Do you have a wall-mounted unit in your home in Montreal? You’re not alone. Installations of wall-mounted air conditioners have increased by 20 % in the region since 2022. They’ve become the preferred choice for Montrealers looking to keep their homes comfortable year-round.
But here’s what many homeowners don’t realize: these units require regular maintenance. Not just once in a while. We’re talking about a thorough cleaning several times a year if you want them to work efficiently and keep the air you breathe healthy.
Montreal’s climate is particularly hard on wall-mounted units. Our cold, snowy winters, humid summers, and extreme temperature fluctuations—all of these put a strain on your units. A poorly maintained unit can develop mold, lose up to 25 % of its energy efficiency, and even break down at the worst possible moment.
At Vortex Air, we clean wall-mounted units in Montreal for over 10 years. We’ve seen nearly new appliances that were completely caked with grime. We’ve seen owners spend thousands of dollars on repairs that could have been avoided with regular maintenance. This guide shows you how to take care of your investment.
Need a complete maintenance check before winter? Contact Vortex Air for a free inspection — We show you exactly what condition your unit is in.
Why Cleaning a Wall-Mounted Unit Is Essential in Montreal
Your wall-mounted unit circulates air throughout your home all year round. It draws in air, filters it, heats or cools it, and then returns it to your rooms. If the unit is dirty, you’ll be circulating dust, allergens, mold, and bacteria throughout your home.
Indoor air quality is a serious matter. Health Canada estimates that Canadians spend about 90 % of their time indoors. The air you breathe at home directly affects your health, especially that of children, seniors, and people with respiratory problems.
In Montreal, humidity is a constant enemy. In the summer, humidity levels can easily exceed 70 %. In the winter, when we heat our homes, the air becomes very dry, but condensation builds up inside appliances. This combination creates the perfect conditions for mold.
Decree 991-2025 of the Régie du bâtiment du Québec (RBQ) now requires condominium owners to maintain a maintenance log for all heating and air conditioning systems. This sends a clear message: maintaining your HVAC systems is more than just a recommendation—it’s a requirement.
Neglecting maintenance is costly. Your electricity bills go up because the unit has to work harder to compensate for the buildup of dirt and grime. The lifespan of your unit is reduced—instead of 15 years, you might only get 8 or 10. And when it breaks down, repairs can cost between 2,000 $ and 5,000 $.
The Risks of a Poorly Maintained Wall-Mounted Unit
According to data from AirGreen, approximately 70 % of Quebec homeowners neglect to clean their filters regularly. This simple oversight increases the risk of mold growth in the unit by 30 %.
Mold isn't just a cosmetic problem. It releases spores into the air you breathe. These spores can cause allergies, asthma, eye and throat irritation, headaches, and, in severe cases, respiratory infections.
Odors are often the first sign. That musty or stale smell when you turn on your unit? It’s probably mold that has grown in the coil or condensate pan. The smell comes from spores spreading throughout your home.
Volatile organic compounds (VOCs) also accumulate in dirty systems. Dust, dirt, and cleaning product residue—all of these can release VOCs when hot air passes through them. You’re exposed to these pollutants every time you use your appliance.
Air conditioning breakdowns often happen at the worst possible time—in the middle of a July heat wave or during a January cold snap. A dirty unit has to work harder all the time, which causes premature wear and tear on its components. The compressor is the most expensive part to replace, and it’s often the first to fail when the unit isn’t properly maintained.
Excessive energy consumption is a matter of simple math. A clogged filter reduces airflow by 30 % to 50 %. The unit has to run longer to reach the desired temperature. Your Hydro-Québec bills are going up, and you don’t understand why.
The Practical Benefits of Regular Cleaning
Regular cleaning of your wall-mounted unit can reduce your energy consumption by 15 % to 25 %. For a typical home in Montreal that uses its wall-mounted heat pump in both summer and winter, this translates to savings of 200 $ to 400 $ per year. Cleaning pays for itself.
The lifespan of your unit increases significantly. A well-maintained unit can easily last 15 to 18 years. A neglected unit begins to show signs of wear and tear after 8 to 10 years. When you’re looking at an investment of 3,000 $ to 5,000 $ per installed unit, maintenance quickly pays for itself.
Comfort is another benefit that is often underestimated. A clean unit distributes air evenly, maintains a stable temperature, and operates quietly. A dirty unit is noisy, creates hot or cold spots, and emits unpleasant odors.
