In a condo in Ville-Marie , we performed a complete cleaning of a KoolKing wall-mounted heat pump (mini-split indoor unit). The photo clearly shows the open flap and the exposed interior of the wall unit: this is a typical situation where a simple "filter rinse" is no longer sufficient. When the turbine, coil, and condensate tray begin to accumulate dust and deposits, air quality decreases, odors appear, and efficiency can drop.
At AirGreen , we approach this type of maintenance with precision: protecting the space, thoroughly cleaning critical components, securing the drain, and then putting the unit back into service with concrete checks. The result: a quieter, more stable system, and above all, significantly more pleasant indoor air.
Why professional cleaning is essential on a Kool King wall mural
A wall-mounted heat pump circulates a significant volume of air every day. Even in a spotless home, fine particles , household dust, textile fibers, and moisture eventually accumulate inside the unit. Over time, this generally leads to:
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A decrease in airflow (the device is working harder to reach the set point).
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Odors are present at startup, especially in heating or dehumidification mode.
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Poorly managed humidity can promote mold and bacteria growth in the tank or drain.
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Noisier operation (fouled turbine, imbalance, whistling).
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Less efficient performance, therefore higher consumption.
A cleaning done "properly" therefore aims for more than aesthetics: it aims for performance , durability and air quality .
Type of machine observed: wall-mounted heat pump (mini-split)
The visible format (horizontal indoor unit, motorized damper, internal turbine) corresponds to a KoolKing residential wall-mounted heat pump . In this type of configuration, the unit is generally used for:
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Air conditioning is needed in the summer.
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To heat efficiently for much of the winter.
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Dehumidify during humid periods.
Although the exact model is not legible in the photo, the overall design is consistent with a "new generation" KoolKing Inverter installed in a condo environment.
What the image tells us: useful clues for a deep clean
In the photo, we can see:
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The open aspect and access to internal components.
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The turbine area (blower wheel) visible behind the air outlet.
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A clean interior installation, typical of a contemporary residential space, where surface protection is paramount.
This type of view is common when the customer notices a drop in flow rate, a slight odor, or simply when they want a serious service before (or after) the heating season.
Our AirGreen method: complete and safe cleaning of a Kool King wall
1) Preparation and protection of the premises (essential in a condo)
In Ville-Marie, the goal is clear: floors, walls, furniture, and curtains must remain immaculate. Before altering the unit, we proceed to:
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Protection of the wall and the area under the device.
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Implementation of a recovery system (wash bag / rinse pipe) to avoid any splashing.
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Checking access to the drain and clearance around the unit.
This step is often what differentiates a true professional cleaning from a quick intervention that ends up dirtying the space.
2) Filter cleaning: necessary, but never sufficient
The filters are removed, dusted, and washed. We also check:
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Their condition (deformation, saturation, breaks).
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Their correct repositioning (a misaligned filter greatly reduces efficiency).
Yes, this step is important… but it rarely solves the odors or the lack of performance. The real “heart” of the problem often lies further down the line.
3) Cleaning the coil (evaporator) : where the air becomes saturated with moisture
The coil absorbs moisture and heat. Over time, it becomes a reservoir for microparticles. We perform the following:
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Application of a cleaning product suitable for coils (effectiveness + respect for components).
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Dislodgement of deposits between the fins, without bending them.
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Controlled rinsing and complete water recovery.
A clean coil directly improves efficiency , temperature stability, and the feeling of comfort.
4) Cleaning the turbine (blower wheel) : the step that changes everything
The turbine, visible inside, is a critical point. When it becomes clogged, the following are often observed:
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An irregular breath.
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Noise.
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A persistent odor upon startup.
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A diffusion of particles in the room.
Our approach involves methodically cleaning the turbine, removing the deposits embedded on the blades. This is a more thorough step than a "home" cleaning allows, and it often provides the greatest immediate improvement in comfort.
5) Condensation tray and drain: preventing leaks and odors
The moisture captured by the device ends up in the tray, then drains away through the drain line. We:
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Let's clean the bin.
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Let's check the actual flow (not just "in theory").
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If necessary, clear the condensate drain.
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Let's confirm that there is no repression or stagnation.
This step is essential to avoid musty odors , overflows and unwanted dripping.
6) Targeted disinfection (if relevant)
In some cases (odors, history of high humidity, heavy use), we add targeted disinfection of at-risk areas, making sure to use products compatible with residential HVAC systems.
Recommissioning and checks: do not leave without validating.
After cleaning, we restart the KoolKing wall-mounted heat pump and carry out specific checks:
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Airflow and damper stability.
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Operating noise (smoother turbine).
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Heating/cooling mode depending on the season.
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Condensate drainage (drainage test).
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Overall impression of comfort (air feels "lighter", less congested).
The goal is for the client to feel a real difference, not just the "idea" of an interview.
How often should a wall-mounted heat pump be cleaned in Montreal?
In practice (Greater Montreal), we recommend:
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Filters : regular maintenance (depending on use and the presence of animals).
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Complete professional cleaning : usually once a year , or every 12–18 months.
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More frequent if: device heavily used, dusty air, sensitive occupants, odors, or reduced performance.
In Ville-Marie, where spaces are often more compact and well insulated, air circulates a lot in the same volume: a complete cleaning really helps to maintain a constant air quality.
Conclusion: a clean Kool King means lasting comfort
This intervention in Ville-Marie perfectly illustrates what we see every week: a KoolKing wall-mounted heat pump may look "okay" from the outside, but the inside (impeller, coil, tray, and drain) often tells a different story. By performing a deep cleaning , we extend the system's lifespan, stabilize its performance, and significantly improve air quality.
At AirGreen , we perform these cleanings with a clean, safe method adapted to condos as well as houses, throughout Greater Montreal.