Installation of a FUJITSU ORION XLTH KZAH R-32 18,000 BTU wall-mounted heat pump in Candiac on the South Shore
AirGreen installs a FUJITSU ORION XLTH 18,000 BTU wall-mounted heat pump in Candiac, a silent, efficient mini-split solution adapted to Quebec winters.
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The job on one screen
The unit’s data sheet
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 |
|---|---|---|---|---|---|---|---|
| Fujitsu Orion XLTH 9 000 | 7,500 | 15,400 | −26 °C: 11,400 | 2.26 | 33.1 | 13.3 | – |
| Fujitsu Orion XLTH 12 000 | 10,000 | 16,600 | −26 °C: 12,200 | 2.16 | 30.5 | 12.7 | $1,200 |
| Fujitsu Orion XLTH 15 000 | 11,400 | 21,000 | −26 °C: 16,400 | 2.1 | 27.5 | 12.7 | $1,368 |
| Fujitsu Orion XLTH 18 000 | 13,600 | 24,800 | −26 °C: 19,110 | 2.08 | 25.5 | 12.5 | $1,632 |
| Fujitsu Orion XLTH 24 000 | 15,900 | 25,200 | −26 °C: 19,110 | 2.14 | 24.0 | 11.9 | $1,908 |
According to NEEP, it delivers up to 11,400 BTU/h at −26 °C (−15 °F), more than its 9,000 BTU cooling rating. Its efficiency there is still 1.70.
According to NEEP, its COP at −15 °C is 2.26: the highest of the Orion XLTH line, which ranges from 2.08 to 2.16 at that temperature.
At 8 °C, its certified maximum capacity reaches 23,000 BTU/h, more than double its nominal size.
According to NEEP, it delivers up to 12,200 BTU/h at −26 °C (−15 °F), more than its 12,000 BTU cooling rating. Its efficiency there is still 1.81.
At 8 °C, its certified maximum capacity reaches 23,600 BTU/h, 97% more than its nominal 12,000 BTU size.
At −26 °C, its certified minimum capacity is 1,400 BTU/h (3,500 at 8 °C). It slows down instead of cycling on and off.
According to NEEP, it delivers up to 16,400 BTU/h at −26 °C (−15 °F), more than its 15,000 BTU cooling rating. Its efficiency there is still 1.92.
According to NEEP, its COP at −26 °C is 1.92: the highest of the Orion XLTH line, which ranges from 1.65 to 1.81 at that temperature.
At 8 °C, its certified maximum capacity reaches 25,000 BTU/h, 67% more than its nominal 15,000 BTU size.
According to NEEP, it delivers up to 19,110 BTU/h at −26 °C (−15 °F), more than its 18,000 BTU cooling rating. Its efficiency there is still 1.65.
At 8 °C, its certified maximum capacity reaches 31,800 BTU/h, 77% more than its nominal 18,000 BTU size.
According to NEEP, its certified heating capacity at −15 °C (5 °F) is 24,800 BTU/h, 138% of its nominal 18,000 BTU size. Its COP there is 2.08.
According to NEEP, its certified maximum capacity at −26 °C (−15 °F) is 19,110 BTU/h, 80% of its nominal 24,000 BTU size.
At 8 °C, its certified maximum capacity reaches 36,800 BTU/h, 53% more than its nominal 24,000 BTU size.
At −26 °C, its certified minimum capacity is 3,540 BTU/h (8,200 at 8 °C). It slows down instead of cycling on and off.
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.A dash in the aid column: amount to be confirmed for this model.
The article, chapter by chapter
A high-mounted wall installation, designed to maximize comfort in a bright room in Candiac
In Candiac, on Montreal's South Shore, our AirGreen team recently installed a FUJITSU ORION XLTH KZAH R-32 18,000 BTU wall-mounted heat pump in a residential room where the choice of location, air distribution, and finish quality were particularly important. The room's configuration presented several interesting elements: a large window, a wall partially covered with tiles, a relatively low ceiling near the unit, wooden moldings around the opening, and a ceiling fan in the same space.