Indoor air quality improves dramatically after a professional cleaning. Tests show that levels of fine particles and VOCs can decrease by 50 % or more. You breathe healthier air, sleep better, and experience fewer allergy symptoms.
The LogisVert 2025 grants now offer up to 650 $ per unit for the maintenance and optimization of wall-mounted heat pumps. This is substantial financial assistance that makes professional cleaning even more affordable. Many Montreal homeowners are unaware of these programs and are missing out on free money.
Check your eligibility for the LogisVert 2025 grant with Vortex Air — We'll help you navigate the process and maximize your savings.
Steps for Cleaning a Wall-Mounted Unit Yourself (Safety Guide)
Want to clean your wall-mounted unit yourself? You can do basic maintenance, but you need to follow the right steps and know your limits. Some tasks require the expertise of a professional.
First important point: the myth that vacuuming the grates is enough. That’s completely false. A vacuum cleaner only removes surface dust. The dirt that really affects your unit’s performance is found in the coil, the fan, and the condensate pan. A vacuum cleaner can’t reach these components.
The tools you'll need for basic cleaning: a screwdriver (usually a Phillips-head), a vacuum cleaner with a brush attachment, a spray bottle, lukewarm water, mild soap (such as dish soap), a microfiber cloth, a soft-bristled brush, and plenty of patience.
The most important safety warning: wall-mounted units operate on 240 volts. That’s twice the voltage of standard outlets. An electric shock can be fatal. The RBQ recommends always turning off the power at the electrical panel before performing any maintenance. Don’t just turn off the unit with the remote control—turn off the circuit breaker.
When is the best time to clean it? In the spring, before you start using it for air conditioning, and in the fall, before the heating season begins. If you use your unit heavily, cleaning it every three months is recommended.
Preparation Before Cleaning
Before working on your unit, turn off the circuit breaker that powers it in the electrical panel. Wait at least 15 minutes before beginning. This allows the capacitors to discharge completely. These components can retain an electrical charge even after the unit has been turned off.
Protect your floor and furniture. Lay out towels or a drop cloth underneath and around the unit. Cleaning can cause water to drip and dislodge dirt. This is especially important if you have hardwood floors or carpet.
Remove the front panel from your unit. Most simply lift off, but some models have clips or screws. Check your unit's manual if you're not sure. Take a photo before disassembling anything—it will help you put it back together.
Visually inspect the interior before you begin. Do you see any visible mold (black or green spots)? Significant buildup of dirt? Standing water in the tray? These signs may indicate that you should call in a professional rather than attempting a basic cleaning.
In Montreal’s humid climate, electricity and water don’t mix. Make sure your hands are dry. Never use a garden hose or pressure washer on internal components. Pressurized water can damage the electronics and force water into places where it shouldn’t go.
Cleaning the Filter
The filter is the easiest and most important part to clean. Most wall-mounted units have washable, reusable filters. You should clean them at least every two or three months, or more often if you have pets or if anyone smokes in the house.
Carefully remove the filter. It is usually located behind the front panel and is often held in place by simple clips. Be careful not to tear it—these filters are made of plastic mesh that can crack if it is old or handled roughly.
Take the filter to the sink or bathtub. Rinse it with lukewarm (not hot) water to remove surface dust. You'll be surprised at how much dirt comes off, even if the filter looks relatively clean.
Prepare a solution of lukewarm water with a few drops of mild dish soap. No harsh detergents, no bleach, no strong chemicals. These products can damage the filter material and leave behind residues that will then circulate in your air.
Let the filter soak in the soapy solution for 10 to 15 minutes. Gently scrub it with your hands or a soft-bristled brush to remove any caked-on dirt. Rinse thoroughly until the water runs clear and there is no soap left.
Drying is crucial. Let the filter dry completely—at least 24 hours—before putting it back in place. A damp filter installed in your unit will promote mold growth. Place it in a well-ventilated area, ideally near an open window or in front of a fan.
Studies show that a clean filter can reduce VOC levels in your home by 50 % or more. It’s a simple step that has a major impact on your indoor air quality.
Cleaning the Coil and Indoor Unit
The coil (also called the evaporator) is the series of finned metal tubes you see behind the filter. That’s where the magic happens—air passes through these fins and is cooled or heated. It’s also where dirt and mold tend to accumulate.
