Installation of a Fujitsu AIRSTAGE Orion XLTH wall-mounted heat pump in Saint-Clet, Vaudreuil-Soulanges
In Saint-Clet, AirGreen installs a Fujitsu AIRSTAGE Orion XLTH R32 wall-mounted heat pump on an elevated bracket, a configuration designed for cold-weather heating, defrosting, and the durability of the HVAC installation.
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.
In Saint-Clet, an installation designed to withstand Quebec winters without overlooking access, drainage, and durability
At Saint-Clet, this Fujitsu AIRSTAGE Orion XLTH wall-mounted heat pump installation clearly illustrates an aspect we consider essential at AirGreen: a good heat pump can only reach its full potential when its installation respects the building’s actual constraints. At this site, the outdoor unit is located in an environment where the available space, the proximity of other equipment, and exposure to precipitation required carefully considered placement.
The installation photo immediately shows several important elements. The Fujitsu AIRSTAGE outdoor unit is installed high on a metal bracket, which is itself positioned on two beams that help create a stable base on the granular surface. This configuration keeps the bottom of the heat pump clear of the ground and facilitates the drainage of water, particularly from defrost cycles. The R32 marking is also visible directly on the outdoor cabinet, along with the insulated routing of the refrigerant lines along the side of the unit.
These installation details are precisely what become so important when a cold-climate wall-mounted heat pump must operate for several years in Quebec conditions.
Why the Fujitsu Orion XLTH was particularly well suited to this type of project
The Fujitsu AIRSTAGE Orion XLTH belongs to Fujitsu’s H single-zone series. The technical documentation provided for this range covers the 09KZAH1, 12KZAH1, 15KZAH1, 18KZAH1 and 24KZAH1 models. This is a family of wall-mounted heat pumps using R32 refrigerant, designed to maintain heating down to an outdoor temperature of -26 °C.
For a property in Saint-Clet, the ability to continue heating at very low temperatures is far more relevant than a simple summer cooling rating. We always evaluate a heat pump by considering both extreme seasons: the hot, humid days of July, but especially the cold periods in January and February, when the unit must continue transferring heat efficiently.
Fujitsu also indicates that the Orion XLTH series uses an Inverter compressor, a base-pan heater designed for very cold climates, and a low-noise outdoor operating mode. The documentation also emphasizes that the outdoor unit retains a relatively compact design, which is useful when available space is limited.
A range of capacities that must be sized according to the building
A common mistake when replacing or adding a wall-mounted heat pump is choosing the capacity solely based on the home’s total area. At AirGreen, we also consider the room layout, heat loss, insulation, solar exposure, windows and doors, floors, and how air will actually circulate.
The Fujitsu specifications also show that the Orion XLTH series covers several rated cooling capacities:
- 09KZAH1: 9,000 BTU/h
- 12KZAH1: 12,000 BTU/h
- 15KZAH1: 14,500 BTU/h rated
- 18KZAH1: 18,000 BTU/h
- 24KZAH1: 22,000 BTU/h rated
The rated heating capacities are even higher, ranging from 12,000 BTU/h for the 09KZAH1 to 25,200 BTU/h for the 24KZAH1.
The photo from this installation does not show the rating plate closely enough for us to confirm the exact capacity of the installed unit based solely on the image. It would therefore be incorrect to arbitrarily assign a precise BTU rating to this installation. What we can confirm visually, however, is that it is indeed a Fujitsu AIRSTAGE R32 outdoor unit corresponding to the design of the series presented.
A telling example: the 12K model’s performance
To give an idea of the level of performance offered in this series, the 12KZAH1 model has a seasonal cooling rating of 30.5 TRÈS2/SEER2, a 10.1 regional V CPSC2, and a heating range down to -26°C. The model operates at 208–230 V, 60 Hz, single-phase, with a 15 A circuit breaker according to the technical specifications.
This model uses 1/4 in. liquid and 3/8 in. gas refrigerant piping, with a stated maximum length of 25 m, or 82 ft, and a maximum vertical difference of 20 m, or 66 ft.
These values show why it is important to work from the exact model number rather than assume that all Fujitsu heat pumps use the same piping or electrical supply.
A raised outdoor unit: a particularly important detail in Quebec
One of the most visible features of this installation in Saint-Clet is the height at which the outdoor unit was placed.
The heat pump rests on a metal support that keeps its cabinet well above the surrounding surface. This arrangement is particularly relevant for a heat pump used for heating because the outdoor unit produces water during its defrost cycles.
When this water freezes around a unit installed too close to the ground, a significant buildup of ice can gradually form beneath the unit. The space available under the heat pump therefore helps the water drain away instead of quickly creating a block of ice in contact with the cabinet.
The Fujitsu documentation also specifies that this series has a base pan heater designed for extremely cold climate regions. The base pan heater and a properly clear outdoor installation serve different yet complementary functions: the former acts on the unit, while the latter helps manage the physical conditions around it.
An installation that takes the immediate surroundings into account
In the job-site photo, the space around the heat pump is not completely clear. A structure is located on the left, while other technical elements are present on the right.
In this type of situation, we need to pay attention to three aspects: air circulation, access for servicing, and the routing of the piping.
An outdoor unit must be able to draw in and discharge air without being enclosed in an overly restrictive space. In particular, the area in front of the fan must remain unobstructed. The location must also allow a technician to access the unit later for diagnosis, cleaning, repair, or HVAC maintenance.
This is an aspect that is sometimes overlooked when an installation is carried out in a tight space: a position that seems acceptable on the day of installation can become extremely problematic when a component needs to be replaced a few years later.