This type of installation requires precise analysis, because a wall-mounted heat pump should never be placed only where space seems available. It must be installed where it can truly offer stable comfort, good air circulation, safe access for maintenance, and a clean integration into the home's interior. In this project, the client wanted to improve both winter heating and summer air conditioning, while maintaining a discreet and neat visual appearance.
The chosen solution, the FUJITSU ORION XLTH 18,000 BTU, was perfectly suited to this need. This model is designed for Quebec's climatic conditions, with heating capacity down to -26 °C, excellent energy efficiency, and quiet operation. For a home located in Candiac, where winters can be harsh and summers humid, this combination of performance and comfort represents a very solid choice.
Why an 18,000 BTU wall-mounted heat pump was relevant in this project
The choice of an 18,000 BTU capacity is not arbitrary. A unit that was too weak would have struggled to stabilize the temperature on very cold or very hot days. Conversely, an oversized unit could have led to short cycles, poorer dehumidification in summer, and less consistent comfort.
In this Candiac installation, several factors were taken into account:
- the actual area to be heated and air-conditioned;
- the ceiling height and room shape;
- the presence of large windows;
- sun exposure;
- the building's insulation level;
- natural air circulation between adjacent spaces;
- the client's usage habits.
The FUJITSU ORION XLTH 18,000 BTU wall-mounted heat pump offered sufficient power here to ensure constant comfort, without excess. It effectively covers a large room or open area, while maintaining precise modulation thanks to Inverter technology.
A unit installed above a window: a decision that requires precision
The photo of this installation clearly shows the indoor unit installed above a window, near a side wall and under a visually inclined ceiling due to the perspective. This type of location can be very advantageous when the analysis is done well, but it requires meticulous installation.
One of the first elements checked by our team was the clearance around the unit. A well-executed HVAC installation must allow the appliance to draw in air correctly, blow out air without obstruction, and remain accessible for maintenance. The space available above the unit, on the sides, and below the facade must be sufficient to avoid air circulation restrictions.
We also paid particular attention to the positioning relative to the ceiling fan. In some rooms, a fan can help redistribute hot or cold air, but it can also disrupt the heat pump's flow if it's misused or if the unit is improperly oriented. In this case, the orientation of the FUJITSU heat pump's louvers allows air to be directed effectively into the room, without creating an uncomfortable draft directly on occupants.
A wall with tile finish: protecting aesthetics without compromising solidity
Installation on a wall partially covered with tiles requires a more delicate approach than a standard drywall. It is necessary to work cleanly, avoid cracks, respect alignments, and ensure that the wall support is solidly fixed. An indoor unit of this size must be perfectly level, well anchored, and installed in a way that avoids any vibration or tension on the piping.
At AirGreen, we pay particular attention to this kind of detail, because a wall-mounted heat pump is not just a technical piece of equipment: it becomes a visible part of daily life. In a living room, kitchen, veranda, or family room, the appearance of the installation matters as much as the performance.
In this project, visual integration was successful thanks to a clean positioning above the window, stable mounting, and attention to conduit routing. The indoor unit maintains a discreet presence while being strategically placed for air distribution.
Technical data of the installed model
The FUJITSU ORION XLTH KZAH R-32 18,000 BTU is a high-end model in the category of residential wall-mounted heat pumps. It is particularly interesting for homeowners in Candiac, Montreal, Laval, Longueuil, the North Shore, and the South Shore who are looking for a high-performance, reliable system eligible for current financial aid programs, according to applicable criteria.
Here are the main characteristics of the installed model:
- Brand: FUJITSU
- Series: ORION XLTH KZAH R-32
- Nominal Capacity: 18,000 BTU
- Indoor Unit: ASUH18KZAS
- Outdoor Unit: AOUH18KZAH1
- AHRI: 215647921
- Refrigerant: R-32
- ENERGY STAR®: Yes
- ENERGY STAR® Cold Climate: Yes
- Heating Capacity down to: -26 °C
- SEER2: 25.5
- HSPF2: 12.5
- EER2: 14.0
- WiFi: Included
- Indoor Sound Level: approx. 30 to 46 dB(A)
- Outdoor Sound Level: approx. 50 dB(A)
- Piping: 3/8 – 5/8 in
- Power Supply: 220V
- MCA: 20A
- MOP: 20A
- Warranty: 12 years compressor, 12 years parts, labor according to applicable options
- Indicated LogisVert Provincial Grant: $1,632, subject to eligibility and current conditions
These data explain why this FUJITSU wall-mounted heat pump is often recommended in projects where the client wants a unit capable of performing for heating, and not just for cooling.
