Have you just bought a condo in downtown Montreal? Or maybe you’ve been a homeowner for a few years and are starting to notice condensation on your windows, strange odors coming from who knows where, or that feeling of stale air when you walk in the door?
You're not alone. About 35 % of condos in Montreal have humidity or mold problems caused by inadequate ventilation. It's not just a comfort issue—it's a health issue.
Ventilation in condos, It's complicated. Unlike a single-family home, where you control your entire system, in a condo, you often share ducts with your neighbors. The system can be centralized, individual, or a mix of both. And who's responsible for what? That's where it gets complicated.
At Vortex Air, we’ve been inspecting condos in Montreal for over 10 years. We’ve seen downtown high-rises with sophisticated systems and simple problems. We’ve seen suburban condos with basic systems and major issues. What we can tell you for sure: regular inspection of your ventilation system isn’t a luxury—it’s a necessity.
Why Ventilation Inspections Are Crucial in Condos
Here’s what happens when the ventilation system in a condo isn’t working properly. Moisture builds up because the air isn’t being refreshed enough. This moisture promotes the growth of mold, often in hidden places such as behind walls or in ducts. The spores circulate in the air you breathe.
What are the health consequences? The Institut national de santé publique du Québec (INSPQ) reports that prolonged exposure to mold can cause respiratory irritation, allergies, asthma, and even infections in vulnerable individuals. Children and the elderly are particularly at risk.
As for the building itself, it’s no better. Excessive moisture damages building materials, compromises insulation, and can cause corrosion in metal components. We’ve seen condos where repairs cost tens of thousands of dollars because the problem wasn’t detected in time.
Your day-to-day comfort suffers as well. Stuffy air in the summer, dry air in the winter, lingering odors, and irritating ventilation noises. Your condo should be your sanctuary, not a constant source of stress.
The good news? Most of these problems can be detected and corrected before they become serious. That’s exactly why regular inspections are so important.
Moisture and Mold: Risks to Health and Buildings
The ideal relative humidity in a condo is between 30 % and 50 %. Below 30 %, the air becomes too dry and causes irritation. Above 50 %, you create the perfect conditions for mold.
In Montreal, humid winters and hot summers pose a constant challenge. In downtown high-rises, moisture infiltration problems are common due to the building envelope or pressure differences between floors. Condos on lower floors may be cooler and more humid, while those on higher floors are often drier due to excessive heating.
The most common types of mold found in Montreal condos? Aspergillus, Penicillium, and Cladosporium. These names might not mean much to you, but they’re fungi that can seriously affect your quality of life. They grow in poorly ventilated bathrooms, behind furniture placed right up against exterior walls, in closets, and especially in poorly maintained ventilation systems.
Winter is particularly problematic. When it’s -20 °C outside and 21 °C in your condo, the temperature difference causes condensation. If your ventilation system doesn’t remove this moisture effectively, it condenses on cold surfaces. That’s why you see water on your windows in the morning.
Common symptoms among occupants
How can you tell if your faulty ventilation system is affecting your health? Here are the most common signs our clients report before having their condos inspected.
You wake up with a stuffy nose or a sore throat, but it gets better when you leave the condo. You cough more often for no apparent reason. Your eyes are red or irritated, especially in the morning. You have frequent headaches that go away when you go outside for some fresh air.
Persistent odors are also a major indicator. A musty or damp, earthy smell that keeps coming back, even after cleaning. A stale smell when you return home after being away for a few days. Cooking or smoke odors coming from other units that linger in your space.
If you have asthma or allergies, you may notice that your symptoms get worse at home. You use your inhaler more often. You need more antihistamines. This is a clear sign that the air quality in your condo is a problem.
Chronic fatigue and difficulty concentrating can also be linked to poor ventilation. When CO2 levels are high because the air isn’t being refreshed enough, your brain receives less oxygen. You feel lethargic without knowing why.
Bill 16 and Requirements for Unions
If you are a member of a condominium association, you have probably heard of Bill 16. This Quebec legislation imposes new obligations on condominium associations regarding the upkeep and maintenance of buildings, including ventilation systems.
Since the passage of this bill, condominium associations must maintain a detailed record of all maintenance work performed on common systems, including the ventilation system. This record must document inspections, repairs, and component replacements. This isn’t just paperwork—it’s legal protection for all co-owners.
