Cooling Towers in Quebec Condominiums: Duties

Cooling towers remove heat from centralized air-conditioning systems. In a divided co-ownership, they are usually located in the technical common portions and involve clear responsibilities for the syndicate and the board of directors (board). If you are searching for “Quebec condo cooling tower obligations,” here is a practical guide, current as of 2026-06-22.

In Quebec, the Regie du batiment du Quebec (RBQ) strictly regulates the maintenance of water cooling towers to prevent legionellosis. Failure to comply with the requirements can lead to orders, fines and insurance claims in the event of a health-related incident. The board must therefore incorporate these obligations into the maintenance logbook (EUC), the common expenses budget and its work planning.

Who is responsible in a divided co-ownership, and what the declaration of co-ownership says

• In most divided co-ownerships, the cooling tower is a common portion. The declaration of co-ownership (DCV) often identifies it along with the central mechanical equipment.
• The syndicate, represented by the board, is responsible for compliance, maintenance contracts, monitoring water testing and keeping the records.
• Condo fees related to operation, water treatment and inspections are common expenses. Some declarations of co-ownership provide for a specific allocation key if not all co-owners use the system.
• Major decisions (e.g., major replacement or modernization) should be presented at the annual general meeting. Keep the resolutions and minutes to document the decision.

Governance tip: Include the tower and its associated network (basins, separators, dosing units and valves) in your maintenance logbook/EUC, and link it to the contingency fund study and contingency fund to plan replacements.

Legal framework in Quebec: key RBQ obligations

Quebec’s regime imposes minimum measures for all cooling towers in operation. Here are the core requirements, as published by the RBQ and under the Building Act (see the regulatory framework; current as of 2026-06-22):

• Registering the tower with the RBQ and updating the information (location, person responsible, start-up/shutdown).
• A written maintenance program, prepared and signed by a qualified professional (often an engineer), specifying cleaning cycles, disinfection, water treatment and monitoring.
• Keeping a log (journal) accessible on site: monitored parameters, visits, laboratory analyses, corrective measures and communications.
• Regularly monitoring water parameters (e.g., biocide, pH, conductivity and temperature) according to the minimum frequencies established in the program.
• Periodic Legionella testing by an accredited laboratory, at least throughout the operating period. Action thresholds require corrective measures and sometimes immediate disinfection.
• Seasonal start-up and shutdown procedures, as well as procedures for returning the tower to service after any prolonged shutdown, including preventive cleaning and disinfection.
• Prompt intervention and a graduated action plan in the event of out-of-range results, including communication with public health authorities if required by the program.
• Retaining documents (the program, logs, forms and results) for the period required by the regulations.
• Using competent contractors holding the appropriate RBQ licence for specialized work.

Official resources:

• RBQ — Water Cooling Towers
• RBQ — Cooling Tower Registry
• LégisQuébec — Building Act (B-1.1)
• LégisQuébec — Regulation respecting the maintenance of a water cooling tower

The maintenance program: minimum content and frequencies

A good program, approved by a professional, adapts the requirements to your building’s context. It clearly describes who does what, when and how, with intervention thresholds. The following elements are expected in a divided co-ownership:

• Inventory and diagram: tower, basin, heat exchangers, dosing units, sensors, blowdown, access points and sampling points.
• Standard procedures: start-up after winterization, mechanical cleaning, chemical disinfection, spill and blowdown management, lockout/tagout.
• Water treatment: biocides (rotation), corrosion inhibitors and scale inhibitors; dosing and monitoring.
• Typical minimum frequencies:
  • Operating checks: daily or according to use (water level, noise, drift, visible leaks and basic chemistry).
  • Parameter measurements: at least weekly for pH/conductivity/biocide if they are not monitored continuously.
  • Microbiological testing (Legionella): monthly during the operating period; more frequently if results are high or after interventions.
  • Cleaning and disinfection: at least annually and when returning the tower to service; more often if fouling occurs.
  • Integrity inspection: annually (structure, fill, fan, drift eliminators, belts, motor and basins).
• Action thresholds: Legionella levels that trigger internal notices, a review of the treatment and, if necessary, a temporary shutdown and disinfection.
• Required expertise: trained operators, a specialized contractor and an accredited laboratory.
• Health and safety: PPE, confined spaces, chemicals and rooftop access procedures.

Condo best practices:

• Standardize inspection-round forms and integrate them into your maintenance logbook/EUC. One syndicate we support reduced non-compliance simply by standardizing weekly rounds and centralizing the readings.
• Prepare a backup plan for a heat wave (e.g., delivery of process water and critical parts kept in stock) to limit impacts on co-owner comfort and on businesses in private portions, where applicable.

Document management, budgeting and insurance

• Records and traceability: retain the program, proof of training, contracts, test results and proof of disinfection. Archive at least the last 2-5 years, according to your policy and the regulations.
• Minutes and annual general meeting: when a result triggers an important action (emergency disinfection or service interruption), record the board’s decision in the minutes. Then inform the co-owners and answer questions at the annual general meeting.
• Budget and common expenses: budget for biocides, labour, laboratory testing and preventive maintenance in the annual budget. Allocate replacements (fan, fill, panel and basin) to the contingency fund according to the useful-life horizon.
• Insurance and health risk: your insurer may require proof of a compliant program and regular monitoring. The absence of records could complicate a claim in the event of a health-related incident.

To equip your board, see our operations management and financial management services, as well as recent articles on our blog.

Compliance: 7 steps for your board

1. Take inventory

   • Confirm whether there is a tower, its model, capacity, serial numbers and associated licences.
   • Check the declaration of co-ownership to confirm that it is a common portion and to verify the cost-allocation keys.

2. Register with the RBQ registry

   • Validate the equipment’s registration and record in the RBQ registry. Correct the address, the name of the person responsible and the status (in service/out of service).

3. Retain the right professionals

   • Retain an engineer to establish or review the maintenance program. Entrust operations to a contractor holding the relevant RBQ licence and employing a trained team.

4. Set up a testing protocol

   • Select an accredited laboratory for Legionella testing. Establish the frequencies and action thresholds, and specify internal communications in the event of an exceedance.

5. Organize inspections and documentation

   • Set up simple daily/weekly/monthly forms. Centralize everything at the management office or in a documented file cabinet in the mechanical room.

6. Plan for winterization and return to service

   • Define the shutdown, draining, cleaning and disinfection steps before operation. Document everything in the log.

7. Inform the co-owners

   • Prepare an information sheet covering operation, benefits, risks and the protocol to follow in the event of an irregularity. File it with the board’s minutes and share it through the portal.

Frequently asked questions (FAQ)

Q1. Our divided co-ownership is exclusively residential and small. Are we still covered?
Yes. If the equipment is a water cooling tower in operation, the RBQ framework applies regardless of size. The maintenance program can, however, be proportionate to the use.

Q2. Do we have to take samples in winter?
If the tower is shut down and properly winterized, the program may suspend sampling until it is returned to service. If it operates during the winter, maintain the required frequencies.

Q3. Who pays: the contingency fund or the annual budget?
Routine operations (treatment, testing and inspections) fall under the annual common expenses budget. Major replacements and planned upgrades typically come from the contingency fund.

Q4. If Legionella results are high, do we have to shut down immediately?
The program provides for graduated action thresholds. Depending on the level, treatment corrections, cleaning/disinfection and sometimes a temporary shutdown may be required, with closer monitoring through follow-up testing.

Compliance note: requirements may change; regularly check the RBQ and LégisQuébec pages for official updates.

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

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