An AirGreen installation where technical details make all the difference
Managing comfort in a room with a large window
Large windows bring light, but they also strongly influence thermal comfort. In summer, they can increase solar gain. In winter, they can become a colder zone, especially when the outside temperature drops rapidly. Installing a wall-mounted heat pump near such a zone can be very effective, provided the unit is properly sized and the air is directed intelligently.
In this Candiac home, the FUJITSU unit was positioned to quickly treat the exposed area, while projecting air throughout the room. Thanks to motorized vertical and horizontal louvers, the client can adjust the air direction according to the season. In heating mode, air can be oriented to favor a gradual descent of heat. In cooling mode, air can be diffused more widely to cool the room without discomfort.
The importance of sound level in a living room
Noise is one of the most frequent concerns during a wall-mounted air conditioner or mini-split installation. A powerful but noisy unit often ends up being used less, especially in a room where occupants read, watch TV, work, or entertain guests.
The FUJITSU ORION XLTH 18,000 BTU offers a very low indoor sound level at reduced operation. At approximately 30 dB(A) at low speed, it is easily forgotten in a residential room. Even when demand increases, the noise remains well controlled. This point was important for this project, as the unit is installed in a visible and daily-used space.
On the outside, the unit at approximately 50 dB(A) also helps preserve neighborhood tranquility. In Candiac, as elsewhere on the South Shore, residential lots can be relatively close together. A good choice of equipment and a good outdoor location can avoid several noise nuisance problems.
A solution adapted to Quebec winters
Many homeowners still think that a wall-mounted heat pump is mainly for air conditioning. However, recent models like the FUJITSU ORION XLTH are designed to provide serious heating for much of the winter. With an operating capacity down to -26 °C, this model can reduce the use of electric baseboards or supplementary heating in many situations.
Inverter technology allows the unit to modulate its operation instead of constantly starting and stopping. The result: a more stable temperature, better controlled consumption, and a more natural feeling of comfort. In a Candiac home, this stability is particularly appreciated during prolonged cold spells, when temperature variations can make some rooms uncomfortable.
R-32: a more modern choice for HVAC installations
The installed model uses R-32 refrigerant, a new-generation gas increasingly present in residential HVAC equipment. Compared to older refrigerants, R-32 offers better environmental performance while providing excellent thermal efficiency.
For homeowners who want to invest in a sustainable HVAC installation, choosing a heat pump using R-32 represents a coherent decision. This allows them to opt for equipment aligned with current industry standards, while benefiting from high heating and cooling performance.
Integrated WiFi: a tangible everyday advantage
Integrated WiFi is often perceived as a comfort option, but in practice, it can genuinely improve the use of a wall-mounted heat pump. The client can adjust the temperature remotely, program specific schedules, and avoid unnecessary heating or cooling when the house is empty.
In a residence where schedules vary, this feature becomes very practical. For example, it is possible to lower the setpoint during a prolonged absence, then restore comfort before returning home. This more intelligent management helps optimize energy consumption without sacrificing comfort.
Mistakes to avoid in a similar installation
An installation like this, above a window and near a ceiling, may seem simple at first glance. However, several errors can negatively impact the system's performance or durability.
Among the common mistakes to avoid:
- installing the unit too close to the ceiling, which limits air intake;
- neglecting the impact of a ceiling fan on air distribution;
- choosing power without calculating actual needs;
- installing the unit on a fragile surface without adequate anchoring;
- improperly managing the condensation drain slope;
- placing the outdoor unit too close to a neighbor or an obstruction;
- using improperly protected or sized piping;
- ignoring future access for HVAC maintenance.
In this project in Candiac, our team avoided these pitfalls by validating the location, clearances, mounting, technical routing, and air distribution logic before finalizing the installation.