Fines for noncompliance are severe. The Régie du bâtiment du Québec (RBQ) may impose penalties ranging from 2,500 $ to 25,000 $, depending on the severity of the violation and whether it is a repeat offense. These fines are paid by the homeowners’ association, and thus ultimately by all co-owners through their condo fees.
Collective responsibility is an important concept to understand. In a condo, you’re not just responsible for your own unit. The homeowners’ association has obligations to all residents. If the central ventilation system malfunctions and causes health problems, the homeowners’ association may be held liable.
Mandatory audits are now commonplace. The RBQ may request to see the maintenance log, inspection reports, and proof that the recommended work has been completed. A union that cannot provide this documentation puts itself in a legally vulnerable position.
At Vortex Air, we help condominium associations stay compliant. We provide detailed reports that can be integrated directly into the registry. We document everything with photos, measurements, and clear recommendations. This makes life easier for managers and protects all unit owners.
Common Ventilation Problems in Montreal Condos
Every condo is unique, but we see the same problems come up again and again. Understanding these issues will help you know what to look out for and when to request an inspection.
Negative pressure is a common problem in condos with centralized ventilation. It happens when the air being extracted from your unit exceeds the amount of fresh air coming in. The result? Your condo draws in air from the common ducts, hallways, and sometimes even other units. That’s how your neighbors’ cooking odors end up in your home.
Shared central ducts may seem convenient on paper, but they’re a common source of problems. Contaminants, odors, and noise—all of these can travel from one unit to another. If a neighbor smokes or uses strong chemicals, you might smell them in your home even with your windows closed.
Improperly calibrated heat recovery ventilators (HRVs) are a classic problem. These units are designed to bring in fresh air while recovering heat from the exhaust air. But if they’re set incorrectly—too low or too high—they create more problems than they solve. We often see HRVs running at full capacity all the time, wasting energy, or barely running at all, causing the air to stagnate.
Odors from underground parking garages mainly affect units on the first floor. Exhaust fumes, oil, chemicals—all of these can travel up through the ducts if the system is poorly designed or improperly balanced.
According to our observations, winter breakdowns increase by 20 %. Extreme cold can freeze air exchangers, block exhaust ducts, and cause condensation problems. A system that works well in the summer can completely fail in February.
Common Myths About Ventilation in Condos
We often hear condo owners say, «Ventilation is my individual responsibility; the homeowners» association only takes care of the common areas.” ” This is not true in most cases. Ventilation systems are almost always partially or entirely managed by the homeowners’ association. Even if you have an HRV in your unit, it’s likely connected to shared ducts.
Myth #1: My condo is new, so I don't need an inspection.
New condos often have the worst ventilation problems. Why? Because the systems are never properly balanced after construction. The contractor installs the equipment according to the plans, but no one checks to see if it actually works as intended. We’ve inspected condos less than a year old with major problems.
Myth #2: Opening the windows for a few minutes a day is enough.
In the middle of a Montreal winter? You’ll just end up cooling down your condo and driving up your heating bill. Controlled mechanical ventilation isn’t a luxury—it’s essential for maintaining consistent air quality without losing all your heat.
Myth #3: Cleaning the ducts solves all problems.
Cleaning is part of the solution. But if your system is improperly calibrated, if the airflow rates are inadequate, or if the heat exchanger is faulty, cleaning the ducts won’t solve these problems. That’s why a thorough inspection is important before deciding what work needs to be done.
Myth #4: The responsibility for maintenance always falls on the union.
It depends on your condominium declaration. Some condominium associations are responsible for the entire system, including the components within the private units. Others manage only the common ducts. You should read your declaration to understand your specific obligations.
Specific Challenges of Towers vs. Suburban Units
Condos in downtown Montreal—including the Ville-Marie towers, Old Montreal, and Griffintown—face unique challenges. The height of these buildings creates significant pressure differences between floors. The chimney effect causes warm air to rise naturally, creating negative pressure on the lower floors and positive pressure on the upper floors.
In these high-rises, the infiltration of cigarette or cannabis smoke is a major problem. Air follows the path of least resistance, often through shared ducts, service ducts, and even electrical outlets. We helped residents on the 15th floor who could smell smoke coming from someone on the 8th floor.
Calibrating CRVs in high-rise buildings is more complex. Each floor requires different adjustments to compensate for pressure effects. A CRV set to the standard setting on the 20th floor will likely cause problems with over-ventilation or under-ventilation.
