Improving indoor air quality in Montréal isn’t a luxury — it’s a necessity, especially in certain neighbourhoods where environmental factors, residential density, and aging infrastructure increase the risks associated with poor ventilation. At AirGreen, we regularly step in to install, repair, or maintain HVAC ventilation systems in areas where residents are particularly exposed to high concentrations of indoor pollutants.
Here’s a close look at the 5 Montréal neighbourhoods where high-quality ventilation isn’t just recommended — it’s crucial for the health and comfort of those living there — all backed by relevant local statistics.
Why ventilation is essential in densely populated urban areas
HVAC ventilation ensures continuous air renewal, removes fine particles, eliminates excess humidity, and controls indoor contaminants. This is especially important in Montréal neighbourhoods where air pollution, mould issues, or outdated construction materials are common.
In Montréal, about 70% of residential buildings were built before 1980. These older structures often lack proper mechanical ventilation systems, posing a health risk — especially for children and seniors.
The 5 highest-risk neighbourhoods based on our on-site expertise
1. Hochelaga-Maisonneuve: historic charm meets chronic humidity
Located in the east end of Montréal, this neighbourhood features an aging housing stock. Many apartment buildings are poorly insulated, with recurring problems of humidity and mould.
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Local statistic: 32% of homes in Hochelaga show signs of abnormal indoor humidity (Source: CIUSSS de l’Est-de-l’Île-de-Montréal).
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AirGreen solution: Installation of heat recovery ventilation (HRV) systems to provide fresh air without sacrificing energy efficiency.
2. Plateau-Mont-Royal: high density, low air exchange
This popular neighbourhood is densely built, with many apartments having narrow windows, limited air circulation, and a high presence of domestic pollutants (smoke, cooking, cleaning products).
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Local statistic: Indoor VOC (volatile organic compounds) levels are 45% higher than the Canadian average.
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AirGreen solution: Discreet integration of compact, quiet HVAC systems, ideal for heritage buildings.
3. Villeray–Saint-Michel–Parc-Extension: industrial proximity and outdated ventilation
Located near former industrial zones, this neighbourhood is often exposed to outdoor pollutants that easily enter poorly ventilated buildings. Many homes still lack any form of mechanical ventilation.
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Local statistic: 4 out of 10 schools in this area report concerning indoor air quality (Source: Commission scolaire de Montréal).
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AirGreen solution: Retrofit of central ventilation ducts, installation of dual-flow systems for optimal pollutant extraction.
4. Verdun: riverfront location and ambient humidity
With its higher humidity levels and often poorly insulated basements, Verdun is a neighbourhood where we frequently encounter condensation, stagnant odours, and poor air circulation.
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Local statistic: In 2023, 1 in 5 homes in Verdun reported condensation or mould issues.
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AirGreen solution: Installation of humidity-sensor extraction fans, especially in bathrooms and basements.
5. Côte-des-Neiges–Notre-Dame-de-Grâce (CDN-NDG): architectural diversity and ventilation gaps
CDN-NDG features buildings from all eras, from single-family homes to public housing. The lack of uniformity makes finding ventilation solutions more complex.
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Local statistic: 40% of surveyed tenants report excessive summer heat and dry winter air — a clear sign of ventilation imbalance.
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AirGreen solution: Custom evaluations and installation of modular HVAC systems adapted to different building types.
What we observe during our fieldwork
Every HVAC ventilation system installation carried out by our teams begins with a full indoor air quality analysis. We use sensors to measure relative humidity, VOCs, fine particles (PM2.5), and CO₂. This allows us to recommend tailored solutions, adapted to the building type and the real needs of its occupants.
Customer story: Project on the Plateau
"There was always a lingering smell in our condo on the Plateau, especially in winter. AirGreen installed a small wall-mounted HRV system with a HEPA filter, and now the air feels fresh and clean. The difference is incredible!" – Julie R., Berri Street.
Why choose AirGreen for your ventilation projects in Montréal
We don’t just sell and install systems. At AirGreen, we guide every client through a full understanding of their ventilation needs. Our services include:
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A comprehensive indoor air quality audit.
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Installation of centralized or wall-mounted ventilation systems.
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Cleaning and maintenance of ductwork.
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Help navigating available grant programs in Québec.
Government grants and financial assistance
Did you know that several programs, like Rénoclimat and Chauffez Vert, can cover part of the cost of modern HVAC ventilation system installations?
Our advisors can help you:
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Check your eligibility.
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Prepare all necessary documents.
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Maximize your rebates.
Tips for improving air quality without major renovations
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Briefly but effectively air out your space every day, even in winter.
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Use a vented range hood when cooking.
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Avoid household cleaners rich in VOCs.
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Have your ducts inspected every 3 to 5 years.
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Install a CO₂ detector if you live in a sealed space.
Conclusion: Ventilation is a public health concern on a local scale
In Montréal, indoor air quality varies greatly from one neighbourhood to another. Housing conditions, ambient humidity, outdoor pollution, and urban density all contribute to making mechanical ventilation essential.
At AirGreen, we’re committed to providing every family with a healthier, more breathable, and more comfortable living environment — no matter which neighbourhood they live in.