To clean the coil, use a solution of warm water and mild soap in a spray bottle. Lightly spray the fins. Don't use too much water—you want to dampen them, not soak them. The water will drain into the condensate pan below, but too much water can cause damage.
Use a soft-bristled brush to gently clean between the fins. Brush in the direction of the fins, never perpendicular to them. The fins are fragile and bend easily. Bent fins reduce airflow and the efficiency of your unit.
Some people recommend a solution of diluted white vinegar (one part vinegar to three parts water) as a natural disinfectant. AirGreen mentions this method in its maintenance guides. Vinegar kills mold and bacteria without leaving any harmful chemical residues.
Avoid harsh commercial cleaning products unless they are specifically designed for air conditioning coils. Many household products can corrode the aluminum or copper in the coils, especially in Montreal’s typically humid climate.
The fan (the impeller that blows air) also deserves attention. Wipe the blades with a damp microfiber cloth. Dust buildup on the blades causes the fan to become unbalanced, creates noise, and reduces efficiency. But be careful: these blades spin at high speeds, so any imbalance can damage the motor.
The condensate pan is located at the very bottom of the indoor unit. This is where water collects when your air conditioner is running. If the pan is dirty or the drain is clogged, water will pool and mold will grow. Clean it with the same soap-and-water solution, and make sure the drain is clear.
External Inspection and De-icing
The outdoor unit (the compressor) is often located on a balcony, an exterior wall, or on the ground. It also needs attention, especially after a Montreal winter, when it can be covered in snow and ice for months.
In the spring, inspect the outdoor unit for winter damage. Look for dents, corrosion, and exposed wires. Snow that accumulates and becomes compacted can damage the outdoor fins. If you see significant damage, call a professional before turning on the unit.
Remove any debris around the outdoor unit. Fallen leaves, branches, dust—all of these can accumulate and block airflow. Your unit needs at least 60 cm of clear space all around it to operate efficiently.
Gently clean the outer fins with a low-pressure garden hose. Spray from the inside out to dislodge the dirt. Never use a high-pressure washer—it can bend the fins and damage the internal components.
Defrosting in the winter is important if you use your heat pump for heating. Modern units have automatic defrost cycles, but sometimes ice still builds up. If you see a thick layer of ice on the outdoor unit, let the unit run through its automatic defrost cycle. Never try to break the ice manually—you could damage the coil or the fan blades.
In condos in the Plateau or Ahuntsic, where outdoor units are often located on balconies, make sure that condensation can drain freely. In winter, this water can freeze and create dangerous patches of ice.
When to call in a professional
Basic cleaning that you can do yourself is fine for regular maintenance. But there are limits to what you should attempt. According to a 2025 survey by Protégez-Vous, about 40 % of Quebec homeowners switch to a professional service after five years of cleaning their homes themselves.
You should call a professional if you see extensive mold (more than just a few small spots). Mold can hide deep inside the appliance, and removing it properly requires specialized tools and professional-grade antimicrobial products.
If your unit is making unusual noises (squeaking, rattling, whistling), it’s often a sign that something is out of balance or worn out. A technician can diagnose the problem before it turns into a costly breakdown.
Water leaks are another warning sign. A little condensation is normal, but if your unit is constantly leaking, the drain may be clogged, or there may be a problem with the condensate pan. These repairs often require tools and expertise that you don't have at home.
Persistent odors that return even after cleaning often indicate deeply embedded mold or parts that need to be replaced. A professional can completely disassemble the appliance and perform a deep clean that you cannot do yourself.
INVC-certified technicians (such as those at Vortex Air) and NADCA-certified technicians follow strict protocols. They use specialized tools, including steam cleaners, rotary brushes, HEPA vacuums, and professional-grade antimicrobial products. They can also test refrigerant pressure, inspect electrical components, and detect emerging problems.
Myths and Common Mistakes About Cleaning Wall-Mounted Units
There’s a lot of misinformation out there about maintaining wall-mounted units. Let’s debunk the most common myths to help you avoid costly mistakes.
Myth #1: Cleaning once in the summer is enough to last the whole year.
The reality: Your unit needs maintenance at least twice a year—in the spring before the air-conditioning season, and in the fall before the heating season. If you use it heavily, every three months is even better.
Myth #2: I can clean my unit with any household cleaner.
The reality: Harsh chemicals can corrode metal components, damage plastics, and leave toxic residues that will circulate in your air. Use only mild products or solutions specifically designed for HVAC systems.