Suburban condos—in Laval, the South Shore, and the West Island—typically have simpler, more independent systems. Often, each unit has its own HRV that isn’t connected to a centralized system. This makes it easier to manage individually, but it also means that the responsibility for maintenance falls entirely on you.
In suburban condos, problems stem more often from a lack of maintenance than from design flaws. Owners forget to change the filters, neglect annual cleaning, and ignore unusual noises. After a few years, the system is operating at 50 % of its original capacity.
Single-story units in the suburbs also have fewer problems with odors seeping in, but are more prone to excessive moisture in the winter if ventilation is inadequate. The building envelope is often less airtight than in new high-rises in the city center.
How Is a Professional Ventilation Inspection Conducted?
When Vortex Air inspects a condo, we look at two distinct aspects: your private unit and the common areas. Both are important for getting a complete picture of your situation.
Our process always begins with a conversation. We ask you what’s on your mind, how long you’ve been noticing problems, and what symptoms you or your family are experiencing. This gives us some clues about where to focus our attention.
For the private unit, we inspect all air inlets and outlets. We measure airflow rates using anemometers. We verify that air is circulating as it should. We test CO2 levels, relative humidity, and temperature in various rooms.
For common areas, we need the homeowners’ association’s cooperation. We examine the shared ducts, inspect the mechanical room, and check the condition of the main fans. We use infrared thermography to detect air leaks and insulation issues around the ducts.
Mohamed and Omar personally oversee condo inspections in downtown high-rises. They are familiar with the typical systems found in Montreal's large buildings and know exactly where to look for problems.
Our technicians are INVC-certified, and we are in the process of obtaining NADCA certification. We use calibrated equipment and follow rigorous protocols. You don’t just receive a generic report—you get a detailed assessment of your specific situation.
Inspection of the Private Unit
In your unit, start with the ventilation grilles. Measure the airflow at each supply and exhaust grille. Standards recommend specific airflow rates based on the size and function of each room. A bathroom should exhaust about 50 cubic feet per minute (CFM). A kitchen, on the other hand, should exhaust 100 CFM or more.
We check your HVAC system, if your unit has one. We inspect the filters—are they clean, the right type, and properly installed? We examine the heat exchanger for dirt, ice, or damage. We test the operation of the motors and dampers.
CO2 measurements are taken in your living room and bedrooms. If levels exceed 1,000 ppm while you’re at home, that’s a clear sign that the air isn’t being refreshed enough. We’ve seen bedroom levels reach 1,500 ppm or higher overnight when the doors are closed.
Relative humidity is measured using precise hygrometers. We also look for visual signs of excessive moisture: condensation on windows, stains on walls or ceilings, and musty odors. We use moisture detectors to check inside the walls if necessary.
Checking for mold is part of the visual inspection. We look inside closets, behind furniture, and in dark corners. If we find any visible mold, we’ll point it out to you and document it with photos. To confirm the type and extent of the mold, laboratory testing may be necessary.
We also measure the pressure difference between your unit and the common hallway. A significant negative pressure difference explains why you can smell odors from the hallways or other units.
Inspection of Common Areas
For shared ducts and the centralized system, access to the mechanical room and service cavities is required. This is where things get more complicated, and cooperation from the homeowners’ association is essential.
We visually inspect the interior of accessible ducts using specialized cameras. We look for dust buildup, debris, signs of mold, and structural damage. Ducts that have never been cleaned since the building was constructed may contain surprising amounts of dirt.
Infrared thermography is a powerful tool for detecting air leaks and insulation defects. We scan walls, ceilings, and around ducts with a thermal camera. Areas that appear cooler or warmer reveal where air is escaping or where insulation is failing.
Depressurization tests help us understand how air flows through the building. We measure pressure levels on different floors and in different areas. This reveals the imbalances that cause odor infiltration and drafts.
We also assess the condition of the main fan and mechanical equipment. We check the motors, belts, filters, and dampers. We measure excessive vibrations that indicate problems with bearings or imbalance.
Recommendations for unions often include major projects: thorough duct cleaning, replacement of worn-out components, system rebalancing, and insulation upgrades. We prioritize these based on urgency and provide cost estimates.
