Optimal commercial heating performance depends on precise indoor humidity control
In the world of commercial heating, we often talk about heating capacity, energy efficiency, grants, and next-gen systems. However, one essential factor is far too often overlooked: humidity control. At AirGreen, we understand that a successful commercial heating strategy in Montréal, Laval, Longueuil, the South Shore or North Shore is incomplete without smart management of indoor humidity levels.
The Quebec climate, with its long and harsh winters, creates a paradox: the need to efficiently heat large spaces while avoiding the discomfort caused by overly dry air. Here's why humidity control is far more than just a comfort factor — it's a matter of health, energy performance, and long-term durability for all types of commercial buildings.
Relative humidity: a critical parameter in commercial buildings
Relative humidity (RH) refers to the amount of water vapor present in the air compared to its maximum capacity at a given temperature. The ideal range is typically between 30% and 50%. When it drops below 30%, the impact on both occupants and infrastructure can be significant:
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Dry mucous membranes and respiratory discomfort for employees and clients;
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Static electricity, which is harmful to electronic equipment;
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Shrinking of construction materials, particularly wood;
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Increased spread of viruses and bacteria in dry environments.
In commercial buildings — offices, restaurants, retail stores, public facilities — these effects are amplified at scale, impacting productivity, health, and equipment lifespan.
How commercial heating worsens indoor dryness
During winter, outside air is naturally drier. When this cold air is heated by a HVAC system, its ability to hold moisture increases, while the actual water vapor content stays the same. The result? Warm, yet extremely dry indoor air.
That’s where humidity control solutions integrated into commercial heating systems come into play, allowing indoor environments to remain comfortable, healthy, and stable despite outdoor fluctuations.
Humidity control technologies: smart integration into commercial HVAC systems
At AirGreen, we offer cutting-edge commercial heating systems that include built-in humidity regulation. We work with:
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Steam or direct evaporation humidifiers, integrated into the air handling systems;
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Smart controllers that provide real-time humidity readings and automatic adjustments;
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Radiant heating systems that reduce air movement, limiting moisture loss;
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Equipment compatible with multi-zone regulation, ideal for buildings with complex layouts.
These technologies are already in place across several projects completed by our team in Montréal, Laval, and on the South Shore, including corporate offices, clinics, conference rooms, and large open commercial spaces.
Case study: humidity control in a training center in Longueuil
Last January, we were commissioned to modernize the HVAC heating system of a vocational training center located in Longueuil. The building, which includes large classrooms and technical workshops, suffered from very dry indoor air in winter, which led to:
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Frequent health complaints from staff and students (sore throats, eye irritation);
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Premature wear of computer equipment;
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Ongoing complaints about general discomfort.
We installed a Bosch BOVA central system with an integrated humidification module, combined with automated regulation based on ambient humidity levels. The results after three months:
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Stable 40% humidity levels throughout the entire building;
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A 30% reduction in health issues related to dry air;
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Overall comfort improved, as confirmed by internal satisfaction surveys.
Grants and energy efficiency: a winning combination
Humidity control isn’t just about comfort — it directly affects overall energy performance. Dry air feels colder, leading to unnecessary increases in thermostat settings. By properly regulating humidity, it’s possible to maintain a comfortable perceived temperature without overconsumption.
Additionally, many programs, such as Hydro-Québec’s LogisVert, recognize the value of these optimizations and offer grants to businesses upgrading their HVAC systems with smart humidity control.
Practical tips: what should you monitor?
Before integrating a humidity control solution into your commercial heating system, we recommend the following:
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Evaluate your current indoor humidity at different times of the day;
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Choose a humidifier suited to your building’s size and layout;
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Check compatibility with your existing HVAC systems;
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Schedule regular maintenance of your humidification unit to prevent mold and scale buildup;
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Request a comprehensive energy analysis to estimate medium-term savings.
Our AirGreen experts provide this personalized evaluation across Montréal, Laval, Longueuil, as well as the South Shore and North Shore, tailored to your specific needs and building conditions.
Why choose AirGreen for heating and humidity control?
With over 10 years of experience in commercial HVAC installations across Greater Montréal, we’ve developed a comprehensive and customized approach. Every project begins with an in-depth analysis of the building, usage habits, and technical constraints. We work with top-tier brands like Bosch, Goodman, Fujitsu, Gree, always offering a turnkey service.
Our goal? To deliver a comfortable, healthy, energy-efficient, and long-lasting commercial environment.