SHARP BU DoubleZone Wall-Mounted Heat Pump Installed in Outremont: Tailored Comfort by AirGreen
Installation of a SHARP BU DoubleZone wall-mounted heat pump in Outremont featuring Plasmacluster technology, operation down to -27 °C, and Wi-Fi control. A tailored two-zone comfort solution by AirGreen.
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 Customized Installation in the Heart of Outremont
At AirGreen, we recently completed the installation of a SHARP BU DoubleZone wall-mounted heat pump in a classic home in the charming neighborhood of Outremont, Montréal. This project perfectly illustrates our commitment to highly personalized HVAC solutions, both technically and aesthetically. The installed system is a dual-zone model, combining two indoor wall units connected to a single high-performance outdoor unit, all using R32 refrigerant, which is both eco-friendly and energy-efficient.
Why Choose the SHARP BU Series for an Outremont Residence?
The selection of this SHARP BU multi-zone wall-mounted heat pump was no accident. In residential neighborhoods like Outremont, where homes often feature complex architectural layouts, it’s essential to choose a system capable of serving multiple rooms simultaneously while minimizing both visual and acoustic impact. Here are the main advantages of this series:
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Multi-zone technology: Enables heating and cooling two separate rooms with a single outdoor compressor, reducing both space usage and energy consumption.
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Exclusive Plasmacluster technology: Purifies indoor air by eliminating viruses, bacteria, mold, and odors. A major plus for families.
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High energy performance: With a SEER of 25 and an HSPF of 12, this system offers substantial savings on energy bills.
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Extreme cold operation down to -27 °C, thanks to SHARP’s patented “HOT GAS PIPE” technology, ensuring unmatched winter comfort in Montréal.
Installation Steps: A Model Project by AirGreen
Assessing the Client’s Needs
Every project starts with an on-site technical evaluation, where our HVAC specialists assess the space, the zones to be conditioned, and structural constraints. In this Outremont home, the owners wanted to independently control two areas: the main living room and an upstairs bedroom.
Technical Challenges Encountered
One of the main challenges was the lack of a direct route between the two indoor units and the exterior wall. The image provided shows our clean and effective approach to routing refrigerant and electrical lines through a drop ceiling. To reduce visual impact, we used a neat wall grommet and securely fastened the lines before finishing work.
Discreet Outdoor Unit
The outdoor unit AE-X3M24BU, compact in size despite its power (24,000 BTU in cooling and 26,000 BTU in heating), was installed in a secluded corner of the backyard, away from windows for optimal acoustic comfort.
Technical Specifications of the Installation
Indoor Units:
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AY-XPC12BU: For the living room (12,000 BTU cooling / 14,000 BTU heating)
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AY-XPC18BU: For the bedroom (18,000 BTU cooling / 19,500 BTU heating)
Outdoor Unit:
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Model: AE-X3M24BU
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Refrigerant: R32 (low environmental impact, high efficiency)
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Heating operation range: Down to -27 °C
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Noise level: 49 dB(A), perfect for quiet residential areas like Outremont
Technology Designed for Health and Comfort
Plasmacluster System
The integrated Plasmacluster technology in SHARP BU indoor units makes a real difference. This system releases positive and negative ions that purify the air, neutralizing pathogens and eliminating persistent odors. It’s especially appreciated by families concerned about indoor air quality or allergies.
Optimized Airflow
Each indoor unit provides airflow up to 752 CFM, ensuring even distribution throughout the room. Thanks to the Coanda airflow effect, the system intelligently directs warm or cool air along walls and ceilings, avoiding direct blasts on occupants.
Smart Home Compatibility
With built-in SHARP Wi-Fi integration, residents can control their heat pump remotely via smartphone and even sync it with Google Home or Alexa. This level of connected comfort is now a must-have in modern homes.
A Result That Exceeds Expectations
The installation of this SHARP BU DoubleZone wall-mounted heat pump in Outremont truly reflects our philosophy: providing our clients with a tailor-made HVAC experience, safe, durable, and aesthetically integrated into their living space.
The client, focused on design and comfort, particularly appreciated:
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The discretion of the system, both indoors and out
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The noticeable reduction in ambient noise
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The precise control of temperature across two independent zones
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The significantly improved air quality thanks to Plasmacluster
Why Choose AirGreen for Your HVAC Installation?
We don’t just install machines. At AirGreen, every project is an opportunity to showcase our technical expertise, attention to aesthetic detail, and our commitment to energy efficiency. Thanks to our extensive experience in neighborhoods like Outremont, Montréal, Laval, Longueuil, the North Shore, and the South Shore, we’ve developed deep expertise that allows us to meet all demands — from century-old homes to new builds.
How it goes, from the first call to the end
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 the unit delivers when it is cold
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.
And 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.
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.
Which type of equipment for your project?
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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).