Report and Recommendations
You’ll receive the Vortex Air report within 48 hours. It’s a comprehensive document that includes photos, graphs, detailed measurements, and clear explanations in French. We don’t use technical jargon without explaining it.
The compliance table compares your results to the recommended standards. You can immediately see where you are in compliance and where you have issues. Each discrepancy is accompanied by an explanation of its potential impact.
The recommendations are categorized by priority: urgent (to be addressed within the month), important (to be scheduled within 3–6 months), and preventive (to be considered if appropriate). Each recommendation includes an estimate of the expected costs and benefits.
We also provide information on available grants. The Rénoclimat program offers financial assistance for various types of ventilation-related work. We can guide you through the process of applying for these grants, which often cover 30 % to 50 % of the costs.
Priorities for action are determined based on several factors: impact on health, regulatory compliance, costs of delaying action, and return on investment. We provide you with the tools you need to make informed decisions.
Schedule your inspection with our experts
Are you ready to find out exactly what's going on with your condo's ventilation system? Vortex Air offers comprehensive inspections tailored to Montreal condos, whether you live in a downtown high-rise or a suburban complex.
Our team of certified technicians comes to your home with all the necessary equipment. We’ll give you a clear picture of your situation, without pressuring you into unnecessary work. If your ventilation system is working properly, we’ll let you know. If you have any issues, we’ll explain exactly what to do.
Contact us to schedule your inspection : Call 514-214-7492 (available 24/7), visit vortexair.ca, or email info@vortexair.ca. The initial assessment and quote are free. We’re open seven days a week, from 7 a.m. to 9 p.m.
Costs and Subsidies for Ventilation Inspections
Let's talk about money, because it's a legitimate question. How much does it cost to have a condo's ventilation system inspected at Montreal? It depends on several factors, but we can give you some realistic figures.
For a standard private unit (2- or 3-bedroom apartment), a comprehensive inspection costs between 400 $ and 550 $. This includes air quality measurements, inspection of the HRV (if present), verification of airflow rates, and a detailed report.
For a building-wide inspection—including common areas, shared ducts, and the mechanical room—expect to pay between 800 $ and 1,200 $, depending on the size of the building and the complexity of the system. For large buildings with 50 units or more, the cost can reach up to 2,000 $ or 2,500 $ for a comprehensive assessment.
Do these costs seem high to you? Let’s compare them to the consequences of not having an inspection. Emergency repairs to a faulty ventilation system can easily cost between 5,000 $ and 15,000 $. What about treating a mold infestation? Between 3,000 $ and 10,000 $, depending on the extent of the problem. Health problems caused by poor air quality? They’re priceless.
Preventive inspections are the most cost-effective investment you can make. They allow you to plan the necessary work, budget properly, and avoid costly emergencies.
Energy savings after optimizing a ventilation system can range from 15 % to 25 % on your heating and cooling costs. For a typical condo, that amounts to 200 $ to 400 $ per year. The inspection pays for itself in two or three years based on energy savings alone.
Cost Comparison: Private Inspections vs. Labor Unions
If you have just your unit inspected, you’ll pay an individual fee ranging from 400 $ to 550 $. This is ideal if you want to understand your personal situation or if you’re buying a condo and want to know what you’re getting into.
But here's the thing: many ventilation problems in condos stem from the central system, not from your unit. If the homeowners' association doesn't inspect the common areas regularly, you might fix problems in your unit without addressing the root cause.
An inspection at the condominium association level costs more in absolute terms, but when divided among all the co-owners, it often amounts to 20 $ to 40 $ per unit in a medium-sized building. And everyone benefits from the improvements made to the centralized system.
At Vortex Air, we encourage homeowners’ associations to schedule group inspections. We offer discounted rates when multiple units are inspected at the same time. If 10 owners in the same building want to have their private units inspected during the same visit, we can reduce the per-unit cost from 15 % to 20 %.
Condominium audits also include a presentation to the board of directors. We explain the results, answer questions, and help the board prioritize projects based on the available budget. This service greatly facilitates decision-making.
Rénoclimat Grants and Local Programs
The Quebec government’s Rénoclimat program offers substantial grants for improving residential ventilation. This applies to condos as well, not just single-family homes.
For the installation of a new HRV or the replacement of an outdated system, the subsidy can range from 1,000 $ to 3,000 $, depending on the type of equipment and its energy efficiency. That’s no small amount when a high-quality HRV costs between 3,000 $ and 6,000 $ to install.
