In an apartment in Ville-Marie , in the heart of Montreal, we performed a complete cleaning of a WindAir brand wall-mounted heat pump (mini-split) . The type of unit visible in the photo — a compact wall unit, installed high up, above a storage unit — perfectly matches the typical residential installations of condos and urban dwellings: optimized spaces, air circulation to be precisely controlled, and the need to maintain excellent indoor air quality.
Even when a unit appears "clean" to the naked eye, the interior (filters, heat exchanger, turbine, condensate tray) can accumulate fine dust, biofilm, and residual moisture. This is often where performance drops, persistent odors, and, eventually, the risk of mold growth originate.
A WindAir wall-mounted heat pump: efficient… provided it is maintained.
A WindAir wall-mounted heat pump is designed to offer a good balance between comfort and efficiency, especially in an environment like Montreal where the unit is used for both summer cooling and transitional heating (and sometimes more). However, to maintain stable airflow, prevent heat exchanger fouling, and protect internal components, regular maintenance is essential.
In this specific case, the WindAir unit installed in a living room needed to be restored to:
-
a more direct airflow (less "soft" at the outlet),
-
a reduction in odors at startup,
-
more consistent performance, particularly during prolonged cycles.
These are typically the kinds of symptoms you see when the filters are clogged and the heat exchanger starts to retain a layer of dust and moisture.
Machine type and model: what can be consistently concluded
-
Machine type: wall-mounted heat pump (mini-split indoor unit)
-
Brand: WindAir (used as the primary reference)
-
Model: not legible in the photo; therefore we treat it as a "new generation" WindAir wall-mounted heat pump (residential inverter category, standard size)
The goal is not to invent an exact reference, but to remain consistent: a wall-mounted head of this size generally corresponds to common residential capacities and inverter operation, perfectly suited to the condos of Ville-Marie.
Context of intervention in Ville-Marie: real constraints and specific approach
The layout of the venue often implies two requirements:
-
Zero damage (light walls, furniture close by, limited space).
-
Silent and rapid intervention , while still doing thorough work.
Before starting, we systematically put in place a protection:
-
tarpaulins and protective coverings on the wall and floor,
-
protection of nearby furniture
-
controlled recovery of rinsing water (to avoid any infiltration or dripping).
These are the details that make the difference between a simple "wipe with a cloth" and a professional cleaning that is truly safe for the home.
Key steps in the complete cleaning process (AirGreen method)
1) Securing and functional inspection
We begin with a quick check:
-
general condition of the wall-mounted head
-
operation of the shutters, ventilation speed, cooling/heating mode,
-
listening for abnormal noises (turbine, vibrations),
-
checking for the presence of odors at startup.
This step guides the level of cleaning required and confirms that there is no electrical or mechanical problem to address in parallel.
2) Cleaning the filters (and restoring the airflow)
The filters are removed, dusted, washed and dried properly.
It's simple, but crucial: loaded filters quickly lead to:
-
decrease in flow rate,
-
increased consumption
-
increase in retained moisture,
-
less stable feeling of comfort.
We also insist on the perfect replacement of the filters: a poorly repositioned filter allows dust to pass into the exchanger, which negates the effect of the cleaning.
3) Cleaning the heat exchanger (internal coil)
The heat exchanger (the internal “radiator”) is one of the most sensitive areas. Even without visible dirt from the front, it often contains:
-
fine dust
-
grease particles (cooking, aerosols),
-
micro-accumulations that retain moisture.
We perform a cleaning process that respects the fins and promotes:
-
optimal heat transfer
-
improved efficiency
-
a reduction of odors related to biofilm.
4) Cleaning the turbine (blower wheel)
This is the step that "speed" interviews most often neglect... and yet, it is frequently the source:
-
of odors at startup,
-
of projected dust,
-
ventilation noise,
-
performance drops even with clean filters.
When the turbine becomes overloaded, the airflow decreases, and the unit compensates by running longer. Therefore, thorough cleaning also targets the blower wheel , using a controlled method to prevent contaminants from entering the room.
5) Condensation tray and drain line: preventing leaks and mold
A wall-mounted heat pump naturally produces condensation in cooling mode (and sometimes in dehumidification mode).
We clean and check:
-
the condensation tray (biofilm, residues),
-
the flow,
-
the drain (partial obstruction, slope, evacuation).
A clogged drain can lead to:
-
water leaks on the wall,
-
persistent odors,
-
excessive internal humidity.
In a condo in Ville-Marie, this is a critical point: a leak, even a slight one, can quickly become a problem with finishing (painting, gypsum) or with the neighbors.
6) Targeted disinfection and odor neutralization
When appropriate, we apply a targeted disinfection approach (without overdoing it), in order to:
-
limit microbial growth,
-
reduce the source of odors,
-
improve indoor air quality .
The goal is not to add fragrance: it is to eliminate the cause (humidity + dust + biofilm).
7) Clean reassembly and performance testing
Once the cleaning is complete:
-
complete reassembly,
-
checking the alignment of the panels and shutters,
-
mode test
-
validation of airflow and operational stability.
We ensure that the WindAir unit restarts with normal behavior:
-
more consistent airflow
-
cleaner start-up (fewer odors),
-
faster feeling of comfort.
Expected results after a professional cleaning
After this type of intervention, the most frequent benefits are:
-
improved airflow ,
-
reduction of odors at startup,
-
improved efficiency in air conditioning mode.
-
more stable cycles (less “forcing”),
-
reduction of future accumulation (because everything starts “from scratch”).
In an urban environment like Ville-Marie (fine dust, traffic, dry air in winter), regular maintenance is a real lever for comfort.
Maintenance tips for a WindAir wall-mounted heat pump in Montreal
To keep a WindAir wall-mounted heat pump in good working order:
-
Clean/vacuum the filters regularly (depending on usage).
-
Avoid running the unit at minimum flow rate continuously if the environment is dusty.
-
Watch for warning signs: odor, shortness of breath, ventilation noise, abnormal humidity,
-
Plan for periodic complete cleaning (heat exchanger + turbine + drain), especially if the unit operates for a long time during the summer.
Why entrust your cleaning to AirGreen?
At AirGreen, our approach is simple: a cleaning must be thorough , complete , and tailored to the realities of Greater Montreal homes. In Ville-Marie, every detail counts: protecting surfaces, controlling the water, treating internal areas (not just the filters), and putting the unit back into service with a serious check.
We operate with a field-based approach: improving performance, reducing risks (odors, humidity, leaks), and extending the lifespan of your equipment.