Installation of a SHARP BU DoubleZone wall-mounted heat pump in Montreal North
Professional installation of a SHARP BU DoubleZone wall-mounted heat pump in Montreal North by AirGreen. Comfort, Plasmacluster air purification, efficiency down to -27°C, Wi-Fi control. An ideal HVAC solution for Quebec winters.
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 custom installation for optimal performance in a demanding Montreal residential environment
At AirGreen , we recently completed a SHARP BU DoubleZone wall-mounted heat pump installation in a residential home located in Montreal North , an area where winters are harsh and summers are increasingly hot. The goal of this mission was to offer our client 4-season thermal comfort, superior air quality and remarkable energy efficiency. Thanks to our expertise and SHARP 's advanced Japanese technology, we were able to successfully meet this challenge.
Installation context: Comfort, discretion and efficiency
Our client was looking for a dual zone solution to cover two main rooms: a spacious living room and an adjacent bedroom, both located on the upper floor of the house. The desire was to have independent temperature control , increased energy efficiency and a quiet system , without compromising the interior design.
After a complete site assessment and in-depth discussion with the client, we recommended the installation of a SHARP BU DoubleZone wall-mounted heat pump , a system renowned for its exceptional performance in northern climates and reliable operation down to -27°C.
Why the SHARP BU DoubleZone series?
The SHARP BU DoubleZone , combined with two AY-XPC12BU indoor units, offers a heating capacity of up to 26,000 BTU/h and a cooling capacity of 24,000 BTU/h , more than covering the thermal needs of both rooms. Here are some of the technical features that motivated our choice:
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R-32 refrigerant : more environmentally friendly, with a 70% lower global warming potential (GWP) compared to R-410A.
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Plasmacluster Technology : active air purification, neutralizing viruses, bacteria, mold and odors .
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SEER rating up to 25 / HSPF 11.5 : guaranteeing high level energy efficiency.
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Reliable operation down to -27°C thanks to the patented HOT GAS PIPE system, preventing ice formation in the outdoor unit.
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Built-in Wi-Fi smart controls , compatible with Alexa and Google Assistant.
Stages of the installation project in Montreal North
Needs assessment and strategic choice
We began with a thermal analysis of the two areas to be air-conditioned. The south-facing living room with large windows required precise sizing to avoid efficiency losses. The bedroom, more insulated, required stable and quiet nighttime comfort.
Preparation and aesthetic integration
Our team proposed a high-wall integration that was both discreet and efficient. The sleek finish of the SHARP indoor unit blends perfectly with the modern aesthetic of the residence. The routing of the refrigeration and electrical wiring was optimized to avoid affecting the visible walls, particularly in the stairwell.
Technical installation and functional testing
We installed the AE-X3M24BU outdoor unit on a wall mount at the back of the house, with reinforced insulation and a raised base to withstand Montreal's snow. The refrigeration circuit was pressurized with nitrogen to detect any microleaks, then evacuated and charged according to SHARP's specifications.
Finally, comprehensive tests were carried out, confirming stable temperature, quiet airflow, and active air purification thanks to Plasmacluster ions .
Concrete results for our client
The installation was completed in just one day. The client immediately felt the difference in thermal comfort : a cool and pleasant living room even in the middle of summer, a warm and stable bedroom in winter, and continuously purified air .
Furthermore, the integration of the SHARP mobile application allows the customer to manage both zones independently and remotely. This feature is particularly useful for adjusting the temperature before returning home or for saving energy in away mode .
Financial aid and grants available
This type of installation is eligible for several financial assistance programs, including:
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Hydro-Québec's LogisVert Program
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RénoClimat tax credit
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Federal Green House Grant (grants up to $5,000)
Our team supports each client in putting together their grant application , in order to optimize their return on investment.
Why choose AirGreen for your HVAC installation in Montreal North?
At AirGreen, we're not just an installer. We're your HVAC partner , every step of the way: from personalized recommendations to professional installation and annual preventative maintenance .
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Certified and experienced technicians
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Guaranteed installations
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Fast and local after-sales service
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Specific expertise in multi-zone wall-mounted heat pumps
Our in-depth knowledge of SHARP products, including the BU DoubleZone series, allows us to maximize comfort and energy efficiency, even in the extreme conditions of Montreal and surrounding areas (Laval, Longueuil, North Shore, South Shore).
Practical advice for owners
Here are some key recommendations to ensure the longevity of your heat pump:
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Have the filters cleaned every 3 months.
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Schedule a complete professional maintenance every year, especially before winter.
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Use eco and timer modes to optimize consumption.
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Make sure the outdoor unit is clear of snow and dead leaves.
Customer Testimonial
“I am very satisfied with AirGreen’s service. The system works wonderfully, and I have already seen a significant drop in my electricity bill. The air is fresher, cleaner, and best of all, I control everything from my phone.”
– Philippe B., Montreal North
Conclusion
This SHARP BU DoubleZone wall-mounted heat pump installation in Montreal North is a perfect example of the combination of advanced Japanese technology and Quebec know-how. Thanks to SHARP's performance and the expertise of our AirGreen team , we were able to transform a need into sustainable and intelligent comfort.
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).