According to Transition énergétique Québec, uptake of these grants has increased by 25 % since 2023. More and more homeowners are realizing that financial assistance makes home improvements much more affordable.
Grants typically cover 30 % to 50 % of the total cost of eligible work. For a ventilation project costing 8,000 $, you could receive 2,400 $ to 4,000 $ in government assistance.
The process is simpler than you might think. First, you need to have your condo assessed by a Rénoclimat advisor (Vortex Air can refer you to accredited partners). You’ll receive a report listing the recommended work. You’ll have the work done by qualified contractors. A post-work inspection confirms that everything is up to code. You’ll receive your grant.
Hydro-Québec also offers rebates for energy-efficiency improvements. Some condominium associations may be eligible for commercial programs that offer even more generous incentives.
The City of Montreal occasionally offers grant programs to improve indoor air quality, especially for older buildings. It’s worth checking regularly to see what programs are available.
Plan your ventilation projects and take advantage of available grants — We'll help you navigate the programs and maximize your savings.
Practical Tips for Maintaining Optimal Ventilation
Once your system is in good working order, maintaining it doesn't take much effort. But consistency is key. Here's what you can do on your own to keep your ventilation system in good working order.
Replace or clean the filters in your HRV or ventilation system every three months. This is the simplest and most important step. Clogged filters reduce airflow by 30 % to 50 %. High-quality filters cost 20 $ to 40 $—a minimal investment.
The heat exchanger in your HRV should be cleaned once a year. You can do this yourself by following the manufacturer’s instructions. Remove the heat exchanger, rinse it with warm water and mild soap, and let it dry completely before putting it back in place.
Keep the vents in your rooms clear. Don't place furniture in front of them, and don't let curtains block the airflow. We often see people put a sofa in front of an intake vent or install shelves that block the airflow. This throws the entire system out of balance.
Keep an eye on the humidity in your condo. If you regularly see condensation on your windows, it’s a sign that your ventilation system isn’t removing enough moisture. Use the extra ventilation in your bathroom after every shower—let it run for 15 to 20 minutes.
In the winter, avoid completely closing the dampers on your HRV to save energy. It may seem logical to reduce the flow of cold air, but doing so creates humidity and air quality issues that will cost you more in the long run.
Have your system inspected by a professional once a year. Even if everything seems to be working properly, a qualified technician can detect emerging problems before they become serious. At Vortex Air, we offer annual maintenance contracts that include inspection, component cleaning, and filter replacement.
Regular Monitoring and IAQ Technologies
Indoor air quality (IAQ) sensors are more than just a futuristic gadget. According to our observations, about 25 % of Montreal condos have now installed this type of technology. These devices monitor CO2, VOCs, PM2.5, humidity, and temperature in real time.
The big advantage? You know exactly what’s going on in your condo without having to guess. Do you see that CO2 levels rise to 1,300 ppm every night in your bedroom? You know you need to increase ventilation or adjust your HRV.
Modern sensors connect to your phone. You receive alerts when critical thresholds are exceeded. Some can even sync with your ventilation system to automatically adjust airflow as needed.
A good IAQ sensor costs between 200 $ and 400 $. For someone who takes their health seriously or has respiratory problems, it’s a worthwhile investment.
Vortex Air can install and configure these sensors for you. We’ll show you how to interpret the data and how to adjust your system based on the readings. It’s like having a technician monitoring your air 24/7.
Real-time monitoring also lets you see the impact of your actions. Are you cleaning with eco-friendly products instead of bleach? You’ll see VOC levels stay low. Are you cooking a big meal? You’ll see CO2 and particulate matter levels rise, then drop again as the ventilation system does its job.
Proactive alerts can literally save your health. If your sensor detects a sudden spike in humidity or particulate matter, it could indicate a mold problem, a leak, or a ventilation malfunction. You can take immediate action instead of discovering the problem weeks later.
Simple Steps to Prevent Moisture and Odors
We’ve already mentioned maintaining the filters in your HRV, but it’s so important that we’ll say it again. Every three months, remove the filters and check their condition. If they’re dirty, replace or clean them, depending on the type. Set a reminder on your phone if necessary.
Be sure to use the mechanical ventilation in your bathroom every time. After each shower, let the fan run for 15 to 20 minutes. This removes moisture and prevents mold from growing on tile grout and in corners.