Why maintenance remains essential after installation
Even an excellent FUJITSU heat pump needs to be maintained to preserve its performance. Filters must be cleaned regularly, the indoor unit must be inspected, the drain must remain clear, and the outdoor unit must be free of snow, leaves, ice, or debris.
Good HVAC maintenance helps maintain:
- better air quality;
- more stable electrical consumption;
- optimal heating performance;
- extended lifespan;
- reduced noise level;
- better prevention of water leaks or drain blockages.
For homeowners in Montreal, Laval, Longueuil, Candiac, the North Shore and the South Shore, annual or seasonal maintenance is highly recommended, especially when the unit is used for both heating and cooling.
A Customer Experience Focused on Transparency
At AirGreen, we believe that a good installation doesn't start on the day of work, but from the initial assessment. Before recommending a machine, we analyze the actual building configuration, client expectations, electrical constraints, the feasibility of pipe routing, and placement options for both indoor and outdoor units.
For this project, the client wanted a reliable, quiet, and neatly integrated solution. We proposed the FUJITSU ORION XLTH KZAH R-32 18,000 BTU because it precisely met these criteria. The goal was not just to install a machine, but to sustainably improve the home's comfort.
Our refrigeration technicians carried out the installation with care, taking into account the visible constraints on site: proximity to the window, tiled wall finish, available space, visual alignment, and future accessibility. The result is a simple, functional installation adapted to the room's reality.
A wall-mounted heat pump that suits South Shore homes well
Candiac is one of those sectors on the South Shore where various types of residences can be found: single-family homes, semi-detached houses, condos, extensions, insulated verandas, renovated open-plan areas. In many of these buildings, a wall-mounted mini-split heat pump represents an effective solution for improving comfort without having to modify the entire existing heating system.
The FUJITSU ORION XLTH 18,000 BTU is particularly suitable for homeowners looking for:
- efficient heating in winter;
- effective air conditioning in summer;
- a quiet solution;
- good potential eligibility for subsidies;
- a modern R-32 appliance;
- integrated WiFi control;
- a brand known for its reliability;
- a clean and durable installation.
This project in Candiac clearly illustrates how a well-chosen, well-positioned, and well-installed appliance can transform the comfort of a space without excessive work.
What this achievement demonstrates about the AirGreen approach
This installation highlights an essential principle: the quality of an HVAC system depends as much on the appliance as on the installation. A high-performance wall-mounted heat pump can yield disappointing results if it is poorly placed, incorrectly sized, or improperly installed. Conversely, when a model like the FUJITSU ORION XLTH is installed rigorously, it can provide remarkable comfort for many years.
At AirGreen, we regularly work in Montreal, Laval, Longueuil, on the North Shore and South Shore for similar projects. Each building has its unique characteristics. Some require a very discreet installation on the back facade, others need complex piping, special outdoor support, particular attention to noise, or integration into a renovated room. Our role is to find the best technical solution without neglecting aesthetics, durability, and the client's daily experience.
In the case of this installation in Candiac, the final result perfectly matches the desired objective: a FUJITSU ORION XLTH 18,000 BTU heat pump that is well-integrated, quiet, efficient, and ready to face Quebec's typical temperature fluctuations.
A complete solution to heat, cool, and better control your comfort
For a homeowner comparing different options for wall-mounted air conditioners, wall-mounted heat pumps, or mini-splits in Candiac, this project offers a concrete example of what to look for: a reliable appliance, well-chosen power, professional installation, and genuine attention to detail.
The FUJITSU ORION XLTH KZAH R-32 18,000 BTU installed here offers a very attractive combination: high energy efficiency, heating down to -26 °C, quiet operation, integrated WiFi, R-32 refrigerant, potential eligibility for the LogisVert subsidy, and a solid warranty when conditions are met.
For homeowners in Candiac and throughout the South Shore, this achievement confirms that a well-planned installation can improve comfort, reduce dependence on traditional heating systems, and provide a reliable solution for all seasons.
The job tools
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.
How the job unfolds
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 we check on a job like this one
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.
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.
Good habits, once the unit is in place
Six simple habits that keep the unit going. Your list stays on this device.
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.
The right pages, at the right time
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).