Installation of a SHARP BU DoubleZone Wall-Mounted Heat Pump in Côte Saint-Luc
Professional installation of a SHARP BU DoubleZone wall-mounted heat pump in Côte Saint-Luc, providing optimal two-zone comfort—even down to -27°C—thanks to Plasmacluster technology and R-32 refrigerant.
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 HVAC project for year-round comfort in Côte Saint-Luc
At AirGreen, we believe every wall-mounted heat pump installation is an opportunity to create lasting, energy-efficient, and intelligent comfort for our clients. Recently, we had the privilege of completing an HVAC installation in Côte Saint-Luc, in the west end of the Island of Montreal, where we installed a SHARP BU DoubleZone wall-mounted heat pump, a premium solution for homes requiring independent heating and cooling management across multiple zones.
This project showcases our expertise in residential HVAC, our attention to detail, and our ability to deliver high-quality Japanese products tailored to the unique climate challenges of Quebec.
Why choose the SHARP BU DoubleZone? A perfect fit for Côte Saint-Luc
The SHARP BU DoubleZone wall-mounted heat pump is specifically designed to meet the needs of homes that want to control two separate zones with a single outdoor unit. It’s a multizone system, ENERGY STAR certified, offering not only high energy efficiency but also integrated air purification thanks to SHARP’s exclusive Plasmacluster technology.
Key technical features of the SHARP BU DoubleZone:
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Outdoor unit: AE-X3M24BU
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Capacity: 24,000 BTU cooling / 26,000 BTU heating
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Performance down to -27°C, thanks to Hot Gas Pipe technology
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R-32 refrigerant, eco-friendly and efficient
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Minimal noise level (49–50 dB outdoor)
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Two AY-XPC12BU indoor units with strong airflow (438 CFM)
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Compact dimensions: ideal for residential wall-mounted setups
Thanks to its inverter technology, this system quickly reaches the desired temperature in both zones while significantly reducing energy consumption once that temperature is achieved.
A well-planned installation in Côte Saint-Luc
This project was completed in a renovated bungalow in Côte Saint-Luc, where the homeowners were looking to upgrade their heating system while adding cooling capabilities for summer.
Here are the key steps of our installation:
1. Evaluating the client’s needs
We carried out a comprehensive thermal analysis of the two areas to be conditioned: the main living room on the ground floor and the family room in the basement. Each space required independent capacity for optimal comfort.
2. Strategic placement
The outdoor unit was installed on reinforced wall mounts at the back of the house, to minimize noise and ensure proper clearance. Thanks to smart planning, the unit doesn’t interfere with foot traffic or the home’s aesthetics.
3. Installing the indoor units
Two AY-XPC12BU wall-mounted units, sleek and discreet, were installed strategically:
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One in the basement family room, with optimized frost protection clearance
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One in the main living room, mounted high to maximize airflow
4. Connections and commissioning
We installed insulated copper refrigerant lines, protected electrical connections, and gravity-fed drainage in full compliance with all standards. We then conducted a nitrogen pressure test, a vacuum test, and performed a full R-32 refrigerant charge with care and precision.
5. Calibration, testing, and client training
After completing performance testing, we took the time to show the client how to use the remote control, configure smart scheduling, and take advantage of the eco-friendly mode and Plasmacluster air purification system.
Tangible benefits for the client
This Côte Saint-Luc family now enjoys:
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Comfort across two floors (basement and main level)
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Significant energy savings on their electric bill
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Cleaner indoor air, thanks to the triple filtration system: HEPA filter, activated carbon, and Plasmacluster ion technology
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A quiet, reliable unit built for Quebec’s extreme climate
A heat pump built for Quebec: performance down to -27°C
The AE-X3M24BU model truly stands out for its ability to heat effectively even in frigid temperatures. Thanks to SHARP’s exclusive Hot Gas Pipe system, defrosting is faster, more complete, and doesn’t compromise the unit’s overall efficiency.
Here are some heating performance numbers:
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-8.3°C: 25,000 BTU/h
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-15°C: 21,200 BTU/h
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-20°C: 18,600 BTU/h
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-25°C: 15,700 BTU/h
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-27°C: 14,600 BTU/h
Available grants for this type of installation
This SHARP DoubleZone heat pump is eligible under Hydro-Québec’s LogisVert program, allowing qualified homeowners to receive a substantial rebate, up to $2,172 depending on the setup. At AirGreen, we handle all rebate documentation for you, making the process seamless and stress-free.
Why choose AirGreen for your HVAC installations?
We’re not just installers – we’re full-service HVAC experts. Every project is approached with unmatched attention to detail, personalized customer service, and industry-leading equipment.
✔️ Certified and insured
✔️ Installations 100% compliant with CSA-B52 standards
✔️ Tailored technical advice for your home
✔️ Responsive, transparent after-sales service
✔️ Hundreds of satisfied clients across Montreal, Laval, Longueuil, North Shore, and South Shore
Conclusion: A long-term year-round solution
This Côte Saint-Luc installation proves how a SHARP multizone wall-mounted heat pump can transform a house into a comfortable, healthy, and energy-efficient living space. Thanks to precise Japanese technology, a professional installation by AirGreen, and support for available grants, our client now enjoys peace of mind and perfect comfort, winter or summer.
You too can optimize your home’s comfort. Contact AirGreen for a free quote and a tailor-made solution for your property.
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?
Pick what looks like your need.
Four mistakes we do not make
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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).