Occasional ventilation can help, but do it wisely. Opening the windows for 5 to 10 minutes a day when the weather permits is fine. But not in the middle of winter when it’s -25 °C, and not in the summer when it’s very humid outside. You’ll just be adding moisture to your condo.
Managing humidity while cooking is important. Use your range hood every time you boil water, cook, or use the oven. These activities add a lot of moisture to the air. The range hood vents this moisture outside.
Avoid drying laundry on drying racks inside your condo. This releases a lot of moisture into the air. If you don’t have a dryer, use a shared laundry room or a commercial laundry facility. Excess moisture from drying laundry can easily cause your relative humidity level to rise from 40 % to 65 %.
Houseplants: Use them in moderation. Yes, they do have some benefits for air quality, but they also increase humidity, especially if you have a lot of them. If you notice humidity issues, reduce the number of plants or make sure your ventilation system can handle the load.
Never block the air return vents with furniture or decorations. These vents allow air to circulate into the ventilation system. If you block them, you create dead zones where air stagnates and moisture accumulates.
Why Choose Vortex Air Ventilation in Montreal
There are several companies that offer ventilation services in Montreal. Why choose Vortex Air for your condo inspection? Let us explain what sets us apart.
Our local expertise is genuine. We’ve been working in Montreal for over 10 years. We’re familiar with the typical systems found in downtown high-rises, condos on the Plateau, in Griffintown, and in Ville-Marie. We’ve seen the specific issues with buildings constructed in the ’70s, those from the ’90s, and today’s new condos.
Mohamed and Omar, the co-owners, personally oversee major inspections. They don’t sit in an office crunching numbers. They’re out in the field, they understand the issues, and they speak directly with customers. This personal approach makes all the difference.
Our team of more than five INVC-certified (and soon-to-be NADCA-certified) technicians follows industry best practices. We continuously invest in training and equipment. The measuring devices we use are calibrated and certified. The results you receive are reliable.
Transparency is our hallmark. We show you exactly what we find. We explain what it means. We give you options for fixing the problems, along with estimated costs, without pushing you toward the most expensive solution. If your system is working well, we’ll tell you so honestly.
We work seven days a week, from 7 a.m. to 9 p.m. Do you work all week and are only available on Saturday mornings? No problem. Would you prefer that we come on a Sunday afternoon? We’re here for you. Many companies don’t offer this kind of flexibility.
More than 500 satisfied clients in the Montreal area have placed their trust in us. We’ve inspected condos of all sizes in every neighborhood. This diverse experience allows us to quickly understand your situation and offer you tailored solutions.
Transparent audits are what set us apart. Our report is comprehensive and clear, complete with photos and detailed measurements. You won’t receive a vague two-page document. You’ll get a professional 10- to 15-page assessment that documents everything we found.
Unique Methodology
Vortex Air’s condo inspection follows a five-step protocol developed through hundreds of inspections. Step one: the initial interview. We listen to you. What are your concerns? What symptoms have you noticed? This conversation guides our inspection.
Step 2: A thorough visual inspection. We examine your unit from top to bottom. We look inside cabinets, under sinks, and behind accessible furniture. We check for signs of mold, condensation, and water leaks.
Step 3: Instrumental measurements. We bring out our measuring devices: CO2, relative humidity, temperature, airflow rates, and differential pressures. We take readings in each room, document them, and compare them to the standards.
Step 4: Inspection of the ventilation system. We examine your HRV or the components in your unit. We check the filters, the heat exchanger, the motors, and any accessible ducts. If we have access to common areas, we also inspect the central ventilation system.
Step 5: Analysis and Report. We compile all the data, identify the issues, determine the likely causes, and make clear recommendations. The report is delivered to you within 48 hours along with all the necessary documentation.
A thermographic inspection, when necessary, reveals what the naked eye cannot see. Air leaks around windows, insulation defects, hidden moisture infiltration—all of these are clearly visible in the thermal images. We include these images in your report along with explanations.
Our report doesn't just give you a list of issues. We explain the impact of each issue, prioritize corrective actions, estimate costs, and suggest alternative solutions whenever possible. You'll have all the tools you need to make informed decisions.