Myth #3: The more pressure I apply, the more thoroughly I clean.
The reality: High-pressure washers and powerful water jets can bend delicate fins, force water into the electronics, and cause damage that costs hundreds of dollars to repair. Gentleness is key.
Myth #4: My unit is brand new; it doesn't need to be cleaned.
The reality: Even new units collect dust and can develop mold, especially in Montreal’s humid climate. Preventive maintenance from the start extends the life of your investment.
Is a summer cleaning enough to get you through the winter?
No, absolutely not. Le Journal de Montréal published an article in May 2025 about this persistent myth. Montreal winters are particularly hard on wall-mounted heat pumps operating in heating mode.
Snow and moisture create the perfect conditions for the growth of a biofilm—a slimy layer of bacteria and microorganisms that adheres to the interior surfaces of your unit. This biofilm grows slowly during the winter and proliferates in the spring as temperatures rise.
If you only clean your unit in the summer and use it for heating in the winter, you’re letting six months’ worth of dirt build up before the next cleaning. The internal components get dirty, the filters get clogged, efficiency drops, and your Hydro bill goes up.
The freeze-thaw cycle that your outdoor units go through during the winter can cause ice buildup that blocks the condensate drains. In the spring, when everything thaws, this water needs to be able to drain away. If the drains are blocked, you’ll end up with water overflowing into your home.
Complete DIY project requiring no specialized tools
Many homeowners think they can do a thorough cleaning without professional equipment. This is a mistake that can end up being very costly.
Compressors operate at high pressure. If you work on refrigerant lines without knowing what you’re doing, you risk costly leaks, damage to the system, and even injury. Pressurized refrigerant can cause cold burns.
The electrical components inside your unit require specialized knowledge. Touching the wrong wires or causing a short circuit can burn out your control board—a repair that can easily cost between 500 $ and 800 $.
Professional technicians detect approximately 60 % hidden defects that homeowners overlook during a home cleaning. Worn bearings, minor refrigerant leaks, loose electrical connections, weak capacitors—these problems worsen over time and cause major breakdowns if not corrected.
Specialized equipment makes a real difference. Professional steam cleaners kill mold and bacteria without chemicals. HEPA vacuums capture 99.97% of particles so they aren’t spread throughout your home. Inspection cameras allow us to see deep inside ducts and components.
How much does it cost to have a wall-mounted unit cleaned in Montreal?
Let's talk frankly about money. Professional Cleaning of a Wall-Mounted Unit in Montreal typically costs between 300 $ and 600 $ per unit. The price varies depending on the size of the device, its condition, and the scope of service.
This price may seem high if you’ve never had your unit cleaned before. But let’s compare it to the alternatives. If you neglect maintenance and your compressor breaks down, replacement costs between 2,000 $ and 3,500 $. If you have to replace the entire unit, it will cost between 3,000 $ and 5,000 $, including installation.
Emergency repairs during a heat wave or in the middle of winter cost more. Technicians charge emergency rates, and you don't have the luxury of shopping around or negotiating when your home is 35 °C or 10 °C.
Do-it-yourself cleaning is free if you don't count your time and the cleaning supplies, but it only covers the basics. You can clean the filter and accessible surfaces, but you'll never be able to clean the indoor coil, the fan thoroughly, or the electrical components.
The true value of professional service isn't just the cleaning. It's the thorough inspection, the detection of emerging issues, the adjustments and calibrations, the detailed report, and the peace of mind that comes from knowing your device is performing at its best.
Comparison: Cleaning at Home vs. Professional Cleaning
Here is a table that clearly compares the two options:
House Cleaning:
- Cost: 0 $ – 50 $ (products and tools)
- Time: 2–4 hours (depending on experience)
- Risks: Damage to the device, failure to detect problems, exposure to mold
- Warranty: None
- Depth: Superficial (filters, grates, visible surfaces)
Professional cleaning :
- Cost: 300 $ – 600 $ per unit
- Time: 1–2 hours (for you: none—the technician does everything)
- Risks: Minimum requirements; trained and insured technicians
- Warranty: Yes, for service and parts, if necessary
- Depth: Complete (disassembly, thorough cleaning, inspection, adjustments)
At Vortex Air, professional service goes far beyond a simple cleaning. Mohamed and Omar ensure that every technician follows a rigorous protocol. You’ll receive a detailed report with before-and-after photos, personalized recommendations, and maintenance tips tailored to your situation.
