Montréal sets a new indoor air quality standard: air exchangers are now essential
At AirGreen, we’re seeing a clear shift in the field: more and more homeowners, building inspectors, and real estate developers are reaching out to us for air exchanger installations or upgrades. And it’s no coincidence. In Montréal, where buildings are often tightly sealed and winters are long and harsh, a high-performance air exchanger is no longer a luxury—it’s a technical and health requirement.
Many boroughs now require it in all new constructions, and recommendations are quickly expanding to major renovations as well. Beyond regulation, climate and health realities make this system a must-have in any properly designed HVAC plan.
Why indoor air in Montréal demands controlled mechanical ventilation
With buildings becoming increasingly airtight, air no longer renews itself naturally. The consequences:
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Build-up of CO₂ and VOCs (volatile organic compounds)
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Increased presence of mold and airborne bacteria
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Uncontrolled humidity levels, damaging both materials and respiratory health
These effects are amplified during Montréal’s long winters, when windows remain shut for months. An air exchanger becomes the only effective solution to maintain consistent, healthy air quality in homes and multi-unit buildings.
A real-world example in Villeray: compliance meets comfort
AirGreen was recently hired to equip a fully renovated duplex in Villeray. The goal: bring the building up to code while improving tenant comfort.
We recommended a Venmar EVO5 700 HRV air exchanger, perfectly suited for high-density residential spaces. Key features of this unit:
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Certified heat recovery efficiency of 75%
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Adjustable airflow up to 104 CFM, ideal for a 1,400 sq. ft. home
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Intuitive interface with seasonal programming
The installation required a full redesign of existing ductwork, and the addition of new supply vents in the bedrooms and living areas. After the final inspection, the building received its energy compliance certificate, and tenants reported a noticeable improvement in perceived air quality within the first weeks.
Growing regulatory requirements across Greater Montréal
Several municipalities in the metropolitan region are making mechanical ventilation systems mandatory in various contexts:
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New construction: Minimum fresh air flow per occupant is required
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Major renovations: Mandatory upgrade of existing ventilation systems
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Energy subsidies: Mechanical ventilation is required for eligibility
These requirements are backed by serious clinical and environmental findings. Stagnant indoor air contributes to rising cases of respiratory illness, allergies, and even chronic fatigue.
What are the real benefits of a high-performance air exchanger?
Beyond code compliance, a quality air exchanger offers:
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Significant reduction in ambient humidity: no more foggy windows
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Better filtration of allergens, dust, and mold spores
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Improved energy efficiency by reducing heat loss during air renewal
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Protection for indoor materials from humidity-related damage
AirGreen: your partner for compliant and optimized HVAC systems
We’ve been serving the entire Greater Montréal area for over 15 years with professional HVAC solutions fully aligned with the latest building regulations. Our installations are always:
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Based on a precise technical assessment (required airflow, building layout, occupancy needs)
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Equipped with top-tier brands: Venmar, Lifebreath, Fantech
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Optimized for comfort, health, and energy efficiency
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Eligible for subsidy programs like LogisVert and Rénoclimat
We tailor every project to our clients’ reality—whether it’s a bungalow in Ahuntsic, a condo in Griffintown, or a rental property in Côte-des-Neiges.
When is the right time to have your ventilation system assessed?
Here are a few signs your home may need an air exchanger:
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Persistent odors even after cleaning
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Foggy windows in winter
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You or your family experience allergies or respiratory irritation
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You’re planning renovations or an addition
A simple free assessment by our experts is often enough to identify potential improvements to your ventilation system.
In Montréal, a high-performance air exchanger is no longer optional. It’s a necessity.
At AirGreen, we guide you every step of the way—from analysis to installation, and ongoing maintenance. Breathe better. Live better.