Customer Testimonials
Here’s what our Montreal condo clients have to say about our service. Marie-Claude, owner of a 12th-floor condo in downtown Montreal: «I’d been having constant headaches ever since I moved in. Vortex Air found that my HRV was completely out of balance and that CO2 levels were rising to 1,600 ppm at night. After the adjustments, I’m sleeping better and my headaches are gone.»
François, a member of the board of directors of a homeowners« association in Ville-Marie: »We knew we had odor problems in the building, but we didn’t know where they were coming from. The inspection by Vortex Air revealed that our shared ducts had never been cleaned in 15 years and that the system was completely out of balance. Their report helped us justify the work to the co-owners.”
Stéphanie, a new homeowner in the Plateau: «I had my condo inspected before buying it. The inspection by Vortex Air found mold hidden behind a wall and major problems with the HRV. I was able to renegotiate the purchase price to cover the repairs. It saved me thousands of dollars.»
Customer satisfaction after an inspection is our best form of advertising. Most of our new clients come to us through referrals. Someone in their building hired us and was so satisfied that they recommended us. That’s the kind of reputation you can’t buy—you have to earn it.
Request a free inspection today
Do you want to finally understand what's going on with the air you breathe in your condo? Vortex Air offers you a free, no-obligation initial assessment. We'll come assess your situation, give you our honest opinion, and provide you with a clear quote.
Our team serves the entire Greater Montreal area—downtown, the Plateau, Ville-Marie, Griffintown, Old Montreal, the North Shore, and the South Shore. We understand the specific challenges of each area.
Schedule your inspection now : Call 514-214-7492 (available 24/7), visit our website at vortexair.ca to fill out the contact form, or email us directly at info@vortexair.ca. We’ll call you back shortly to schedule an appointment that fits your schedule.
The personalized assessment we provide takes your unique situation into account. Every condo is different, and every system has its own specific characteristics. We give you recommendations tailored to your specific circumstances, not generic solutions.
FAQ – Everything You Need to Know About Ventilation Inspections in Condos
How often is it recommended to inspect a condo's ventilation system?
We recommend a thorough inspection once a year, ideally in the spring or fall. This complies with the requirements of Bill 16 for centralized systems. If you have an individual HRV in your unit, an annual inspection helps detect problems before they affect your health or cause damage.
If you’re buying a condo, have it inspected before finalizing the purchase. It’s just like a building inspection—it protects you from costly surprises. If you’ve recently done renovations or have had problems with moisture or mold, a follow-up inspection is recommended after six months.
What exactly does Bill 16 cover with regard to condominium associations?
Bill 16 requires condominium associations to maintain a detailed record of all maintenance work performed on common areas, including centralized ventilation systems. The record must document inspections, repairs, and component replacements, along with the dates and names of the contractors.
Unions must also plan and budget for preventive maintenance. This means not just reacting when something breaks, but anticipating needs and planning maintenance work. The RBQ may request to see this record during an inspection and impose fines if the documentation is incomplete or if maintenance has been neglected.
For co-owners, this means that your homeowners’ association now has a legal obligation to maintain the ventilation systems. If you believe that maintenance is being neglected, you can request to see the maintenance log and demand that the board take action.
What are the signs of a ventilation failure?
There are several signs that can alert you to this problem. Excessive condensation on your windows in the winter is a classic indicator. A little condensation in the morning is normal. But if your windows are completely soaked and water is running down the frames, your ventilation system isn’t removing enough moisture.
Persistent odors that keep coming back, even after cleaning. A musty or stale smell, or cooking odors coming from other units. If you can smell what your neighbors are cooking or if their cooking smells drift into your home, there’s likely a problem with the air pressure or the vents.
Health symptoms that improve when you leave your condo. Headaches, nasal congestion, eye irritation, fatigue—if these symptoms subside when you go to work or on vacation, it’s a strong indication that the air quality in your home is a problem.
Unusual noises in your ventilation system. Whistling, squeaking, or excessive vibrations. These may indicate worn-out components, blocked dampers, or an unbalanced system.
Do new condos need to be inspected?
Absolutely. New condos often have the worst ventilation problems because the systems are rarely balanced properly after construction. The contractor installs the equipment according to the plans, but no one checks to see if the airflow rates are adequate in each unit.
We inspected condos less than six months old where CO2 levels exceeded 1,400 ppm because the HRV was set to the minimum setting to save energy during the warranty period. In other units, the ducts were partially blocked by construction debris that no one had bothered to clean up.
