In Sainte-Brigide-d’Iberville, a FUJITSU outdoor unit installed high up to handle the Quebec winter more intelligently
In this installation of a FUJITSU ORION XLTH+ in Sainte-Brigide-d’Iberville, the outdoor photograph tells much of the story of the work even before entering the house. The AIRSTAGE unit is securely installed on metal wall brackets, well above the ground, in front of a brick wall. The fan remains largely unobstructed, the electrical disconnect is installed just to the right of the unit, and the connections are neatly grouped around the equipment.
This arrangement is particularly relevant in the Montérégie region. For a heat pump intended to provide heating during the winter, the location of the outdoor unit matters almost as much as the figures listed on the technical data sheet. A system capable of operating at very low temperatures must also be installed so that it does not become buried in snow or trapped in an accumulation of ice after several defrost cycles.
This is precisely one of the interesting aspects of this AirGreen project in Sainte-Brigide-d’Iberville: here, the outdoor installation was designed with height, clearances, electrical supply, and integration with the building all considered together.
The FUJITSU AIRSTAGE ORION XLTH+ series is designed for heating in cold climates down to -30 °C (-22 °F). It uses R-32 refrigerant, an inverter compressor, and includes a base pan heater intended for extreme cold conditions. Fujitsu documentation presents the 09KTAP1, 12KTAP1, and 15KTAP1 configurations, all intended for the single-zone wall-mounted heat pump market for cold climates.
Why we raised the outdoor unit instead of leaving it close to the ground
The photo clearly shows that the outdoor unit rests neither directly on the ground nor on a small slab at ground level. It is installed on a wall-mounted structure that keeps it significantly higher.
This choice has several advantages in our climate.
In winter, the outdoor unit of a heat pump functions as a heat exchanger. Frost may form on the coil, which is normal. The system then periodically runs defrost cycles. The water generated during these cycles must be able to drain away.
If the unit is placed too low, this water can freeze beneath the machine and gradually form an accumulation of ice. Snow driven by the wind or deposited around the unit can also reduce the clearances required for airflow.
By installing the unit higher, we facilitate:
- clearance beneath the unit;
- snow management;
- drainage associated with defrost cycles;
- visual access during an inspection;
- future maintenance of the unit;
- airflow around the outdoor heat exchanger.
The height must, of course, be adapted to the building. A heat pump installed extremely high without a reason becomes more difficult to maintain. Here, the position visible in the photo provides a good compromise between winter protection and accessibility.
A brick wall requires suitable fastening
The exterior façade of this Sainte-Brigide-d’Iberville residence is made of brick.
Installing an outdoor unit weighing several dozen kilograms on wall brackets requires proper attachment to the structure. We do not treat this step as a purely aesthetic task.
Depending on the configuration of the ORION XLTH+ series, the documentation indicates an outdoor weight of approximately:
- 39 kg (86 lb) for the 09 version;
- 42 kg (93 lb) for the 12 version;
- 44 kg (97 lb) for the 15 version.
This weight is compounded by the normal vibrations produced by the compressor and fan. The support must therefore be stable, correctly positioned, and installed so that the unit remains level.
The photograph also shows support elements between the heat pump and its brackets. This type of detail contributes to a clean, well-structured outdoor installation.
An installation planned around the existing environment
This installation was not carried out in front of a completely blank wall.
Around the heat pump, we can see:
- existing vegetation;
- a nearby basement opening;
- a horizontal pipe mounted higher on the wall;
- a vertical architectural element behind the unit;
- the brick siding;
- the electrical disconnect located immediately to the right.
This meant that the heat pump’s position had to be chosen precisely.
In particular, we wanted to avoid lowering the unit in front of the lower opening while keeping the fan face in a clear area.
The vegetation around a heat pump also deserves special attention. The visible plants are located around the installation, but the large front fan remains largely unobstructed. This is important: a shrub that seems harmless during construction may grow and reduce airflow a few years later.
We therefore advise homeowners to regularly trim vegetation around an outdoor unit and never use the heat pump as a support for objects, gardening tools, or decorations.
An accessible electrical disconnect right next to the heat pump
The gray box visible on the wall, to the right of the unit, is one of the important practical details of this installation.
A heat pump must have an electrical supply that complies with the installed configuration, and the outdoor unit must be capable of being disconnected for service work in accordance with applicable requirements.
On this project, the visible electrical routing remains short and organized.
