An outdoor heat pump on a flat roof: a real-world example of professional cleaning
At AirGreen , we regularly service installations located on flat roofs, where the outdoor units are exposed to dust, leaves, harsh weather, and mineral deposits. This was the case for this wall-mounted heat pump installed in Sainte-Thérèse , which our team completely cleaned and refurbished.
Initial observation: accumulation of dust and corrosive deposits
The customer contacted us after noticing that their appliance was operating less efficiently and making a slightly unusual noise when starting up. Upon visual inspection, our technician found:
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A significant accumulation of dust and debris on the condenser fins.
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Greenish traces of mineral deposits on the support slabs.
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A blocked ventilation grille and a dirty fan.
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Superficial oxidation on the metal fasteners.
These signs, common on rooftop installations, can impair air circulation, cause the compressor to overheat, and significantly reduce the system's lifespan.
Our service: complete and safe cleaning
To restore the heat pump to full efficiency, our technicians carried out a series of specific steps:
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Power off and secure the unit to ensure safe work on the roof.
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Removing the side panels to access the condensation coil.
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Low-pressure cleaning of the fins using a controlled water jet and a biodegradable cleaning product designed for HVAC systems.
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Degreasing the fan and removing deposits inside the grille.
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Antibacterial disinfection of the drainage tray to prevent any mold growth.
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Inspection of supports and tightening of fixings, often neglected but essential to avoid vibrations and noise.
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Final rinsing and complete functional check after reassembly.
Results: restored efficiency and peace of mind
After the intervention, the heat pump returned to smooth and quiet operation. The discharge temperature stabilized and the airflow improved. The customer immediately noticed that the system cooled more quickly, without straining.
Furthermore, preventative cleaning helped avoid costly repairs and extended the compressor's lifespan. We also advised the client to schedule annual maintenance , which is particularly important for installations located on flat roofs.
Why use AirGreen?
At AirGreen, we provide a complete HVAC cleaning service , combining technical expertise with adherence to environmental standards. Our services cover all of Greater Montreal — Montreal, Laval, Longueuil, the North Shore and the South Shore — with one goal: to keep your systems performing well, durable and safe.
Regular cleaning, carried out by our experts, ensures:
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Optimal air quality .
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A reduction in energy consumption .
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Prevention of major breakdowns .
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Improved durability of the HVAC system .