A discreet and efficient system for a HoMa plex: installation on brackets, neat finish and four-season comfort
At AirGreen , we are working in an urban plex in the Mercier–Hochelaga-Maisonneuve sector. The owners wanted a compact , quiet , and economical solution to air condition the main living area in the summer and provide supplemental heating in the off-season. The site has typical features of Montreal's inner city : brick facade , metal balconies , close pedestrian traffic, and a condominium where visual integration is as important as performance.
We are choosing a Sharp Eco Inverter , a recent wall-mounted heat pump with R-32 refrigerant , known for its fine modulation and Plasmacluster Ion filtration for indoor air quality.
What we install, and why it works at HoMa
The advantages of the Sharp Eco Inverter range
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Inverter compressor : continuous modulation to maintain the setpoint, limit ON/OFF cycles and optimize seasonal efficiency (SEER2/HSPF2) .
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Air Quality : Plasmacluster Ion technology helps reduce particles and odors in living areas.
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Controlled acoustics : exterior blowing and low-noise interior unit, ideal for shared courtyards in Montreal plexes .
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R-32 : better volumetric efficiency and reduced climate impact compared to older refrigerants.
Sizing and zones
After calculating the loads (surface area, orientation, insulation, infiltration), a range of 12,000 to 15,000 BTU covers the open living area (living room-kitchen-dining room) with overflow to the corridor and the adjoining bedroom. This power avoids oversizing , limits noise and supports the announced yields .
Implementation details visible on this project
Outdoor installation: stability, clearances and maintenance
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Galvanized wall brackets with integrated silent blocks to break the vibration transmission to the brick .
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Unit positioned above ground level to protect the turbine from debris and facilitate HVAC maintenance (washing coils, inspecting connections).
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NEMA outdoor disconnect box installed within reach, in accordance with local electrical requirements.
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Vertical brown cable cover for refrigeration lines and communication cables: clean routing and UV protection.
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Respect side and front clearances to avoid air recycling in summer and ensure effective defrosting in winter.
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Adjoining context: an old neighboring unit is visible from above; we have oriented the discharge and checked the distances to prevent any air flow interaction.
Wall crossing and refrigeration lines
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Compact crossing through the brick with waterproof sleeve .
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Brazing of the fittings, deep vacuum to the micron and leak testing before releasing additional load if necessary.
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Continuous insulation of lines to limit losses and prevent condensation .
Condensate management on the interior side
When the slope is available, we favor gravity flow to the outside to eliminate noise risks and maintenance related to a pump. In this project, the configuration of the interior head and the proximity of the facade allow for a short and reliable route.
AirGreen method: rigorous commissioning and monitoring
Documented commissioning
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Vacuum gauge to check that the vacuum is reached and maintained.
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Stabilization and control of residual humidity.
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Initial measurements : inlet/outlet temperatures, pressures, current, voltage.
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Load adjustment if actual line length requires it.
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Commissioning log archived for traceability.
Noise and neighborhood
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Low speed mode recommended for nighttime.
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Silent blocks and rigid brackets to limit structural transmission to the load-bearing wall.
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Blowing orientation avoiding windows and common areas.
This approach responds to the dense challenges of Montreal and applies equally to Laval , Longueuil , the North Shore and the South Shore when the houses are close together.
Performance, savings and subsidies
Seasonal yields
Combined with proper sizing, the Sharp wall-mounted heat pump offers:
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low-consumption air conditioning in summer,
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economical additional heating in spring and autumn,
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stable comfort thanks to inverter modulation.
Financial aid: what you need to know
Active programs in Quebec encourage energy-efficient appliances, often Energy Star , using recent refrigerants ( R-32/R-454B ), and displaying good performance at low temperatures . We:
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let's check the admissibility of the model and the building,
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let's prepare the necessary documents,
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We guide customers from Montreal , Laval , Longueuil , North Shore and South Shore to maximize returns.
HVAC Use and Maintenance Tips
Good daily practices
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Allow the device to modulate rather than turning it on/off frequently.
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Clean the internal filters every 4–8 weeks during use.
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Gently rinse the outdoor heat exchanger in the spring; avoid concentrated jets.
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Maintain 30–50 cm of clearance around the condenser.
AirGreen Maintenance Visit
An annual inspection consolidates longevity: pressure check, tightening of connections, checking of defrosting , upgrading of insulation and cable cover if necessary.
When to switch to two zones?
In elongated or multi-story dwellings, a single head can leave cold spots . We then propose a MultiZone (Sharp BU/TU) sized room by room (9k/12k/18k/24k BTU) to distribute the load without oversizing a single unit. This strategy is relevant as much to HoMa as in houses in Laval or the South Shore .
What this installation brings to owners
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Immediate comfort in the living area, uniform freshness and gentle warmth in the off-season.
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Silence and respect for the neighborhood thanks to the positioning on brackets and modulation.
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Controlled aesthetics : matching brown cable cover , straight installation, clean wiring, accessible disconnection box .
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Easy maintenance : raised unit, secure access from the balcony or ladder, compliant clearances.
AirGreen: your HVAC partner in Greater Montreal
We combine diagnosis , installation , commissioning and monitoring to guarantee measurable results. Our team supports individuals and condominiums in Montreal , Laval , Longueuil , on the North Shore and the South Shore . Each project receives a tailor-made approach: load calculation, discreet layouts, choice of supports (brackets, slabs, plates), and usage advice.
Looking for consistent comfort and a controlled bill? We'll provide you with a free quote , including a layout plan and estimated savings based on your configuration.
Express FAQ
Can the Sharp Eco Inverter heat in Montreal in winter?
Yes, for backup and off-season use. It relieves the main system during moderate cold weather and improves comfort in key rooms.
Is one head enough?
In a well-open 4 1/2, 12,000–15,000 BTUs typically cover the living area. If the bedrooms are far apart, an addition (second head or MultiZone ) ensures more even distribution.
What maintenance obligations?
Regular filters , seasonal flushing of the outdoor unit, and annual AirGreen visit to maintain yields and durability .
Conclusion
This Sharp Eco Inverter wall-mounted heat pump installed in Mercier–Hochelaga-Maisonneuve illustrates our requirements: precise sizing , installation on anti-vibration brackets , clean finishes (cable covers, disconnections), and instrumented commissioning . A solution adapted to Montreal plexes that combines comfort , silence and savings all year round.