According to the Fujitsu specifications, the ORION XLTH+ systems in this series operate at 208 to 230 V, 60 Hz, single-phase. The documentation specifies a 15 A breaker for configuration 09 and a 20 A breaker for versions 12 and 15.
These are precisely the specifications that must be checked before planning the power supply. We never size a circuit simply because “other heat pumps usually use this type of breaker.” The exact model remains the reference.
The R-32 logo visible on the unit confirms a different generation of heat pumps.
A small marking R32 is clearly visible on the front of the outdoor unit photographed in Sainte-Brigide-d’Iberville.
The FUJITSU ORION XLTH+ does indeed operate with R-32.
In its documentation, Fujitsu compares a global warming potential of 675 for R-32 with 2088 for R-410A, representing a stated 68% reduction in GWP.
For the homeowner, the unit continues to operate like a conventional heat pump. For us, HVAC installers and technicians, however, the refrigerant type must be known from the beginning of the project, because the equipment, installation procedures, and service practices must correspond to the machine being installed.
A FUJITSU ORION XLTH+ designed to do much more than cool in summer
Heating down to -30°C: a particularly relevant feature in Sainte-Brigide-d’Iberville
For a property located in Montérégie, we do not select a heat pump solely based on its cooling capacity.
The most demanding need often arises in January or February.
Fujitsu specifies an operating range in heating mode of -30°C to 24°C for the three configurations in this series. The documentation also provides particularly interesting low-temperature capacity data.
At -30 °C, the maximum available capacity corresponds, according to Fujitsu, to:
- 113% of nominal capacity for the 09 version;
- 103% for the 12 version;
- 101% for the 15 version.
At -26 °C, these values reach 147%, 128%, and 116%, respectively.
This type of data is much more useful than a simple statement that a heat pump “works in cold weather.” It helps determine whether the unit actually maintains worthwhile capacity when temperatures become demanding.
Three ORION XLTH+ capacities for different residential needs
The series covered by Fujitsu’s data sheet includes three main configurations.
FUJITSU ORION XLTH+ 09KTAP1
The 09 version features:
- 9,000 nominal BTU/h in cooling;
- a range of 3,100 to 15,200 BTU/h in cooling;
- 12,000 nominal BTU/h in heating;
- a range of 3,300 to 24,000 BTU/h in heating;
- a TRÈS2 rated at 33,5;
- a Region V CPSC2 rated at 11,5;
- a TRE2 rated at 19,1.
FUJITSU ORION XLTH+ 12KTAP1
The 12 configuration offers:
- 12,000 nominal BTU/h in cooling;
- up to 17,300 BTU/h in cooling;
- 15,300 nominal BTU/h in heating;
- up to 27,300 BTU/h in heating;
- a TRÈS2 rated at 31,5;
- a Region V CPSC2 rated at 11,3;
- a TRE2 rated at 16,7.
FUJITSU ORION XLTH+ 15KTAP1
Finally, the 15 version is rated for:
- 14,500 nominal BTU/h in cooling;
- up to 19,400 BTU/h in cooling;
- 17,400 nominal BTU/h in heating;
- up to 28,000 BTU/h in heating;
- a TRÈS2 rated at 28,7;
- a Region V CPSC2 rated at 10,7;
- a TRE2 rated at 15,4.
The three configurations also appear with the ENERGY STAR ratings indicated in Fujitsu’s technical data sheet.
The photo of our installation confirms the FUJITSU AIRSTAGE family and the R-32 designation, but the complete nameplate number is not visible enough to determine with certainty which of these three capacities was installed. We therefore prefer to present the characteristics of the product line rather than arbitrarily assigning a BTU rating to this installation.
Why “more BTUs” does not automatically mean “better choice”
Sizing is one of the most important steps in any wall-mounted heat pump project.
An undersized unit may lack capacity when demand increases. An unnecessarily oversized unit is not automatically advantageous either.
We consider, among other things:
- the area to be served;
- insulation;
- the number and type of windows;
- the orientation of the house;
- ceiling height;
- the interior layout;
- the number of floors;
- air circulation between rooms;
- actual heating needs;
- the contribution of other heating systems.
A 1,000 sq. ft. house in Sainte-Brigide-d’Iberville that is very open and well insulated does not perform like a property of the same size divided into several small rooms and with greater heat loss.
This is why we avoid shortcuts such as “a certain number of square feet automatically equals a certain number of BTUs.”
The base pan heater and defrost management
The manufacturer specifies that the ORION XLTH+ outdoor unit includes a base pan heater designed for extremely cold climates.
