In Québec’s metal plants, poor ventilation can turn a simple workshop into a high-risk zone
In high-heat industrial sectors like the metal industry, the ventilation system is not just about comfort: it is a critical issue for safety, productivity, and regulatory compliance. Fumes, airborne metal dust, flammable vapors, and extreme heat from melting or welding processes can create a literally explosive cocktail.
At AirGreen, we were recently called to intervene at a foundry in Longueuil, specializing in the production of aluminum parts for the aerospace industry. After a minor spontaneous combustion incident in a cutting area, management tasked us with conducting a complete HVAC audit, reconfiguring the equipment, and proposing long-term solutions to eliminate any risk of accidental fires.
Highly flammable environments: conditions that must never be underestimated
The main issue faced by this foundry was the build-up of micronized aluminum dust in the extraction ducts. At room temperature, these particles seem harmless, but they become highly flammable when accumulating near heat sources.
Additionally, the heat generated by the melting furnaces exceeded 600 °C, causing constantly elevated ambient temperatures in some zones, overloading old fans and uninsulated ductwork.
Our AirGreen mission: audit, action plan, and complete modernization
In response, our team specializing in heavy-duty industrial ventilation conducted a three-phase intervention:
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Thermal analysis of production zones, mapping hot airflows and identifying stagnation points.
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Full mechanical inspection of ducts, fans, safety dampers, particle filters, and intake vents.
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Evaluation of actual vs required airflow, based on production volumes and materials processed.
Audit findings: critical gaps threatening plant safety
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Insufficient secondary ventilation in cutting and sandblasting zones, causing progressive build-up of microparticles.
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Leaks in main exhaust ducts, reducing their suction capacity by 28%.
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Lack of temperature and pressure sensors on key duct segments.
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Irregular maintenance of industrial filters, leading to fine particles being reintroduced into the air.
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Non-compliance with CSA Z317.2 standards for industrial ventilation in high-risk environments.
Solutions implemented by AirGreen
With a tailored approach, we proposed and executed the following:
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Installation of high-capacity extractors, with spark-proof turbines and variable-frequency drive motors.
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Addition of insulated galvanized steel ducts, high-temperature resistant with internal fireproof coating.
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Smart detection system, with temperature and pressure sensors connected to the central control unit.
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Two-stage filtration (pre-filter + industrial HEPA) to capture metallic dust and oil vapors.
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Implementation of a quarterly HVAC maintenance program, including cleaning, calibration, and inspection of critical points.
Immediate benefits for the plant
Just three weeks after launching the new system, the results were tangible:
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36% reduction in average ambient temperature in melting zones.
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45% improvement in fine dust capture rate, based on air quality tests.
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Complete elimination of hot spots detected during our initial thermographic analysis.
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A notable increase in productivity, as employees now benefit from a healthier, safer environment.
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Full compliance with fire safety regulations required by the CNESST and industrial insurers.
Why industrial ventilation is a strategic element in metalworking
In a metal production line, ventilation doesn’t just remove hot air or filter pollutants. It serves as an active safety barrier, capable of preventing:
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Accidental fires caused by spontaneous dust combustion.
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Localized explosions in the presence of gases or volatile solvents.
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Respiratory issues in operators exposed to ultrafine particles.
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Malfunctions in sensitive equipment, affected by excessive heat.
Our AirGreen expertise serving Québec’s metal industries
At AirGreen, we understand the specific challenges of industrial environments in Montréal, Laval, Longueuil, North Shore, and South Shore. Our teams are trained to operate in extreme settings, where ventilation must be designed not just for comfort, but above all for major risk prevention.
We offer robust HVAC solutions, integrating the latest in detection, regulation, and filtration technologies, to ensure our clients:
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A compliant, healthy, and safe production environment.
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Durable systems, easy to maintain and scalable with plant growth.
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Comprehensive technical support, from the initial audit to final commissioning, with full documentation.
Is your metalworking plant showing signs of overheating, dust build-up, or faulty ventilation? Don’t wait for an incident. Trust AirGreen for uncompromising industrial HVAC expertise.