LogisVert grants can cover up to 650 $ for the maintenance and optimization of your wall-mounted heat pumps. This significantly reduces your net cost. If you have two or three units in your home, the grants can cover almost the entire cost of service for one unit.
What a Professional Service Includes (e.g., Vortex Air)
When you call Vortex Air to have your wall-mounted units cleaned, here’s exactly what happens. We always start with a free inspection. A technician will come to assess the condition of your units, identify any potential problems, and provide you with a clear quote before starting any work.
The comprehensive visual inspection examines both the indoor and outdoor units. We look for signs of mold, leaks, damage, and corrosion. We document everything with photos. You see exactly what we see.
INVC-certified cleaning follows strict protocols. We remove the panels and any accessible components. We thoroughly clean the filter or replace it if necessary. We clean the coil using professional-grade products that kill mold without damaging the metal parts.
The fan is disassembled and thoroughly cleaned. All accumulated dust and debris are removed. The bearings are inspected for signs of premature wear. A clean, well-oiled fan operates quietly and efficiently.
The condensation pan and drain are cleaned and disinfected. We make sure that water can drain freely. A clogged drain causes leaks and promotes mold growth.
The outdoor unit also gets attention. We clean the fins, remove debris, and check that the fan spins freely. We inspect the electrical connections and refrigerant lines to identify potential problems.
Performance tests verify that your unit is operating at its optimal capacity. We measure the outlet air temperature, check the refrigerant pressures if necessary, and ensure that the settings are correct.
The Indoor Air Quality (IAQ) report documents the condition of your system. We show you before-and-after photos. We explain what we found, what we corrected, and what might require attention in the future. Everything is in French, clear, and free of unnecessary technical jargon.
Personalized recommendations take your specific situation into account. If you have pets, we suggest cleaning the filters more often. If you use your unit extensively, we recommend maintenance every three months. If we detect a developing problem, we’ll explain your options and the associated costs.
Request your free quote from Vortex Air — 7-day-a-week service in Montreal — We respond quickly and give you an accurate update on the status of your units.
Maintenance and Prevention: How to Keep Your Unit Running Efficiently All Year Round
Professional cleaning twice a year is the foundation. But between those cleanings, there are simple steps you can take to extend the life of your unit and keep the air healthy.
The recommended maintenance frequency depends on how you use your unit. If you use your wall-mounted unit only for cooling in the summer, cleaning the filter every two or three months is sufficient. If you use it year-round for both heating and cooling, it’s best to clean it every four to six weeks.
Controlling VOCs in your home also helps keep your unit clean. Use eco-friendly cleaning products. Avoid synthetic air fresheners and scented candles, which release volatile organic compounds. Be sure to ventilate well after painting or using chemicals.
Monitoring humidity is crucial in Montreal. Keep the relative humidity between 30 % and 50 %. Too much humidity promotes mold growth. Too little causes discomfort and static electricity. A simple hygrometer costs between 15 $ and 30 $ and provides an accurate reading.
AI air quality monitoring kits are set to emerge in 2025. These smart devices connect to your phone and monitor air quality in real time. Some can even alert you when it’s time to clean your filter or when indoor pollution levels rise.
A Simple Monthly Cleaning Routine
Here's a checklist you can follow every month to keep your unit healthy. It takes 10 to 15 minutes and makes a real difference.
Week 1 of each month:
- Visually inspect your indoor unit. Check for visible dust, unusual stains, or signs of a leak.
- Clean the grates with a damp microfiber cloth. Remove any surface dust.
- Make sure nothing is blocking the air vents. Keep curtains, furniture, and decorations away from them.
Every 2 months:
- Remove and thoroughly clean the filter. Wash it, let it dry for 24 hours, and then put it back in place.
- Wipe the inside of the front panel with a damp cloth.
- Inspect the outdoor unit. Remove any leaves, twigs, or debris around it.
Every 3 months:
- Check the condensation tray for standing water or odors.
- Check to make sure your unit is working properly in both heating and cooling modes.
- Make a note of any unusual noises, persistent odors, or drops in performance.
The target for indoor air quality is to keep CO2 levels below 1,000 ppm. If you have an air quality sensor, keep an eye on this number. High levels indicate that your ventilation is insufficient, even if your wall-mounted unit is clean.
