Installation of a FUJITSU ORION XLTH KZAH R-32 18,000 BTU wall-mounted heat pump in Varennes
AirGreen installs a FUJITSU ORION XLTH 18,000 BTU R-32 wall-mounted heat pump in Varennes, performing down to -26°C, quiet, eligible for LogisVert, and ideal for residential comfort on the South Shore.
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 Compact and Efficient Wall-Mounted Installation in a Varennes Residence
In this project carried out in Varennes, our AirGreen team installed a FUJITSU ORION XLTH KZAH R-32 18,000 BTU wall-mounted heat pump, an HVAC system designed to offer excellent performance in both heating and cooling, even when winter temperatures become particularly demanding on the South Shore. The choice of this model was particularly relevant for this residence, where the main objective was to achieve stable comfort, good air distribution, and a durable solution capable of effectively replacing the intensive use of traditional electric heating in the main rooms.
The photo of this installation shows a Fujitsu indoor unit installed high up, near the ceiling, in a space where the wall configuration required a precise approach. The unit is placed on a wall section that allows for good airflow into the room, while maintaining a clean and discreet integration. The positioning of the indoor unit is an often-underestimated element in an HVAC installation: a high-performing device placed incorrectly can create cold spots, uncomfortable drafts, or reduced efficiency. In this case, the location was chosen to maximize air circulation, avoid direct obstacles, and provide a harmonious visual finish.
The FUJITSU ORION XLTH 18,000 BTU is an excellent choice for properties in Varennes, Boucherville, Longueuil, Sainte-Julie, and several other sectors on the South Shore, where single-family homes, condos, and plexes often require a robust, quiet, and well-adapted appliance to Quebec's temperature variations.
Why a FUJITSU ORION XLTH 18,000 BTU for this project in Varennes?
The client was looking for a solution capable of ensuring reliable year-round comfort. For a main living area, an open space, or a significant section of a dwelling, an 18,000 BTU capacity can cover a larger volume of air than a lower-power model, while maintaining efficient modulation thanks to Inverter technology.
This model stands out for several important features:
- Cooling Capacity: 18,000 BTU
- Heating Capacity down to -26 °C
- Refrigerant R-32
- WiFi included
- ENERGY STAR® Certified
- ENERGY STAR® Cold Climate Certified
- Indoor unit number: ASUH18KZAS
- Outdoor unit number: AOUH18KZAH1
- AHRI: 215647921
- Indoor sound level: approximately 30 to 46 dB(A)
- Outdoor sound level: approximately 50 dB(A)
- Piping: 3/8 – 5/8 in
- Power supply: 220V
- MCA: 20A
- MOP: 20A
- Warranty: 12 years compressor, 12 years parts, 0 years labor, with possibility of additional warranty depending on available options
For a residence located in Varennes, this combination of performance, quiet operation, and energy efficiency is very advantageous. The city is in an area where winters can be cold and windy, while summers are humid. A wall-mounted heat pump must therefore be able to meet two opposing needs: efficient heating during cold periods and precise cooling during hot spells.
An indoor installation that required precision and method
The indoor unit visible in the photo was installed very close to the ceiling, on a wall surface where space had to be used intelligently. This type of configuration requires particular attention, as a wall-mounted heat pump should not simply be hung on the wall: it must be installed with the correct clearances, level, a well-designed condensation drain, and a clean piping path.
Our refrigeration technicians first validated the exact location of the indoor unit. Several elements were checked before installation:
- the available height below the ceiling;
- the solidity of the wall surface;
- the possible path of the refrigerant lines;
- the necessary slope for condensate drainage;
- the throw of the airflow towards the occupied area;
- proximity to openings, doors, and obstacles;
- the visual impact of the completed installation.
In this project, the presence of a visible wall opening nearby and the ceiling height required careful execution. A wall unit installed too low would have reduced the quality of air distribution. Too close to an obstacle, it could have created less optimal air return. The objective was therefore to find the right balance between performance, aesthetics, and building constraints.
The final result is a simple, clean, and functional installation: the wall unit is well aligned, the air vanes have adequate clearance, and the unit can distribute air efficiently throughout the room.
The importance of location choice for a wall-mounted heat pump
In a wall-mounted air conditioner installation or wall-mounted heat pump installation, the location of the indoor unit directly influences daily comfort. A quality model like the FUJITSU ORION XLTH can offer remarkable performance, but only if its installation complies with basic industry rules.
In Varennes, as in many homes on the South Shore, interior configurations can vary enormously: lower ceilings in certain rooms, load-bearing walls, divisions added over the years, old openings, finished basements, extensions, condos with co-ownership constraints. That's why we avoid hasty or standardized installations.
