Installation of a Sharp Eco Inverter wall-mounted heat pump in Plateau-Mont-Royal
Sharp Eco Inverter wall-mounted heat pump installed on a flat roof in Plateau-Mont-Royal. Galvanized bracket, careful sealing, and four-season performance by AirGreen, HVAC experts in Greater Montreal.
Take a tour of the installation
Each number is a point we check on site. Switch between summer and winter to watch air and heat move.
In summer, the outdoor unit rejects the house's heat outside.
Generic illustration of this type of installation, not a survey of this job site. Tap a number.
Mounted level on a wall plate, high enough for the air to reach the whole room, with enough space around it to slide the filters out easily.
The refrigerant lines, the communication cable and the drain go through the wall in a single opening, sealed against water, cold air and insects.
Two insulated copper pipes connect the two units. Outside, a line cover can protect them from sun, knocks and weather.
A shut-off switch near the outdoor unit isolates it safely for service. It must stay accessible at all times.
The compressor and the fan. In heating mode it captures heat from the outdoor air, even in winter, and moves it inside.
On the ground or on the wall, it keeps the unit above accumulated snow. The unit stays clear and defrost water can drain away.
The fan needs to blow freely. Storage, a fence or a wall too close, and efficiency drops while noise goes up.
Reliable winter performance on flat roofs, signed AirGreen
In the heart of Plateau-Mont-Royal , we are commissioning a Sharp Eco Inverter wall-mounted heat pump for a Montreal plex apartment. The compressor is installed on the flat gravel roof , at the right height, to ensure stable operation in all seasons and preserve the occupants' peace of mind. This project illustrates our approach to each urban HVAC installation : careful preparation, technical choices adapted to Montreal's buildings, and a clean finish that respects the aesthetics and durability of the building.
Housing context and comfort objectives
The apartment features an open-plan living space with adjoining bedrooms. Clients are looking for a four-season, economical, and discreet system that can efficiently cool in the summer and provide additional heating in the winter, without noise or vibration being transmitted indoors. The Sharp Eco Inverter meets these expectations with its variable-speed compressor and quiet wall-mounted fan, offering an excellent performance/consumption ratio for mid-sized apartments in Greater Montreal .
Our method: precision, safety, durability
Installation on a flat roof
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Roof-mounted support : We use a galvanized steel frame mounted on protective sole plates to prevent any perforation of the membrane. Anti-vibration pads mechanically decouple the unit to limit the transmission of structure-borne noise.
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Useful elevation : the ground clearance ensures snow clearance and free flow of defrost water. In windy urban areas, this elevation also reduces the suction of dust and gravel.
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Compliance with clearances : the orientation leaves a clear corridor in front of the condenser battery to maintain the required air flow during winter defrost cycles.
Refrigeration path and sealing
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Sealed feedthrough : the insulated refrigeration lines and the power supply are grouped together in a technical cover, with sealing using membrane-compatible mastic and metal flashing . The objective is twofold: durable sealing and easy maintenance.
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Optimized length : On this type of plex, the roof → interior head distance is generally in a short to medium range, which is beneficial for efficiency and refrigerant charge. We avoid unnecessary bends, which reduces pressure losses and facilitates any future maintenance.
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Condensate management : the internal head is installed with a gravity drain when the configuration allows it. In constrained configurations, we integrate a silent condensate pump with a check valve and odor trap. Outside, the defrost flow remains free, away from passageways.
Power supply and protection
We connect the unit to a dedicated double-pole circuit breaker , in accordance with the Canadian Electrical Code. A proximity switch (disconnect) on the roof allows safe disconnection for maintenance. The wiring is protected in a UV- and thermal-shock-resistant sheath, mechanically secured to withstand rooftop winds.
Finishing and integration
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White interior capping for neat integration and quick maintenance.
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Marking and labeling of lines for clear identification during future interventions.
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Complete tests : sub-micron vacuum, nitrogen leak test , load checked according to actual length, then controlled start-up with verification of blowing/return temperatures and compressor intensity.
Why the Sharp Eco Inverter for a Montreal plex?
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High-efficiency inverter : continuous modulation precisely adapts the power. Result: stable comfort , long cycles without jolts, contained consumption.
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Operation in biting cold : the Eco Inverter series is designed for northern climates and maintains a good level of heating in low temperatures, ideal for Montreal , Laval and the exposed areas of the Plateau .
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Quiet operation : optimized fan and isolated compressor limit disturbances for immediate neighbors and occupants.
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Air Quality : Sharp's proprietary ionizing technology contributes to healthier indoor air when the head is equipped with the appropriate module.
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Simplified maintenance : front access to the filter, clear diagnostics, and architecture that facilitates cleaning of the external battery on a flat roof.
Grants and savings
Due to its high seasonal efficiency and Energy Star certification across multiple capacities, this wall-mounted heat pump may be eligible for active grant programs in Quebec, depending on the capacity selected and current criteria. We assist our clients in validating eligibility for provincial and municipal programs and in preparing supporting documentation. Annual savings come from inverter modulation and heat transfer, which is significantly more efficient than electric baseboard heaters.
Construction site challenges… and our solutions
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Wind and ice : On roofs, wind can increase the icing of the battery. We position the unit behind a parapet whenever possible, while maintaining regulatory clearances.
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Structural noise : we mechanically decouple the chassis using silent blocks and distribute the load over wide bases . Vibrations are dampened, acoustic comfort is preserved.
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Roof waterproofing : Each opening is treated with membrane-compatible flashings and approved sealants to prevent infiltration. Photographic documentation is provided to the client.
What the customer gains on a daily basis
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Four-season comfort : consistent air conditioning in summer, efficient supplementary heating in the off-season and in severe cold.