Seasonal Inspections (Spring/Winter)
In the spring, before you start using your air conditioning unit, give it a thorough checkup. This is the perfect time for a professional cleaning if you didn't have one done in the fall.
Test your unit in cooling mode for an hour, even if it’s not hot yet. Make sure it’s blowing cool air, reaching the set temperature, and running without any unusual noises. It’s better to discover a problem in April than in July during a heat wave.
Inspect the outdoor unit after winter. Snow and ice may have caused damage. Check that the fins are not bent, that the fan spins freely, and that there is no visible corrosion.
Clean around the outdoor unit. Remove anything that has accumulated over the winter. Trim any branches growing too close. Make sure rainwater can drain away without pooling around the unit.
In the fall, before you start heating, repeat the same process. Test the heating mode. Check that the warm air is coming out evenly. Listen for any unusual noises that might indicate worn bearings or an unbalanced fan.
Decree 991-2025 now requires condominium owners to maintain a maintenance log documenting all work performed on heating and air conditioning systems. Even if you live in a single-family home, keeping your own maintenance records is a good practice. It helps when you sell your home and protects you if you need to file an insurance claim.
When to Replace Your Wall-Mounted Unit
Even with perfect maintenance, your wall-mounted unit will eventually reach the end of its useful life. The typical lifespan a wall-mounted heat pump A well-maintained unit has a lifespan of 15 to 18 years. A neglected unit may fail after 8 to 10 years.
Signs that it's time to consider replacement: Your unit is 10 years old or older and requires frequent repairs. Every summer or winter, something breaks. If annual repair costs exceed 30 % of the cost of a new unit, replacement becomes more cost-effective.
A loss of efficiency is another indicator. If your electricity bills have increased significantly without any change in your usage, your unit is likely working harder than it should. It’s consuming more energy to provide less comfort.
Constant noises that get worse over time often indicate that internal components are worn out. In some cases, replacing a compressor costs almost as much as a new unit.
If your unit is unable to maintain the desired temperature—even after cleaning and maintenance—it may be a sign that it is no longer functioning properly. New units are also much more energy-efficient than models from 10 or 15 years ago.
The replacement subsidies in 2025 are generous. The LogisVert program offers substantial financial assistance to replace outdated units with newer, ENERGY STAR-certified models. Some homeowners receive between 1,500 $ and 3,000 $ per unit replaced.
Hydro-Québec also offers rebates for energy-efficient heat pumps. These combined programs can cover 30 % to 40 % of the total cost of your replacement project.
Need a comprehensive assessment? Vortex Air's experts travel throughout the Greater Montreal — We'll tell you honestly whether your unit can be repaired or if replacement is the best option.
Why Choose Vortex Air Ventilation for the Maintenance of Your Wall-Mounted Unit
There are several companies that clean wall-mounted units in Montreal. Why choose Vortex Air? Let us explain what sets us apart.
Our certifications are genuine and verifiable. Our team is certified by the INVC (National Institute of Ventilation and Air Conditioning), and we are in the process of obtaining our NADCA (National Air Duct Cleaners Association) certification. These certifications ensure that our technicians follow industry best practices.
Transparency is our hallmark. We provide you with a free, detailed estimate before starting any work. No hidden fees, no surprises. If we find any additional issues during the service, we’ll call you to discuss your options before doing anything.
No high-pressure sales. We’ll give you the straight facts about the condition of your units. If they’re working properly and just need a basic cleaning, we’ll let you know. If we think a replacement would be more cost-effective in the long run, we’ll explain why—but the decision is yours.
The trust of more than 500 satisfied customers in Montreal speaks for itself. We’ve cleaned wall-mounted units in single-family homes on the Plateau, downtown condos, duplexes in Ahuntsic, and homes in Brossard and Laval. This diverse experience allows us to quickly understand your situation.
Our local presence makes all the difference. We’re based on Boulevard de l’Acadie in Montreal. We’re familiar with the specific challenges posed by Montreal’s climate. We understand the issues facing older buildings in Rosemont and the modern systems in Griffintown.
Mohamed and Omar, the co-owners, are actively involved in the company. They oversee major projects, personally address complex issues, and ensure that every client receives exceptional service. This human and personal approach is rare in the industry.
