Installation of a SHARP BU DoubleZone Wall-Mounted Heat Pump in Dorval
Installation in Dorval of a SHARP BU DoubleZone wall-mounted heat pump featuring Plasmacluster air purification technology. Reliable heating down to -27°C, advanced air purification, smart Wi-Fi control, and outstanding energy efficiency.
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.
A sleek, high-performance, air-purifying solution for optimal comfort in Dorval
At AirGreen, we recently completed the installation of a SHARP BU DoubleZone wall-mounted heat pump in a residence located in the city of Dorval, on the western tip of the Island of Montreal. This project highlights not only our expertise in residential HVAC installation, but also the many benefits of this bi-zone SHARP system, which stands out for its performance, energy efficiency, and exclusive technological innovations like the Plasmacluster system.
A strategic installation to maximize comfort in two separate zones
In this Dorval residence, the layout of the rooms required a solution capable of efficiently heating and cooling two distinct spaces. The SHARP BU DoubleZone heat pump, with its indoor wall-mounted units and its outdoor unit AE-X3M24BU, proved to be the ideal choice. We installed each indoor unit in strategic locations to ensure optimal airflow circulation in the main rooms while respecting the home’s existing structure and aesthetics.
The wall-mounted units, with their sleek design, blend in perfectly with the residential interior without altering the décor. The glossy white finish, curved lines, and whisper-quiet operation all contribute to a calm, healthy, and comfortable environment.
Cutting-edge Japanese technology designed for Quebec homes
The BU series from SHARP is engineered with high-precision Japanese technology, featuring the renowned Plasmacluster ions, exclusive to SHARP. These ions, continuously released into the ambient air, neutralize bacteria, viruses, allergens, mold, and persistent odors, while maintaining exceptional air quality—an invaluable asset for families concerned with respiratory health.
Performance and efficiency tailored for harsh Quebec winters
The AE-X3M24BU outdoor unit, paired with two indoor units (in this case, an AY-XPC12BU and an AY-XPC18BU), is built to withstand our harsh winters. Thanks to SHARP’s patented “HOT GAS PIPE” system, it can maintain a heating capacity of up to 14,600 BTU/h at -27 °C. This is a crucial feature for Dorval and other areas of West Island Montreal, where winter temperatures can plunge well below freezing for extended periods.
The published performance is impressive:
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Heating capacity: up to 26,000 BTU/h
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Cooling capacity: 24,000 BTU/h
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SEER up to 25 / HSPF up to 12
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Eco-friendly R-32 refrigerant, with a low global warming potential
Key technical features of the installed system
Here is a summary of the technical specs of the SHARP BU DoubleZone system installed in Dorval:
| Component | Model | Capacity (BTU/h) | Sound Level (dB) |
|---|---|---|---|
| Indoor unit | AY-XPC12BU | Cooling: 11,500 / Heating: 14,000 | 23-43 |
| Indoor unit | AY-XPC18BU | Cooling: 19,500 / Heating: 26,000 | 25-49 |
| Outdoor unit | AE-X3M24BU | Cooling: 24,000 / Heating: 26,000 | 50 |
Other notable technical features:
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R-32 refrigerant, environmentally friendly
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Heating operating range: -27°C to +24°C
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Wi-Fi smart controls
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Compatible with Google Assistant and Alexa
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Automatic energy-saving mode
Installation challenges
One of the main challenges in this Dorval project was the limited space on a load-bearing wall, close to a window. We carefully planned the placement of the indoor unit to ensure a safe distance from window trims while maximizing airflow throughout the room. Outdoor access also required the use of a lift, as the outdoor unit had to be mounted on a side wall, away from the main entrance, to minimize visual impact.
Thanks to our experience working with residential buildings across the Montreal region, our technicians were able to complete this installation with pinpoint precision while keeping the intervention time short to minimize disruption for the homeowner.
A solution tailored to the client’s needs
Our client was looking for a system that was:
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Quiet
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Eligible for energy grants
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Capable of managing multiple distinct zones in the house
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Aesthetically discreet and easy to control remotely
The SHARP BU DoubleZone met all their expectations. The client now enjoys a stable and consistent temperature in the main rooms, continuous air purification, and noticeable energy savings throughout the year.
Why choose AirGreen for your wall-mounted heat pump installation?
At AirGreen, we don’t just sell and install heat pumps—we guide our clients every step of the way. Our service includes:
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Thermal analysis of your space
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Assistance in selecting the most suitable model
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Help with applying for government grants
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Certified professional installation
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Fast and reliable post-installation support
Grants and eligibility
The SHARP BU DoubleZone system installed here is eligible for Hydro-Québec’s LogisVert grants and other provincial energy efficiency programs. Our team assisted the client with their application, significantly reducing the total cost of the installation.
Final result: Year-round comfort, purified air, and peace of mind
This installation of a SHARP bi-zone wall-mounted heat pump in Dorval is a perfect example of AirGreen’s commitment to delivering high-performance, durable, and smart HVAC solutions to our clients in Montreal and surrounding areas.
With purified ambient air, consistent year-round temperatures, and equipment that blends beautifully into the home, this solution exceeds even the highest expectations.
The unit on this job, in figures
The range as published on airgreen.ca: pick a size to see its capacity in deep cold.
| Size | Heating at −8 °C | Heating at −15 °C | Coldest certified point | COP at −15 °C | SEER | HSPF | Indicative LogisVert aid |
|---|---|---|---|---|---|---|---|
| Sharp BU 24 0002 Zones (Dual Zone) | 25,000 | 21,200 | −27 °C: 14,600 | 2.3 | 24.0 | 11.5 | $3,000 |
| Sharp BU 24 0003 Zones (Triple Zone) | 25,000 | 21,200 | −27 °C: 14,600 | 2.3 | 24.0 | 11.5 | $3,000 |
Among the year’s most efficient according to ENERGY STAR, on top of its cold-climate certification.
Minimum certified capacity (NEEP): it slows down instead of stopping when a single room calls.
NEEP still lists 14,600 BTU/h at a COP of 1.84 at −17 °F.
Global warming potential of R-32, versus 2,088 for R-410A (ENERGY STAR).
Among the year’s most efficient according to ENERGY STAR, on top of its cold-climate certification.
Minimum certified capacity (NEEP): it slows down instead of stopping when a single room calls.
NEEP still lists 14,600 BTU/h at a COP of 1.84 at −17 °F.
Global warming potential of R-32, versus 2,088 for R-410A (ENERGY STAR).
Data read live from the airgreen.ca page of each size (NEEP / AHRI certified performance). When the title names the installed size, it is highlighted; otherwise the whole range is shown. The aid shown is today’s, using Hydro-Québec’s rule ($120 per 1,000 BTU/h at −8 °C); amounts quoted in the article date from its publication. Only Hydro-Québec confirms the assistance granted.
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.
Baseboards and electric furnaces turn 1 kWh of electricity into 1 kWh of heat. A heat pump delivers more: that is its COP. At Hydro-Québec’s rate D (11.142¢/kWh above 40 kWh a day, since 1 April 2026):
Hydro-Québec: a heat pump can be up to three times more efficient than baseboards for heating in the colder months.
Estimate per kWh of heat, at the chosen temperature, using the certified COP from the product page. Taxes, access charge and backup heat not included.
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.
More jobs to see, near you
By town, by equipment or by region: browse more than 4,700 published projects.
Each dot: a town where AirGreen has published projects. The glowing dot: this job.
Every house has its constraints. We see them before we install.
The on-site estimate is free and the quote follows within 24 hours.
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).