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Installation d’une Sharp thermopompe murale à Le Sud-Ouest (Montréal)
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Installation of a Sharp wall-mounted heat pump in Le Sud-Ouest (Montreal)

Precise comfort in a finished basement: careful installation under wooden beams and intelligent condensate management

In a duplex in the Le Sud-Ouest neighborhood, we installed a Sharp wall-mounted heat pump to stabilize the temperature of a finished basement that serves as both a workshop and a family room. The space presented structural constraints typical of Montreal buildings: exposed wood beams , white-painted concrete formwork walls, limited technical passages. Our approach was to deliver a clean, easy-to-maintain, and durable HVAC system , while ensuring quiet comfort for the occupants.

Why a wall-mounted Sharp for this project?

The Sharp wall-mounted range ( R-32 refrigerant) offers fine modulation thanks to the inverter and a very cold heating mode perfectly suited to Montreal winters. For a basement, its advantages are decisive:

  • Directional blowing that allows tempered air to be pushed towards occupied areas, avoiding the stratification typical of semi-underground rooms.

  • Low noise level on the interior side, essential when the device is located near a media space or workshop.

  • Sharp's own Plasmacluster filtration , appreciated for limiting damp odors that can be encountered in old foundations.

  • R-32 refrigerant with lower GWP than R-410A and very efficient in small capacities (9k–18k BTU), often ideal for insulated basements.

Please note: When the exact model is not required by the grant program, we recommend selection by actual room heat load (envelope, infiltration, usage). This method ensures the accuracy of the BTU capacity.

Installation details: precision under beam, aesthetics and maintenance

Inner head positioning

  • Height : below the main wooden beam , at a sufficient distance to allow the hood to be fully opened and the filters to be maintained.

  • Orientation : fins adjusted to project air along the opposite wall and break up pockets of cold air at concrete floor level.

  • Fixing : plate anchored in the concrete with mechanical anchors; laser level control to guarantee condensate flow and capping linearity.

Condensate management

  • Installation of a compact condensate pump under the unit (discreet white box), essential here since gravity outlet was not possible to the outside.

  • Transparent insulated discharge pipe , chimney hidden from view and fitted with a non-return valve , limiting the risk of odors and backflow.

  • Water test and float alarm test carried out before refrigeration commissioning.

Refrigeration and feeding route

  • Insulated copper chimney connections in the upper part of the wall, grouped in a capping painted in the same tone as the facing for a sober visual integration.

  • Drilling through the foundation wall made with sleeve and air barrier mastic to maintain the continuity of the vapor barrier.

  • Dedicated power supply with compliant circuit breaker, wiring pulled through a rigid trunking protected against the usual impacts of a workshop.

Acoustic and vibration control

  • Anti-vibration spacers between the plate and the concrete to reduce solid transmission.

  • Precise adjustment of the turbine and shutter; checking of sound levels at 1 m and 3 m in Heat and Quiet mode.

Commissioning: AirGreen method

Our certified technicians apply a standardized procedure that ensures the longevity of the equipment:

  1. Nitrogen test of flares and joints (controlled pressure) to exclude any micro-leaks.

  2. Deep vacuum draw down to ≤ 500 microns , stabilization and ascent test.

  3. R-32 charge release and superheat/subcooling control based on actual line length.

  4. Electrical checks (polarity, currents, grounding).

  5. Calibration of modes and anti-frost program adapted to basements (set temperature and fan curve).

  6. Customer training: cleaning filters , access points, testing the condensate pump , seasonal HVAC maintenance reminders.

Results obtained in the basement

  • Rapid and even temperature rise , without unpleasant drafts.

  • Controlled humidity : in gentle Dry mode, the space remains comfortable even during mild spells.

  • Quiet operation compatible with cinema/workshop use.

  • Clean aesthetics : the unit blends naturally into the whitewashed wall and the exposed beam pattern.

Grants and sizing

In Greater Montreal ( Montreal, Laval, Longueuil, North Shore, South Shore ), high-efficiency R-32 wall-mounted heat pumps may be eligible for certain assistance depending on capacity and performance . Our team:

  • assesses the thermal load of the basement (insulation, thermal bridges, infiltration);

  • recommends the most accurate BTU power (9k, 12k or 18k depending on the surface and use);

  • prepares the technical documentation and detailed invoice required by the programs;

  • provides post-installation monitoring to ensure eligibility (maintenance, clearances, photos).

Best practices for a Montreal basement

  • Condensate pump : provide a visible access point and an alarm test at each maintenance.

  • Capping : paint in the same tone as the wall for a discreet finish and protection from impacts.

  • Drillings : sleeve and seal to maintain the airtightness of the foundation wall.

  • Maintenance : Wash filters every 4–8 weeks during use; gently rinse the evaporator by a professional during annual HVAC maintenance .

  • Heating instructions : prefer a stable setting to let the inverter work at low speed, which lowers consumption.

Why AirGreen for your HVAC installation in Montreal

We understand the realities of plexes , townhouses and basements in Greater Montreal . Our promise:

  • precise sizing , no overcapacity;

  • careful execution (levels, sealing, condensate management);

  • aesthetic integration respecting the function of the places;

  • complete support : choice of heat pump, grant procedures, HVAC maintenance and after-sales service in Montreal, Laval, Longueuil, North Shore, South Shore .

Conclusion

This Sharp wall-mounted heat pump installed in Le Sud-Ouest provides the thermal stability and quietness expected of a versatile basement. Positioned under a beam , with a condensate pump and protected path , it combines efficiency , impeccable finish and ease of maintenance - exactly the approach we implement every week at AirGreen for more comfortable and energy-efficient living spaces.

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