Installation of a Sharp Eco Inverter wall-mounted heat pump in Saint-Laurent
AirGreen installed a Sharp Eco Inverter heat pump on a flat roof in Saint-Laurent. A reliable and efficient HVAC solution for Montreal, Laval, the North Shore, and the South Shore.
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An HVAC installation perfectly suited to Montreal’s flat roofs
At AirGreen , we often encounter urban contexts where the installation of a wall-mounted heat pump requires special adaptation to the flat roofs of residential and commercial buildings in Montreal. In this project in Saint-Laurent , we installed a Sharp Eco Inverter outdoor unit, known for its energy efficiency and reliability in the Quebec climate.
Choosing the Sharp Eco Inverter heat pump
The Sharp Eco Inverter is a popular model among our customers who are looking for a balance between performance, reliability, and controlled operating costs. Designed to withstand our harsh winters, it offers:
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Stable heating capacity down to very low temperatures.
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Quiet operation , both indoors and outdoors.
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High energy efficiency , reducing electricity costs.
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Compatibility with provincial and federal grant programs , including LogisVert and Greener Homes.
With available power ranging from 9,000 to 24,000 BTU , this range covers small condos as well as single-family homes or medium-sized businesses.
Technical details of flat roof installation
For this project, several constraints were identified and resolved thanks to the expertise of our team:
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Flat roof support : The outdoor unit was installed on raised supports with treated wooden crosspieces , resting on a stabilized base with insulating foam. This protects the roof gravel while ensuring even weight distribution.
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Refrigerant pipe routing : the wiring and insulated piping were routed through a technical duct, carefully sealed to prevent any water infiltration.
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Condensate management : the configuration allowed gravity drainage , avoiding the addition of a lifting pump.
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Working at Height : Although the unit was on a roof, the drop remained low (less than 8 feet), eliminating the need for a working at height surcharge.
This type of installation perfectly illustrates the versatility of Sharp HVAC solutions in an urban environment.
The benefits of an installation optimized by AirGreen
Every installation we carry out is designed to maximize the lifespan of the equipment and minimize maintenance costs . In this specific case:
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The raised support protects against snow and ice accumulation.
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Insulating pipes limits heat loss and improves efficiency.
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The wiring is organized to facilitate any future maintenance.
We also emphasize the importance of regular maintenance : cleaning filters, inspecting connections, and checking the condensate drain. These simple steps can prevent 80% of common breakdowns.
Why choose AirGreen for your HVAC projects in Montreal and Laval?
Our expertise covers the entire Greater Montreal area—from Saint-Laurent to Laval, Longueuil, the North Shore, and the South Shore . By using AirGreen, you benefit from:
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A free on-site assessment , without obligation.
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Personalized advice based on your building, your budget and the comfort you require.
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Comprehensive support for available grants .
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Fast and professional after-sales service .
Conclusion: lasting comfort in all seasons
With this installation in Saint-Laurent, our client now benefits from four-season comfort while reducing their energy consumption. The Sharp Eco Inverter represents a strategic choice for urban buildings, combining performance and peace of mind.
The job tools
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.
How the job unfolds
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 we check on a job like this one
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.
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.
Good habits, once the unit is in place
Six simple habits that keep the unit going. Your list stays on this device.
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.
The right pages, at the right time
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).