Project context: a typical plex, high expectations
In Rosemont–La Petite-Patrie, the owner of a brick plex wanted to modernize his comfort without altering the interior. His goal: efficient supplemental heating , quiet air conditioning for the bedroom and living room, and reduced energy consumption . At AirGreen , we offer an HVAC installation that meets the constraints of Greater Montreal condominiums and optimizes the performance of Sharp brand wall-mounted heat pumps .
Why a Sharp wall-mounted heat pump here?
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Hot/cold versatility : ideal for mid-seasons and summer heat waves.
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Energy efficiency : Sharp's recent R-32 ranges offer excellent seasonal coefficients, relevant for assistance programs in Quebec.
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Silence : very low noise levels on the indoor unit side — crucial in a bedroom.
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Compact design : perfect above a window, without cutting off natural light.
Our step-by-step installation approach
Study of the locations and choice of location
We position the interior head above the window , about 2.2–2.3 m from the floor. This choice:
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promotes even air diffusion ,
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frees up useful wall space,
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allows a short route of refrigerant connections to the backyard.
Drillings and route of connections
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Discreet through-hole , made with a controlled slope for gravity drainage of condensates when the configuration allows it.
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Refrigerant lines and communication cable assembled in a simple capping on the outside, typical total run 12–15 ft to the condenser.
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Waterproofing : vapor barrier and exterior grade caulking, preventing air and moisture infiltration.
Exterior integration (Montreal backyard)
Space is limited in Rosemont's courtyards. We prioritize:
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a wall plate with clear height to facilitate snow removal,
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or a raised slab if the structure requires it,
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sufficient service length for maintenance without disturbing neighbors,
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a clearance that meets the standards for air recirculation in heating.
Power supply and protections
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Dedicated circuit sized according to the nameplate,
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Code-compliant external circuit breaker and disconnect ,
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Grounding checked, careful routing to the panel.
Commissioning and calibrations
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Deep vacuum and leak test,
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Checking pressures/temperatures in cold and hot modes,
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Setting the shutters to avoid direct blowing on the bed and reduce drafts,
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Usage tips: Auto/Heat modes, nighttime temperature management, and filter maintenance.
Result at the customer
Immediate comfort and discreet sound
The Sharp heat pump delivers consistent airflow from the sleeping area to the living area. On a daily basis, the customer benefits from:
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of rapid cooling during sunny afternoons,
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efficient heating support in the fall and spring, reducing the number of times the main system starts up,
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low noise level , compatible with teleworking and sleeping.
Preserved aesthetics
The choice above the window places the head in the most sensitive loss zone , while maintaining a clean appearance . On the exterior, the capping follows the lines of the building for a discreet effect on the brick.
AirGreen technical points and best practices
Sizing and BTUs
We size the capacity according to:
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the surface area served , the orientation of the windows and solar gains ,
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insulation (brick walls + lining), infiltration and use (bedroom vs. open area).
A 9,000 to 12,000 BTU is often sufficient for a large bedroom or a closed living room; an open area may require 15,000 to 18,000 BTU . We validate the refrigeration charge and the refrigerant top-up according to the actual length of the lines.
HVAC Maintenance
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Filters : Rinse with warm water every 4–6 weeks in summer, 8–10 weeks the rest of the year.
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Exchanger : periodic professional cleaning to maintain performance and air quality.
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Exterior clearances cleared of snow and debris.
Grants and Eligibility
Recent Sharp R-32 wall-mounted heat pumps , when they meet the performance criteria in extreme cold (≈ −25 to −30 °C) and seasonal efficiency, are often eligible for programs in effect in Quebec (e.g. Hydro-Québec/LogisVert, federal initiatives). We verify each file according to the exact reference and the associated AHRI .
What sets AirGreen apart in Montreal, Laval, Longueuil, North Shore and South Shore
Mastery of Montreal buildings
Plexes and condominiums require:
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compact paths , fixings adapted to the brick,
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condensate management without nuisance,
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respect for the management and the neighborhood.
We coordinate permits, schedules, access to the yard and common areas for a clean and quick installation.
Transparency and monitoring
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Detailed quote (model, BTU , support options, condensate pumps, capping),
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Photos of the end of the work and maintenance explanations,
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Responsive after-sales service throughout Greater Montreal .
Common Mistakes to Avoid (and How We Prevent Them)
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Undersizing capacity in an open area: we perform a simplified load calculation and validate the actual blowing range.
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Drilling without drain slope: we check the slope and offer a condensate pump if gravity is not possible.
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Condenser too low in a snowy courtyard : suitable supports and minimum clearance guaranteed.
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Lines without continuous insulation : we apply closed and sealed insulation, a guarantee of efficiency in winter.
What if it was at your place?
Whether you are in Montreal , Laval , Longueuil , on the North Shore or the South Shore , we install Sharp wall-mounted heat pumps with artisanal attention: measured performance , careful aesthetics and clear explanations. At AirGreen, we transform every Montreal building constraint into a sustainable solution .
Installation Quick Facts (Summary)
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Type : Sharp wall-mounted heat pump ( R-32 refrigerant — recent range)
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Interior location : above a window, height ~2.3 m
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Connection route : approx. 12–15 ft , gravity drain preferred
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Exterior supports : raised plate/slab, snow clearance
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Objectives : four-season comfort, silence , energy efficiency