We serve the entire Greater Montreal area—Montreal, Laval, Longueuil, the North Shore, and the South Shore. We’re open seven days a week, from 7 a.m. to 9 p.m. Do you have a busy schedule? We’ll work around it. Are you only available on Sunday mornings? We’re here for you.
The transparent audits we provide include before-and-after photos, detailed measurements, and clear explanations. You’ll understand exactly what we did and why. If we recommend additional work, we’ll explain the consequences of delaying that work so you can make an informed decision.
The areas we serve include all of Montreal’s neighborhoods: Plateau-Mont-Royal, Rosemont, Ahuntsic, Villeray, Côte-des-Neiges, Notre-Dame-de-Grâce, Verdun, LaSalle, downtown, Old Montreal, and more. On the North Shore: Laval, Blainville, Terrebonne. On the South Shore: Longueuil, Brossard, Saint-Lambert, Boucherville.
Call us at 514-214-7492 or schedule your free inspection today! We provide you with an honest assessment and solutions tailored to your budget.
FAQ – Wall-Mounted Unit Cleaning in Montreal (2025)
How often should a wall-mounted unit be cleaned?
The filter should be cleaned at least every two to three months. If you have pets, allergies, or use your unit extensively, it’s best to clean it every four to six weeks. A thorough professional cleaning twice a year—in the spring and fall—is recommended to maintain optimal efficiency and prevent problems.
If you use your wall-mounted heat pump year-round for heating and cooling, regular maintenance becomes even more important. The unit runs constantly and accumulates more dirt than one used only in the summer.
Can I use a vacuum cleaner on the coil?
Yes, but be very careful. Use a vacuum cleaner with a soft brush attachment set to the lowest setting. Vacuum gently in the direction of the fins, never perpendicular to them. The coil fins are extremely fragile and bend easily.
A vacuum cleaner can remove surface dust, but it can’t reach the dirt deeply embedded between the fins or the mold that grows in damp conditions. For truly effective cleaning, professional technicians use steam cleaners and specialized products that dissolve dirt without damaging the metal parts.
Never use an industrial vacuum cleaner or a workshop vacuum cleaner with high suction power. You will bend the fins and seriously reduce the efficiency of your unit.
How can you prevent musty odors?
Musty odors are almost always caused by mold growing in damp areas of your unit. To prevent this, make sure the condensate pan and drain are clean and that water is draining freely.
Run your unit in fan-only mode (without heating or cooling) for 30 minutes after each period of heavy use. This dries out the inside of the unit and reduces moisture, which promotes mold growth.
Clean the filter regularly. A dirty filter traps moisture and creates the perfect environment for mold. If odors persist even after cleaning, you likely have deeply embedded mold that requires professional cleaning.
In Montreal’s humid climate—especially in the summer—controlling the humidity in your home can also help. A dehumidifier in the basement can reduce overall humidity and take some of the strain off your wall-mounted unit.
When is the best time of year for maintenance?
The two best times are in the spring (March–April), before you start using the air conditioner, and in the fall (September–October), before the heating season begins. These times ensure that your unit is ready when you need it.
Spring is especially important if you've been using your heat pump for heating all winter. The unit has likely accumulated dirt and may have developed mold during the cold, damp months.
Don't wait until the first heat wave in July to have your unit serviced. HVAC service companies are swamped during periods of extreme heat. You'll have to wait several days or even weeks for an appointment, and you'll suffer from the heat in the meantime.
Do LogisVert grants cover cleaning?
Yes, the LogisVert 2025 program offers grants of up to 650 $ per unit for the maintenance and optimization of wall-mounted heat pumps. These grants cover professional cleaning, performance adjustments, and certain minor repairs.
To be eligible, the service must be performed by a qualified contractor such as Vortex Air. You must also provide proof of regular maintenance. The program aims to encourage homeowners to maintain their appliances rather than letting them deteriorate to the point where they need to be replaced.
The process is relatively simple. In most cases, your contractor submits the application on your behalf. You receive the grant directly, or it is deducted from your bill. Vortex Air helps you navigate the process and ensures that you receive the maximum amount of assistance available.
What are the signs that you need professional cleaning?
There are several signs that indicate it’s time to call a professional rather than trying to clean it yourself. Persistent odors that return quickly after cleaning the filter suggest deeply embedded mold.
If your unit is making unusual noises—whistling, squeaking, rattling, or vibrating—something is out of balance or worn out. A technician can diagnose and fix the problem before it causes a breakdown.
