediately go outside into fresh air and call 911.
2. If the alarm sounds without symptoms, ventilate the premises, avoid using combustion appliances and contact a qualified professional to diagnose the source.
3. For an alarm in an indoor parking area, follow the protocol: targeted evacuation, verification of the ventilation systems, contacting emergency services if needed, and recording the event.

After any incident, the board of directors should:

• Arrange an inspection of the combustion appliances and ventilation.
• Document the event in the register and the board’s minutes, then share the lessons learned with co-owners.
• Update the internal procedure and, where applicable, adjust the preventive maintenance plan.

Additional guide: maintenance and safety requirements – Quebec Safety Code, LégisQuébec.

Governing the matter: from the by-laws of the immovable to the annual general meeting

CO safety affects occupants’ daily lives and the syndicate’s overall compliance. Structure the matter as follows:

• By-laws of the immovable and declaration of co-ownership: specify individual responsibilities, such as monthly testing and end-of-life replacement in units, and collective responsibilities, such as common portions, the garage and alarms.
• Board policy: an internal policy summarizes installation, maintenance, record-keeping and communication. It makes it easier to welcome new co-owners.
• Communication: post a reminder in the common portions explaining the alarm procedure and send a seasonal reminder in the fall and winter.
• Annual general meeting and minutes: present a brief annual report on the condition of the common detector inventory, incidents and corrective actions, and approve the required budgets.

For ideas on structured management practices, browse our Services pages and the multiRent blog index.

FAQ – CO detectors in condos

Q1. My unit has no combustion appliance. Do I still need a detector?

• If the building has an indoor garage, boiler room or ducts that could communicate with your unit, a detector may be required. The board of directors must assess the risk and apply the requirements of the Code and the RBQ.

Q2. Where should I place the detector for optimal effectiveness?

• Outside the bedrooms, in the corridor leading to the sleeping areas, and in accordance with the manufacturer’s instructions. Avoid bathrooms and locations that are overly ventilated or too close to a combustion source.

Q3. What is the service life of a CO detector?

• Most must be replaced after 7 to 10 years, depending on the manufacturer. Some models display an “end of life” warning. Record the installation date in your maintenance logbook.

Q4. Can the syndicate require proof of monthly testing?

• Yes, if the by-laws of the immovable provide for it. The board of directors may request periodic confirmation, especially after an incident, and provide practical reminders to co-owners.

Q5. Is a specialized contractor required for garage systems?

• Yes. Detection systems connected to the ventilation and alarms in the common portions should be maintained by qualified contractors, in accordance with RBQ standards and instructions.

Additional sources and references:

• Quebec Construction Code – LégisQuébec
• Quebec Safety Code – LégisQuébec
• Carbon monoxide: prevention and detectors – RBQ
• Condo management best practices – RGCQ

This article provides general information and does not constitute legal advice. Consult a lawyer or notary regarding your situation.

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