The routing of the refrigerant lines: an invisible part of performance
To the right of the outdoor unit, we can see in the photo the lines leading to the heat pump. The refrigerant lines are insulated to limit unwanted heat gain or loss and protect the operation of the circuit.
The Orion XLTH series does not use a single piping size for all its capacities. According to the Fujitsu specifications:
- the 09K and 12K models use 1/4 in. liquid and 3/8 in. gas lines;
- the 15K model uses 1/4 in. liquid and 1/2 in. gas lines;
- the 18K and 24K models use 3/8 in. liquid and 5/8 in. gas lines.
That is why we always verify the specifications of the exact model before an installation or replacement. Automatically reusing old piping simply because it is already in place can lead to incompatibility with the new heat pump.
What this Fujitsu Orion XLTH installation in Saint-Clet shows about a well-planned HVAC installation
R32 also changes some installation practices
The R32 logo visible on the outdoor unit is not merely an aesthetic detail. Fujitsu adopted this refrigerant in part to reduce the climate impact associated with the refrigerant. According to its documentation, R32 has an announced global warming potential of 675, compared with 2,088 for R410A, which Fujitsu presents as a 68% reduction.
For the homeowner, however, the main benefit remains having a modern system whose entire installation—the equipment, connections, commissioning, and refrigerant charge—is handled according to the manufacturer’s specifications.
A professional installation therefore involves much more than simply mounting an indoor unit and an outdoor unit. In particular, we must properly complete the refrigerant connections, work with a clean circuit, carry out the appropriate evacuation procedures, and verify the equipment’s operation after commissioning.
Indoor comfort is about more than the number of BTUs
The Orion XLTH line is designed with Inverter modulation, allowing the compressor to adjust its operation rather than working only in on-off cycles. Fujitsu presents this technology as a way to achieve rapid temperature adjustment and more consistent comfort.
The indoor unit offers several fan speeds as well as a quiet mode. On the 09K and 12K models, the specifications indicate an indoor sound level as low as 23 dB(A) in quiet mode. Depending on the capacity, the outdoor unit's sound level ranges from 46 to 50 dB(A) according to the published data.
For a homeowner comparing several wall-mounted heat pumps in Montreal, Laval, Longueuil, on the North Shore, South Shore, or in Vaudreuil-Soulanges, this information is often more useful than a comparison based solely on the purchase price.
Built-in Wi-Fi and more advanced control options
Fujitsu indicates built-in Wi-Fi connectivity with the option of remote monitoring through the AIRSTAGE mobile app. The platform also supports several optional accessories and interfaces, including wired controllers, 24 V interfaces, and BACnet or Modbus integration options for certain more advanced applications.
For a typical residential installation in Saint-Clet, the mobile app is generally the most directly useful feature. It allows the system to be managed without having to be in front of the indoor unit.
Hydro-Québec subsidy: verify the exact combination before promising an amount
The Fujitsu Orion XLTH heat pump belongs to a family for which certain combinations appear on Hydro-Québec's published lists of eligible heat pumps. However, the applicable amount depends on the exact combination of the indoor and outdoor units, performance at -8 °C, and installation date. Hydro-Québec specifies that its lists and amounts may change and that the list in effect at the time of installation prevails.
In 2026, the residential LogisVert program provides, among other things, assistance of $120 per 1,000 BTU/h at -8 °C for a cold-climate heat pump, while certain heat pumps meeting very high-efficiency criteria may qualify under a different rate schedule. Full eligibility must always be validated for the installation concerned.
At AirGreen, we therefore recommend never relying solely on an amount seen in an advertisement several months earlier. We verify the outdoor model, indoor model, and eligibility data corresponding to the work period.
Mistakes we seek to avoid when installing a wall-mounted heat pump
A quality heat pump can lose much of its value if installation details are neglected. On our HVAC projects in Montreal and the Greater Montreal Area, we pay particular attention to avoiding the following mistakes:
- Installing the outdoor unit too close to the ground, without properly planning for snow, ice, and defrost water.
- Choosing the capacity solely based on floor area, without considering the home’s actual characteristics.
- Reusing existing lines without confirming their dimensions and condition.
- Placing the outdoor unit in an overly enclosed space, which can compromise airflow.
- Neglecting future access for maintenance and troubleshooting.
- Using electrical protection that does not comply with the exact model’s requirements.
- Choosing the indoor location solely for aesthetic reasons, without considering the actual distribution of the air.
Our role is not limited to supplying a Fujitsu heat pump. We must adapt the installation to the building so that the equipment can actually operate as intended by its manufacturer.
Why this Saint-Clet installation reflects our approach
This installation illustrates something very concrete: the success of an HVAC project often depends on decisions that may appear minor on a quote.
The elevated support, the unit’s position, the routing of the lines, management of the surrounding space, and future accessibility all affect the quality of the result.
The Fujitsu AIRSTAGE Orion XLTH, for its part, offers several features suited to our climate: heating down to -26 °C, Inverter technology, R32 refrigerant, ENERGY STAR certification indicated for models in the series, a base pan heater, quiet operation, and several capacity options.
For us at AirGreen, a successful heat pump installation in Saint-Clet, Montreal, Laval, Longueuil, on the North Shore or the South Shore always begins the same way: selecting the right capacity, determining the appropriate location, and installing every component with the conditions the unit will actually face during Quebec winters in mind.
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.
And at your place?
Two quick checks with real numbers: what heat costs, and what your current heaters add up to in BTU/h.
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.
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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).