In this project, the indoor unit was placed to favor:
- good intake of ambient air;
- airflow directed towards the main area;
- a reduction of direct drafts towards occupants;
- a clean appearance in the room;
- reasonable access for future maintenance;
- efficient humidity management in cooling mode.
A successful HVAC installation is never limited to the power of the unit. It also relies on the analysis of the room, usage habits, air direction, and the durability of every technical detail.
A wall-mounted heat pump designed for Quebec winters
The FUJITSU ORION XLTH KZAH R-32 18,000 BTU is among the wall-mounted models highly adapted to Quebec's climatic conditions. Its heating capacity down to -26 °C represents a major asset for owners who wish to reduce the use of electric baseboards or improve comfort in the main areas of their residence.
In Varennes, homes can be exposed to cold winds, especially in more open areas or near the river. A standard heat pump can sometimes show its limitations during severe cold, whereas an XLTH type model is designed to maintain better heating capacity when the outdoor temperature drops sharply.
Very interesting energy performance
This model shows solid performance for an 18,000 BTU wall-mounted unit:
- SEER2: 25.5
- HSPF2: 12.5
- EER2: 14.0
- COP at -8 °C: 2.83
- Power at -8 °C: 13,600 BTU
- Power at -15 °C: 24,800 BTU
- Nominal Capacity: 18,000 BTU
This data is important for homeowners comparing different models. The SEER2 indicates seasonal cooling efficiency, while the HSPF2 gives an idea of heating performance. For a residence in Greater Montreal, in Laval, Longueuil, on the North Shore or South Shore, heating often represents the largest portion of annual usage. It is therefore essential to choose an appliance that performs well in heating mode, and not just an efficient air conditioner in summer.
Inverter technology allows the heat pump to modulate its power rather than simply operating in on-off cycles. This modulation improves comfort, limits sudden temperature variations, and can contribute to more reasonable electricity consumption.
A quiet appliance, suitable for living spaces
The sound level is an essential criterion in choosing a wall-mounted heat pump. An appliance can be high-performing, but if it becomes too noticeable in the living room, kitchen, or a bedroom, the client's experience can quickly deteriorate.
The FUJITSU ORION XLTH offers an indoor sound level of approximately 30 dB(A) at low speed, allowing for comfortable daily use. In this Varennes installation, the indoor unit was positioned to provide good airflow without creating direct noise disturbance. The client can thus use the system for heating or cooling without the appliance becoming disruptive in the room.
The outdoor unit, with a sound level of approximately 50 dB(A), also remains suitable for residential environments. This is an important point on the South Shore, where side yards, balconies, and neighboring properties can sometimes be close to each other. A professional installation considers not only the owner's comfort but also that of the neighborhood.
R-32: A modern refrigerant for a sustainable installation
The FUJITSU ORION XLTH KZAH uses R-32 refrigerant, a more modern choice than older refrigerants used in many older appliances. R-32 allows for good energy efficiency while contributing to an industry transition towards solutions with lower environmental impact.
For a Varennes homeowner investing in a new HVAC installation, choosing an R-32 appliance represents a more sustainable decision. This allows for installing a system aligned with recent standards, while enjoying high performance in both heating and cooling.
An advantageous LogisVert subsidy
This wall-mounted heat pump is eligible for a provincial LogisVert subsidy of $1,632, subject to current criteria and project eligibility. For an owner, this financial aid can significantly reduce the net cost of installation.
At AirGreen, we pay particular attention to eligible models, AHRI numbers, required documents, and necessary information to facilitate the process. In this specific case, the installed model has a clearly identified AHRI number: 215647921. This information is important because subsidy programs generally require a precise match between the indoor unit, outdoor unit, and declared performance.
Technical challenges encountered during this type of installation
Even when the installation seems simple at first glance, several details can influence the final quality of the work. In an existing residence, it is necessary to work with the building's structure, electrical constraints, interior finishing, line routing, and optimal positioning of the outdoor unit.
For this installation in Varennes, the main points of vigilance were the following:
Indoor clearance
The indoor unit had to be installed high up, near the ceiling, without hindering air intake or vane opening. Incorrectly calculated clearance can reduce the unit's efficiency or complicate maintenance.
Wall finish
The installation had to remain visually clean, especially in a living area. The positioning of the wall bracket, drilling, line routing, and final adjustment were carried out carefully to avoid an improvised appearance.
