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CVC Commercial à Laval : Réfection et sécurisation du réseau de conduits pour un commerce de détail
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Commercial HVAC in Laval: Refurbishment and securing of the ductwork network for a retail business

A strategic mandate for a healthy and compliant business environment

At AirGreen , we were commissioned by a retail business in Laval to work on a network of ducts exposed to the ceiling, ensuring its mechanical safety , airtightness , and optimizing indoor air quality (IAQ) . The objective: to guarantee the comfort of customers and employees while complying with current commercial HVAC standards.

Project context

The business in question occupies a ground-floor space of approximately 450 m² , located in a recently built retail complex. Although the air conditioning and ventilation equipment was installed less than ten years ago, several problems have been noted:

  • exposed air ducts and piping, without sufficient insulation;

  • accumulation of dust on metal surfaces;

  • sections of protective grilles that are poorly fixed;

  • vibrations transmitted to the structure of the suspended ceiling.

These conditions could compromise the safety of maintenance personnel, impair energy performance, and create significant acoustic discomfort.

Technical diagnosis

Our specialist technicians carried out a detailed inspection of the distribution network and the air evacuation system.
The diagnosis revealed:

  • galvanized pipes not sealed at the joints;

  • an air return box with minor leaks;

  • an absence of anti-vibration support on the main section;

  • partially misaligned electrical wiring and HVAC piping;

  • a protective metal grid requiring structural reinforcement.

We also performed air flow rate (CFM) readings, static pressure measurements and a blowing temperature check to validate the distribution and efficiency of the system.

Technical solution implemented

For this project, AirGreen proposed an integrated and sustainable approach, focused on performance and compliance:

  1. Mechanical repair and anchoring

    • Replacement of defective fasteners with high-strength galvanized fasteners .

    • Installation of threaded rods with anti-vibration mounts conforming to CSA B52.

  2. Reorganization of technical conduits and ducts

    • Straightening and realignment of the main ducts to restore laminar airflow.

    • Thermal and acoustic insulation with mineral wool and aluminized vapor barrier.

  3. Sealing and waterproofing

    • Application of polymer-based HVAC sealant to all joints.

    • Smoke test to confirm the absence of leaks.

  4. Ventilation optimization

    • Installation of a CO₂ sensor connected to the building management system (BMS).

    • Rebalancing of flow rates for each sales area and warehouse.

  5. Electrical upgrades and inter-lot coordination

    • Securing the routing of HVAC cables and connection to the main panel.

    • Coordination with the electrical contractor for compliance with CSA C22 standards.

Construction progress

The project was planned in two nighttime phases so as not to disrupt business activities:

  • Phase 1: Securing and partial removal of the grates
    (9pm to 5am, dust-free operation thanks to containment curtains).

  • Phase 2: Mechanical overhaul and balancing
    (after-sales, full functional test upon opening of the business).

Each step was supervised by an RBQ-certified AirGreen foreman , ensuring compliance and cleanliness of the worksite.

Results and Key Performance Indicators (KPIs)

The results obtained at the end of the project were significant:

  • 18% reduction in energy consumption related to ventilation;

  • A measured improvement in IAQ of 27% , confirmed by a fine particle measurement;

  • Complete elimination of previously detected vibrations;

  • Average acoustic gain of 6 dB(A) in the sales area;

  • Full compliance with ASHRAE 62.1 and CSA B52 standards .

These performances have ensured stable comfort for customers and staff , while reducing operating costs.

Preventive maintenance and monitoring

AirGreen offered a comprehensive annual maintenance contract , including:

  • quarterly inspections of the conduit network;

  • complete cleaning of accessible sections (HEPA, UV-C, MERV 13 filters);

  • CO₂ and temperature sensor calibration;

  • detailed technical report submitted to the site manager.

This preventative approach allows the client to ensure continuous availability of the HVAC system and ongoing compliance with CNESST requirements.

Compliance, safety and sustainability

The project met the highest standards in terms of electrical safety, roof access and structural load .
The interventions were planned according to a strictly supervised lockout/ tagout protocol and working at height .
All materials used are recyclable and comply with LEED v4 guidelines.

Return on Investment (ROI) and Outlook

Thanks to this renovation, the business now benefits from:

  • a significant reduction in energy costs;

  • an improvement in perceived comfort;

  • of real estate value enhancement through environmental compliance.

The return on investment is estimated at 2.8 years , supported by an energy efficiency grant from Transition énergétique Québec (TEQ).

Conclusion

This intervention perfectly illustrates AirGreen's expertise in the repair, maintenance and modernization of commercial HVAC systems in Montreal and Laval.
Our ability to combine technical performance, regulatory compliance and operational planning makes AirGreen a preferred partner for any building manager or commercial owner wishing to optimize their indoor environment.

AirGreen – Excellence in commercial HVAC in Montreal, Laval, Longueuil, North Shore and South Shore.