Water leaks are always a cause for concern. A little condensation is normal, but water that drips regularly indicates a clogged drain or a damaged condensation tray.
A noticeable drop in performance—the unit takes longer to cool or heat, takes longer to reach the desired temperature, or your electricity bills have gone up—suggests that the unit is clogged with dirt or that there is a mechanical problem.
If you see visible mold inside your unit (black, green, or white spots), call a professional. Mold can be hazardous to your health and requires proper treatment.
What should you do if the unit is leaking water?
Water leaks are a common problem but require immediate attention. First, turn off the unit to prevent more water from accumulating. Wipe up the water to prevent damage to the floor or walls.
The most common cause is a clogged condensate drain. In cooling mode, your unit produces a lot of condensation that must be drained away. If this drain is clogged with dirt, algae, or debris, water will overflow from the pan.
You can try to unclog the drain yourself by pouring hot water mixed with a little vinegar into the condensation tray. If the water doesn't drain freely, the clog is likely deeper and requires the assistance of a technician.
The condensate pan itself may be cracked or damaged, especially in older units. This requires professional replacement. Sometimes, the unit is simply not installed level, which prevents water from draining properly.
If your unit leaks frequently even after cleaning, call Vortex Air for a thorough diagnosis. We'll identify the exact cause and provide you with repair options.
Does cleaning improve indoor air quality?
Absolutely. Professional cleaning of a wall-mounted unit can dramatically improve the air quality in your home. Tests show that levels of PM2.5 fine particulate matter can decrease by 40 % to 60 % after a thorough cleaning.
VOCs (volatile organic compounds) also decrease significantly when you remove the dirt and mold that release these pollutants. A clean filter captures dust, pollen, pet dander, and other allergens more effectively.
The number of mold spores in the air drops dramatically when you clean and disinfect your unit. This is especially important for people who suffer from allergies, asthma, or other respiratory problems.
Air also circulates better in a clean unit, which helps dilute indoor pollutants and maintain a consistent temperature throughout all rooms. You breathe fresher, healthier air, and feel better in your own home.
Which products should you avoid?
Never use bleach on the metal parts of your unit. Bleach corrodes aluminum and copper, can damage plastics, and leaves behind residues that will then circulate in the air.
Harsh all-purpose cleaners, such as industrial degreasers, are too strong. They can damage surfaces and leave chemical residues. Ammonia-based products should also be avoided.
Never use a pressure washer or garden hose at full power on internal components. The pressure can bend the fins, force water into the electronics, and cause costly damage.
Scented products and air fresheners don't solve problems—they just mask odors. If your unit smells bad, you need to clean the source of the problem, not just cover up the smell with a scent.
Instead, use mild solutions: warm water with mild dish soap, diluted white vinegar (1 part vinegar to 3 parts water), or cleaners specifically designed for HVAC systems. These products clean effectively without damaging your equipment.
How much does an inspection at Vortex Air cost?
The initial inspection is completely free and comes with no obligation. A certified technician will visit your home, inspect your wall-mounted units, assess their condition, and provide you with a detailed quote for the recommended service.
If you decide to proceed with the cleaning, the typical cost ranges from 300 $ to 600 $ per unit, depending on its size and condition. This price includes a complete cleaning, inspection of components, any necessary adjustments, and a detailed report with photos.
For homes with multiple units, we offer preferential rates. If you have three or more units, we can reduce the unit cost by 10 % to 15 %. It’s a good idea to have all your units cleaned at the same time.
LogisVert grants can cover up to 650 $ per unit, which significantly reduces your net cost. We help you submit your application and ensure that you receive the maximum amount of assistance available.
There are never any hidden fees at Vortex Air. The price we give you in the quote is the price you pay. If we discover any additional issues during the service, we’ll call you to discuss them before doing anything else.
Your home deserves clean air. Your family, too. Vortex Air is here to help you keep your wall-mounted units in good working order and enjoy high-quality air all year round.
We have been working with Montreal families for over 10 years. We understand the challenges of the local climate, the unique features of different wall-mounted unit models, and the specific needs of each neighborhood.
Call us at 514-214-7492 (available 24 hours a day, 7 days a week), visit vortexair.ca, or write to info@vortexair.ca. The inspection is free. We’ll come out quickly. We’ll give you clear and honest answers.
Breathe easier. Save on your bills. Protect your investment. Get started now with Vortex Air.