Condensate drainage
In cooling mode, a wall-mounted heat pump removes humidity from the air. This water must be drained reliably. An incorrect slope or poorly designed drainage can lead to backflow, drips, or long-term damage. Our teams systematically check this point before finalizing an installation.
Electrical compatibility
The model requires a 220V power supply with a minimum circuit ampacity of 20A and a maximum protection of 20A. Adequate electrical verification is therefore essential to ensure system compliance and safety.
Mistakes to Avoid When Choosing a Wall-Mounted Heat Pump
Many homeowners only compare the price or the number of BTUs before choosing their unit. This is a common mistake. An 18,000 BTU wall-mounted heat pump might be ideal in some contexts, but too large or ill-suited in others. Sizing must take into account several factors:
- actual area to be treated;
- building insulation;
- ceiling height;
- sun orientation;
- number of windows;
- interior partitioning;
- heating habits;
- presence of other heat sources;
- desired comfort level;
- possible location of the indoor and outdoor unit.
A unit that is too small will run at full capacity too often. A unit that is too large can create less efficient cycles, less stable dehumidification in summer, and less uniform comfort. This is why AirGreen always recommends a thorough analysis before installation.
Why Varennes Homeowners Choose AirGreen
This achievement perfectly illustrates our approach: we don't just install a unit, we design a solution tailored to the building. Each heat pump, wall-mounted air conditioner, or HVAC system project is treated according to the actual constraints of the location.
For customers in Varennes, Longueuil, Boucherville, Sainte-Julie, Montreal, Laval, the North Shore, and the South Shore, our advantage is based on several elements:
- concrete knowledge of Quebec residential buildings;
- extensive experience with Fujitsu models;
- particular attention to location selection;
- clean and compliant installation;
- good understanding of available subsidies;
- structured after-sales service;
- realistic advice on use and maintenance.
We know that a wall-mounted heat pump is a significant investment. It must operate efficiently for many years, provide constant comfort, and remain simple for occupants to use.
Tips for use after installation
After installing a FUJITSU ORION XLTH 18,000 BTU, a few best practices can help achieve better performance:
Maintain a stable temperature
It is often more efficient to maintain a stable setpoint rather than completely shutting off the unit and then asking it to catch up on a large temperature difference.
Clean filters regularly
The indoor unit filters must be cleaned periodically. Clogged filters reduce airflow, increase consumption, and can affect comfort.
Do not block the airflow
Tall furniture, curtains, or objects placed directly in front of the indoor unit can reduce air distribution. In this Varennes installation, the wall-mounted location allows for good diffusion, provided that the area in front of the unit remains clear.
Schedule HVAC maintenance
Professional HVAC maintenance helps preserve heat pump performance, checking the condition of coils, drainage, connections, and general operation. This is particularly important for units used year-round.
A project representative of our work on the South Shore
This installation in Varennes reflects the type of project we regularly carry out on the South Shore: an existing residence, a concrete need for comfort, a high-performance machine, and an installation that must integrate neatly into the available space.
The FUJITSU ORION XLTH KZAH R-32 18,000 BTU is particularly suited for customers who are looking for:
- efficient heating in winter;
- high-performance air conditioning in summer;
- quiet operation;
- good eligibility for subsidies;
- a durable appliance;
- a recognized brand;
- professional and careful installation.
For a homeowner who wishes to improve the comfort of a main living area, replace an old wall-mounted air conditioner, or reduce the use of electric baseboards, this model represents a very solid option.
An installation that combines comfort, efficiency, and a clean finish
The final result of this installation in Varennes is exactly what we aim for at AirGreen: a high-performance unit, well-positioned, aesthetically discreet, and adapted to the client's actual needs. The FUJITSU ORION XLTH 18,000 BTU wall-mounted heat pump offers a complete solution for heating and air conditioning, with operating capacity down to -26 °C, excellent seasonal efficiency, and simple management thanks to the included WiFi.
In Greater Montreal, in Montreal, Laval, Longueuil, on the North Shore, and the South Shore, homeowners are looking for HVAC solutions that can meet local realities: intense cold, summer humidity, energy costs, subsidies, noise, installation constraints, and durability. This achievement in Varennes demonstrates that with the right equipment and professional execution, it is possible to achieve superior comfort without compromising the aesthetics of the interior space.
At AirGreen, every installation is carried out with the same rigor: building analysis, selection of the right model, compliance with standards, clean finish, clear explanations to the client, and support for relevant procedures. This approach makes all the difference between a simple equipment installation and a true HVAC installation designed to last.
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 |
|---|---|---|---|---|---|---|---|
| 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 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.
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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).