A complete cleaning in the heart of a humid and vegetated environment
At AirGreen , we often work in a variety of settings—from downtown Montreal to the leafy residential areas of the South Shore. This time, our team traveled to Sainte-Julie to perform a complete cleaning of a Zephyr wall-mounted heat pump , installed on an outdoor galvanized steel bracket, right next to a wooden wall. The environment, while charming, presented several challenges typical of installations in shaded and humid areas.
Symptoms before our intervention
The customer had noticed several signs of fouling:
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A noticeable decrease in airflow inside.
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Abnormal noises coming from the outdoor unit during operation.
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A buildup of moisture on the adjacent floor, caused by a partially blocked drain .
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A slight musty smell is noticeable upon startup.
These symptoms are common when the evaporator fins and the outdoor condenser are clogged with dust, dead leaves, or plant spores carried by wind and rain.
Inspection and preparation
Before we begin, our certified technician has:
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Cut off the power supply at the source to ensure safety.
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Cleared the surrounding vegetation to allow full access to the unit.
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Checked the fixing of the metal support , which is often subject to corrosion in humid environments.
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Inspected the passage of electrical cables and the condensation pipe to ensure they were in good condition.
An initial assessment confirmed the presence of accumulated dirt on the condenser fins , as well as slowed water drainage due to organic deposits.
Steps in professional cleaning
1. Disassembly and protection
We removed the top cover and protective grilles to access the internal components. All electrical connections were protected using waterproof sheaths and plastic films.
2. Cleaning the external condenser
Using a low-pressure jet and AirGreen biodegradable cleaning product , we have:
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Removed pollen, mud and dust deposits from the fins.
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Gently straighten the bent fins to optimize airflow .
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Rinsed thoroughly to leave no corrosive residue.
3. Cleaning the drain and checking the flow
The condensation pipe was disconnected, rinsed with clean water, and then tested with a pressure flow. A slight plant obstruction was removed, restoring perfect flow .
4. Fan control
The outdoor unit's fan, often overlooked, was cleaned and checked to ensure smooth rotation. A thin layer of dust on the blades can reduce efficiency by up to 10% .
5. Final verification and testing
After complete reassembly, we carried out the following:
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A performance test in air conditioning and heating mode.
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A check of energy efficiency and noise level.
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An observation of the automatic defrost cycle .
Results after cleaning
The benefits were immediate:
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Purified and fresher air inside.
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Silent operation restored thanks to the rebalancing of the blades.
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Perfect water flow , without stagnation.
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Optimized energy efficiency , allowing for consumption savings of approximately 10 to 15%.
The customer was impressed by the visible — and especially audible — difference as soon as his Zephyr heat pump was restarted.
Why regular cleaning is essential
A wall-mounted heat pump installed in a wooded outdoor environment, like here in Sainte-Julie, is particularly exposed:
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To plant dust and organic debris .
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Constant humidity promotes mold growth.
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To insects and small debris that clog the drain.
Annual professional maintenance not only extends the life of the appliance, but also ensures constant comfort and impeccable indoor air quality .
AirGreen's expertise: safety, precision and sustainability
At AirGreen , we perform every HVAC cleaning with the same rigor:
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Use of specialized tools and environmentally friendly products.
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Full compliance with manufacturer's standards .
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Performance monitoring after intervention .
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Personalized advice to prevent future fouling (vegetation spacing, drainage checks, etc.).
Each visit is an opportunity to revitalize your system, while optimizing its durability and energy efficiency.