An outdoor heat pump regaining its efficiency after a thorough cleaning
At AirGreen , we regularly perform complete cleanings of wall-mounted heat pumps throughout the Greater Montreal area. Recently, our team traveled to Boisbriand , on the North Shore, for a thorough maintenance check of a Sharp Eco Inverter outdoor unit . Despite its high-performance design and Plasmacluster Ion air purification system, the unit was showing signs of soiling due to several seasons of operation without professional cleaning.
Symptoms observed before the procedure
The owner had noticed:
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a significant decrease in heating and air conditioning efficiency ;
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an increase in operating noise ;
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and the presence of stagnant water and dirt on the outer hood .
A visual inspection quickly confirmed an accumulation of dust, pollen, and oily residue on the condenser. The unit was also covered in traces of moisture due to excessive condensation—a typical sign of reduced airflow through the fins.
The AirGreen washing process
1. Preparation and safety
Before any work began, we disconnected the power and cordoned off the work area to prevent any splashing on the walls and the adjacent balcony. A drip tray was placed under the unit to collect the rinse water and grease residue.
2. Application of the eco-friendly cleaner
We sprayed a biodegradable detergent specifically designed for heat exchangers , which effectively dissolves oils and particles without damaging the anti-corrosion coating on the fins. The product was left to work for a few minutes to thoroughly loosen the encrusted deposits.
3. Controlled pressure rinsing
Using a low-pressure jet of fresh water , we carefully rinsed the surface of the condenser, paying particular attention to the most heavily clogged areas. This gradual rinsing removed the accumulated layers of dirt while preventing any deformation of the fins.
4. Cleaning the ducts and checking the drain
The drainage pipes were then inspected and flushed to ensure the smooth flow of condensate. This step is crucial to prevent the formation of internal mold and unpleasant odors.
5. Drying and final test
Once the unit was rinsed, we allowed the heat pump to air dry naturally. A start-up test confirmed consistent airflow, a stable temperature, and a significant reduction in noise. The exterior of the unit was wiped down and treated with a surface conditioner to extend its protection against moisture.
Result: restored performance and cleanliness
After our intervention, the client immediately noticed:
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improved energy efficiency ;
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a more stable and quieter airflow ;
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and a clean and healthy appearance of its Sharp unit.
The maintenance not only restored the device to its original efficiency, but also prevented compressor overheating caused by poor ventilation.
Why regular exterior washing is essential
An outdoor heat pump naturally accumulates debris: dust, pollution, leaves, insects, etc. This reduces its heat exchange capacity, forcing the compressor to work harder and increasing electricity consumption. Professional cleaning once or twice a year helps to:
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maintain energy performance;
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extend the lifespan of the compressor and fans;
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reduce the risk of premature failure;
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and preserve indoor air quality.
The AirGreen commitment
At AirGreen, every heat pump cleaning is performed according to a rigorous protocol that meets Sharp manufacturer standards . Our technicians use environmentally friendly products and calibrated professional equipment, ensuring that each unit is returned to optimal cleanliness and efficiency.
We offer this complete service in Montreal, Laval, Longueuil, on the North Shore and the South Shore , guaranteeing our clients lasting comfort and total peace of mind.
AirGreen – Experts in cleaning and maintaining Sharp and other brand heat pumps in Boisbriand and throughout the greater Montreal area.
Clean, efficient and sustainable systems, thanks to our HVAC expertise.