A complete intervention to breathe new life into an outdoor unit exposed to the elements
On the rooftops of commercial buildings in Saint-Laurent , it's not uncommon to find heat pumps subjected to harsh conditions: dust, leaves, rain, temperature fluctuations, and sometimes even urban debris. At AirGreen , we recently performed a complete cleaning of an outdoor heat pump unit installed on a flat roof, typical of commercial and industrial buildings in the area.
Initial inspection and diagnosis
Upon arrival, we observed that the heat pump , installed on treated wood supports and insulated panels, showed clear signs of soiling . The heat exchanger fins were partially obstructed by dust and fine windblown deposits. Furthermore, residual moisture and air pollution formed a thin film on the unit's surface, thus reducing airflow.
The client contacted us after noticing a decrease in heating and air conditioning efficiency , a common sign of poor maintenance. During seasonal transitions, this type of problem is common: a simple, thorough cleaning can often restore up to 20% of energy efficiency .
Cleaning steps
1. Securing and cutting off the power supply
As always, our team began by disconnecting the heat pump's power supply to ensure a safe intervention. The electrical connections were visually inspected to ensure there was no corrosion or cracks in the sheathing.
2. Pre-cleaning of surfaces
Using a low-pressure water jet , we first removed surface dirt, leaves, and accumulated particles from the fins. This pre-cleaning prevents debris from penetrating deeper into the components during the next phase.
3. Application of a biodegradable cleaner
We then sprayed an environmentally friendly, non-corrosive cleaning product specifically formulated for HVAC systems using A2L type refrigerants (like the one shown on this unit's label). This type of refrigerant requires careful handling and compatible products to maintain the integrity of the refrigeration circuit.
4. Rinse and thorough cleaning
After a settling time, a precise rinse with clean water was carried out, taking care not to damage the fins. We cleaned the housing, the insulated ducts, and the mounting base , often overlooked but essential to prevent corrosion and water ingress.
5. Drainage check
Finally, we checked that the unit's drainage system was not blocked. Partially blocked drains can cause water to accumulate and even lead to internal leaks. A light flush and a slope inspection confirmed that the drainage was working perfectly.
Results after intervention
The result was immediate: the heat pump regained optimal airflow and quiet operation. Upon restarting, the static pressure difference normalized, confirming that airflow had been restored. The customer quickly noticed improved indoor comfort and a reduction in ambient noise from the outdoor unit.
Why regular maintenance is essential
An outdoor heat pump installed on a roof is constantly exposed to the elements: rain, dust, pollen, and urban pollution. Without regular maintenance, these deposits lead to:
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A loss of energy efficiency ;
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Premature wear of the compressor ;
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Risks of overheating ;
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And sometimes, costly breakdowns .
At AirGreen, we recommend a complete cleaning twice a year , in spring and autumn, to ensure the longevity and maximum performance of the system.
The AirGreen approach: expertise and rigor
Our certified technicians follow manufacturer standards and use equipment suitable for modern refrigerants such as R-32 (A2L). Each cleaning is documented, photographed, and accompanied by personalized recommendations to optimize future maintenance.
We service all types of equipment: wall-mounted heat pumps, central units, multi-zone units, cassette units, VRF units and wall-mounted air conditioners , throughout Greater Montreal, including Saint-Laurent, Laval, Longueuil, the North Shore and the South Shore .
An investment that pays off
Preventive cleaning like the one carried out in Saint-Laurent is more than just a simple wash: it extends the system's lifespan, reduces energy consumption, and improves air quality. It's an economical and ecological approach, perfectly aligned with the philosophy of AirGreen , a specialist in sustainable comfort.