Installation of a Sharp Eco Inverter heat pump on a flat roof in Saint-Laurent (Montreal)
Installation of a Sharp Eco Inverter heat pump in Saint-Laurent by AirGreen: performance, comfort and durability for a commercial building 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.
An energy-efficient solution from AirGreen for a commercial building
At AirGreen , we recently installed a Sharp Eco Inverter heat pump on the flat roof of a commercial building located in the Saint-Laurent area of Montreal. This installation perfectly illustrates our expertise in high-performance HVAC systems adapted to urban buildings and Quebec's climatic conditions.
A strategic choice: the Sharp Eco Inverter heat pump
The Sharp Eco Inverter , equipped with Plasmacluster Ion technology, ensures optimal thermal comfort all year round while guaranteeing exceptional indoor air quality. This centralized wall-mounted heat pump offers high energy efficiency , thanks to its inverter compressor which automatically adjusts the power according to the actual heating or cooling demand.
Designed to withstand the extreme winter conditions of Greater Montreal , Sharp's Eco Inverter series operates efficiently down to -25°C, while maintaining stable and quiet performance. It's an ideal solution for commercial buildings, high-end condos, or multi-family residences requiring maximum efficiency and long-term reliability.
Technical details of the installation
This installation was carried out on an insulated flat roof , typical of commercial buildings in Saint-Laurent. The Sharp outdoor unit was mounted on a galvanized aluminum structure , resting on treated wood crosspieces to ensure even weight distribution and prevent any perforation of the waterproofing membrane.
The entire anti-vibration mount has been custom-designed to reduce noise pollution and extend the system's lifespan. The refrigeration ducts and electrical lines have been carefully protected by waterproof capping, ensuring increased weather resistance .
Particular attention has been paid to securing roof passages and protecting condensate pipes against freezing , allowing efficient drainage even in winter. Thanks to this design, the Sharp heat pump can operate continuously without the risk of blockage or loss of efficiency.
AirGreen Challenges and Solutions
One of the main challenges of this project was the access height and stability of the support on a flat roof exposed to wind . Our certified technicians designed a reinforced structure that met the snow and wind load standards of the Quebec Building Code.
We have also optimized the refrigeration path in order to limit the length of the pipes and thus maximize energy efficiency . Each connection has been checked under pressure and with nitrogen , guaranteeing perfect sealing of the circuit.
Sustainable comfort and energy savings
This Sharp Eco Inverter heat pump offers an excellent performance/consumption ratio , allowing you to significantly reduce your electricity bill while contributing to reducing the building's carbon footprint.
Its inverter-modulated operation ensures a stable and consistent temperature , without frequent start-up cycles, and extends the compressor's lifespan. In addition, Plasmacluster Ion technology improves indoor air quality by neutralizing bacteria, mold, and allergens.
Long-term maintenance and performance
At AirGreen , we recommend a complete annual HVAC maintenance to ensure the performance and durability of your Sharp heat pump. This includes:
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Cleaning and checking the condenser and evaporator;
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Control of operating pressures and temperatures;
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Inspection of supports and fixings;
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Checking the defrosting system and condensate drainage.
Regular maintenance not only ensures optimal energy efficiency , but also helps prevent premature breakdowns, especially in areas with harsh winters such as Montreal or Laval .
Why choose AirGreen for your HVAC installation in Montreal?
For several years, AirGreen has established itself as a leader in the HVAC sector in Greater Montreal, offering turnkey solutions adapted to each type of building. Our teams:
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are RBQ and Énergir certified ;
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work with the best brands on the market (Sharp, Fujitsu, Gree, Midea, Hitachi, Bosch);
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guarantee durable, safe and aesthetic installations ;
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support each client in grant applications (Hydro-Québec, efficient heat pump, etc.).
This facility in Saint-Laurent reflects our commitment to providing precise, clean and sustainable service, meeting the expectations of the most demanding customers.
A visible impact: efficiency, aesthetics and serenity
The Sharp unit blends seamlessly into the building's architecture without compromising the aesthetics of the roof. Its elevated structure ensures free airflow and prevents the accumulation of snow or debris, a key element in ensuring consistent system performance year-round.
Thanks to this installation, the customer now benefits from four-season comfort , a significant reduction in operating costs , and increased property value thanks to a modern, efficient and environmentally friendly HVAC system.
Conclusion: an exemplary installation by AirGreen
This Sharp Eco Inverter heat pump installation in Saint-Laurent demonstrates our team's technical rigor and expertise . Every detail, from structural support to optimized refrigeration circuit design, has been carefully designed to provide a solution that is efficient, durable, and aesthetically pleasing .
At AirGreen , we believe that every HVAC project must combine energy performance , air quality , and peace of mind — values that we embody in each of our projects in Montreal, Laval, Longueuil, on the South Shore and the North Shore .
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).