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Aesthetics preserved : no units on balconies or facades. The interior headboard remains discreet, the exterior is invisible from the street.
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Controlled costs : modulation = more stable bills, optimized defrosting cycles, less mechanical stress and therefore increased durability .
Maintenance recommended by AirGreen
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Filter cleaning : every 4 to 8 weeks during use.
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Annual inspection : pressure check, cleaning of exchangers and checking of roof supports and wiring.
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Winter clearance : even on a flat roof, keep the unit clear of snow and ice around the base to allow defrost condensate to drain away.
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Indoor hygiene : periodic HVAC maintenance (gentle disinfection of the exchangers and the tank) maintains air quality and efficiency.
Why entrust us with your project in Montreal, Laval, Longueuil, North Shore and South Shore?
At AirGreen, we are experts in the typical plex and condo configurations of Greater Montreal : flat roofs , restricted access, short to medium refrigeration runs, sealing constraints and noise management. Our strength lies in anticipation: identifying the best locations, choosing suitable supports , protection against bad weather, clear documentation for condominium associations, and support on subsidies .
We respond quickly with specific time slots, a clean site, and a reachable after-sales service . Each installation is adjusted, measured, and explained so that the customer fully enjoys their wall-mounted heat pump from day one.
Summary technical sheet of the intervention
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Type : Sharp Eco Inverter wall-mounted heat pump (mini-split) , single indoor head.
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External installation : on flat gravel roof , galvanized frame, protective soles, anti-vibration .
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Route : sealed roof crossing, insulated refrigeration lines, clean capping inside.
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Electrical : dedicated circuit with disconnect on roof, UV protected routing.
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Commissioning : high vacuum, nitrogen leak test, intensity/temperature check, instructions given to the customer.
The big day, step by step
The main steps of this kind of job at AirGreen. Every house has its quirks: the estimate brings them out.
We look at the room, the outside wall, the line route and where the outdoor unit will go. That is where the capacity gets chosen.
Model, capacity and price, in writing. We also check whether the model qualifies for assistance programs.
Floors and furniture protected, wall plate position marked level, wall opening located.
A single opening, with the slope the drain needs to flow outside.
Set on a stand raised above the snow, with the clearances the manufacturer requires.
Connected, insulated and protected. The opening is then sealed against water, cold air and insects.
A dedicated circuit and an accessible disconnect near the outdoor unit.
Leak test, vacuum, then start-up and a check of heating and cooling.
Remote, modes, filters: we show you the essentials before we leave.
- The on-site estimateWe look at the room, the outside wall, the line route and where the outdoor unit will go. That is where the capacity gets chosen.
- The quoteModel, capacity and price, in writing. We also check whether the model qualifies for assistance programs.
- Getting readyFloors and furniture protected, wall plate position marked level, wall opening located.
- The wall openingA single opening, with the slope the drain needs to flow outside.
- The outdoor unitSet on a stand raised above the snow, with the clearances the manufacturer requires.
- Lines, cable and drainConnected, insulated and protected. The opening is then sealed against water, cold air and insects.
- The electrical workA dedicated circuit and an accessible disconnect near the outdoor unit.
- Tests and start-upLeak test, vacuum, then start-up and a check of heating and cooling.
- The walkthroughRemote, modes, filters: we show you the essentials before we leave.
What would it look like at your place?
Two quick checks with real numbers: what heat costs, and what your current heaters add up to in BTU/h.
Conversion: 1 W = 3.412 BTU/h. An indication, not a load calculation: baseboards and furnaces are often stronger than the real need, and they can stay as backup. AirGreen confirms the capacity on site.
Four mistakes we do not make
Flip each card to see what we do instead.
Your own project, step by step
What to do, season by season
Three habits per season for this unit. They take a few minutes and prevent many calls.
- Clean the indoor unit's filters.
- Clear leaves and debris left on the outdoor unit by winter.
- Test cooling before the first hot days.
- Clean the filters more often when the unit runs a lot.
- Keep plants away from the outdoor unit.
- Check that no water drips from the indoor unit.
- Rake the leaves around the outdoor unit.
- Test heating before the first cold days.
- Book periodic maintenance before winter.
- Keep snow away from the stand and the front of the unit.
- Let the unit defrost: it is normal.
- Never hit the ice on the fins; call us if the unit stays iced up.
Is your home ready?
Check what applies at your place. A "no" is not a refusal: it is what we sort out during the estimate.
Four statements: true or false?
It all comes down to details you have just seen.
1. In heating mode, the outdoor unit can produce water.
During defrost cycles. That water must drain away without forming ice.
2. You pick the capacity with a simple square-footage rule.
Windows, insulation, orientation and how the room is used all count. Capacity is chosen on site.
3. A multi-zone connects several indoor heads to a single condenser.
One head per room, all on the same condenser. Each room keeps its own temperature.
4. The disconnect can sit behind the patio furniture.
It must stay accessible: it is what shuts the unit off for service.
0 / 4 right answers
What people ask us about this kind of work
Does a wall-mounted heat pump heat in winter?
Wall-mounted or multi-zone: how do I choose?
Where does the outdoor unit go?
Are there grants?
Do I need a permit?
How cold can it heat?
How much can I save?
How is the LogisVert assistance calculated?
Is it noisy?
The outdoor unit is covered in ice: is that normal?
Does AirGreen hold the required licences?
Is the estimate free?
No question matches. Write to us: we answer.
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Text and photo: a real AirGreen Climatisation & Chauffage job. The diagrams are generic illustrations of the type of installation, not a survey of this job site. Sources of the added figures: airgreen.ca product pages (NEEP / AHRI performance), Hydro-Québec (Heat pumps page, LogisVert, read on 13 October 2026), Régie de l’énergie (rate D as of 1 April 2026).