New building materials also release more VOCs during the first few years. Paint, adhesives, flooring, cabinets—all of these emit volatile organic compounds. Adequate ventilation is even more important in a new condo to remove these pollutants.
If you're buying a new-construction condo, have it inspected within the first three months. If any problems are found, you're still under warranty, and the builder must fix them at no cost to you. Wait two years, and you'll have to pay out of pocket.
What grants are available for upgrading VRCs?
The Rénoclimat program offers grants ranging from 1,000 $ to 3,000 $ for the installation of a new HRV or the replacement of an outdated system. The exact amount depends on the energy efficiency of the new system. An ENERGY STAR HRV with a heat recovery rate of 75 % or higher qualifies for the maximum grant.
Hydro-Québec also offers rebates for home improvements that reduce energy consumption. These rebates can be combined with Rénoclimat grants, which can cover 40 % to 50 % of your project’s total cost.
Some condominium associations may be eligible for programs for multi-unit buildings. These programs sometimes offer even more generous grants for large-scale projects involving multiple units.
The key to obtaining these grants is to follow the process correctly. First, have your condo assessed by a Rénoclimat-certified advisor. Have the work done by qualified contractors. Schedule a post-construction inspection. Submit your application. Vortex Air can refer you to partners who are familiar with the process.
How can a thermographic inspection detect duct leaks?
Infrared thermography detects temperature differences. Air leaks in ducts create abnormally hot or cold areas that are clearly visible on the thermal image.
If a ventilation duct is leaking warm air in the winter, the area around the leak will feel warmer than the rest of the wall or ceiling. If a duct is leaking air conditioning in the summer, the area will feel cooler. These temperature anomalies reveal the exact location of the leaks.
A thermographic audit also detects insulation defects around ducts. Inadequate or misplaced insulation creates thermal bridges that are visible to an infrared camera. This often explains why some rooms are harder to heat or cool than others.
At Vortex Air, we use thermal imaging during inspections of condos in high-rises and buildings with centralized systems. It is particularly useful for identifying problems in common areas where ducts are hidden behind walls and ceilings.
My union refuses to have the centralized system inspected. What can I do?
If you are a co-owner and believe that the centralized ventilation system is causing problems, you have options. First, attend the general meetings and raise the issue. Ask to see the maintenance log required by Bill 16. If the homeowners’ association cannot provide adequate documentation, that’s already a red flag.
You can propose a motion at the general meeting to have a professional inspection conducted. If other co-owners share your concerns, you’ll have a better chance of getting the motion passed.
If the homeowners’ association still refuses to take action and you have evidence of problems (health symptoms, mold, persistent odors), you can file a complaint with the RBQ. The RBQ may order an inspection and impose fines if the homeowners’ association is in violation.
As a last resort, you can consult a lawyer who specializes in condominium law. If the homeowners’ association fails to meet its obligations and this causes damage or affects your health, you may have legal recourse.
Can I do the ventilation work myself to save money?
Some simple tasks, yes. Changing the filters in your HRV, cleaning the heat exchanger, and clearing the vents—you can do those yourself by following the manufacturer’s instructions.
But for work that involves the system itself—installing or replacing HRVs, modifying ductwork, rebalancing the system, or performing electrical work—you must hire a qualified contractor. It’s not just a matter of expertise; it’s also required to comply with building codes and to maintain your warranty.
If you want to receive Rénoclimat grants, the work must be performed by a certified contractor. Doing the work yourself automatically disqualifies you from financial assistance. When a grant covers 30 % to 50 % of the costs, it’s really not worth the risk of losing it.
For condominiums, be sure to check your declaration as well. Many homeowners’ associations require that all work affecting common areas be performed by professionals who are approved and registered with the association. Making unauthorized modifications could cause problems with your insurance or when you resell your unit.
Your condo deserves clean air. You, too. Vortex Air is here to help you understand your ventilation situation and make the right decisions for your health and comfort.
We work with Montreal condo owners every day. We understand the specific challenges of downtown high-rises, suburban complexes, older buildings, and new construction. Our local expertise makes all the difference.
Contact us today : 514-214-7492 (available 24/7), vortexair.ca, or info@vortexair.ca. The initial assessment is free. We respond quickly. We give you clear answers.
Breathe better. Live better. Get started now.