This feature and the elevated installation visible in the photo form a particularly logical combination for our climate.
When the heat pump heats the house, the outdoor heat exchanger becomes cold and can accumulate frost. The system periodically reverses its cycle to defrost the coil.
This process generates water.
The water must be able to leave the machine without immediately turning into a block of ice that could eventually reach the bottom of the unit.
This is one of the reasons why we place so much importance on the height of the outdoor unit in Quebec.
The fan’s front must remain clear
The large circular fan is the dominant element in the photo.
Its role is essential: it moves a significant amount of air through the outdoor heat exchanger. If this airflow is compromised, system performance may suffer.
We therefore avoid placing the unit:
- against an immediate obstruction;
- behind an overly closed decorative screen;
- in the middle of dense shrubs;
- in an area where snow can completely block the fan;
- under a place where ice or water falls constantly.
On this project, the front of the heat pump is open to the outdoor space. Although plants are present at ground level, they do not currently block the unit’s main outlet.
To maintain this situation, minimal landscaping maintenance around the installation is recommended over the years.
Up to 20 metres of piping: useful when the ideal location is not directly behind the indoor unit
The ORION XLTH+ also offers interesting flexibility when it comes to refrigerant lines.
For the three models presented, Fujitsu specifies:
- minimum length: 3 m (10 ft);
- maximum length: 20 m (66 ft);
- maximum vertical difference: 14.9 m (49 ft);
- liquid line: 1/4 po;
- gas line: 3/8 po.
This provides more options when the ideal indoor unit is not located exactly on the other side of the wall where the outdoor unit should be installed.
In our projects in Montréal, Laval, Longueuil, on the North Shore and the South Shore, we regularly have to work around a terrace, a window, a service entrance, or a section of façade where installation would be impractical.
The piping flexibility helps, but it never eliminates the need to carefully plan the route.
A heat pump that is quiet indoors and relatively discreet outdoors
Sound comfort is another important aspect of this range.
The technical data sheet indicates an indoor sound level as low as 23 dB(A) for models 09 and 12 in quiet mode, and as low as 26 dB(A) for version 15.
Outdoors, the stated nominal values range from 44 to 51 dB(A) in cooling mode, depending on the configuration.
Nevertheless, the outdoor unit's position must be considered independently of these figures.
We look in particular at its proximity to:
- bedrooms;
- windows;
- decks;
- neighboring properties;
- walls that may reflect sound;
- structures to which vibrations may be transmitted.
A good installation therefore involves more than simply using a quiet machine: it must also be installed in the right location.
Inverter technology improves comfort modulation.
The ORION XLTH+ uses an Inverter compressor.
Unlike a system limited to “full-capacity operation” or “off,” the heat pump can modulate its output according to the building's demand.
When the indoor temperature is far from the setpoint, the system can increase its output. Once it only needs to maintain comfort, it can reduce its operating rate.
For a homeowner, this generally translates into a more stable temperature and less abrupt operation.
This modulation is particularly useful during the shoulder seasons in Montérégie, when the house does not need the system's maximum capacity for several hours.
Inside: a compact unit operating at up to 23 dB
Although the photo of this project deliberately focuses on the outdoor unit, the indoor section of the ORION XLTH+ series also deserves mention.
For the wall-mounted unit, Fujitsu specifies:
- compact design;
- ProCore copper coils;
- multiple fan speeds;
- backlit remote control;
- quiet mode;
- automatic defrost function;
- automatic restart;
- minimal heat function;
- built-in Wi-Fi connectivity through the AIRSTAGE ecosystem.
The combination of a discreet indoor unit and an outdoor unit designed for low temperatures makes it possible to use the heat pump as a true four-season system rather than merely as a summer air-conditioning solution.
A neat outdoor installation also makes future servicing easier.
The job is not finished simply when the heat pump starts up.
We also think about the person who may eventually need to work on the system several years from now.
On the photographed installation, the advantages are clear: the unit is high enough not to be at ground level, yet it remains accessible. The service panel is on the right side, and the electrical disconnect is nearby.
For HVAC maintenance, an inspection, or a diagnostic, this accessibility can prevent a great deal of unnecessary work.
Conversely, a heat pump wedged between two walls, enclosed in a decorative structure, or installed behind dense vegetation can turn a relatively simple service call into a much longer operation.
A few mistakes we specifically aim to avoid when installing a heat pump
Our field experience leads us to watch for several recurring mistakes.
Installing the outdoor unit too close to the ground
In Quebec, this considerably increases the risk of interaction with snow and ice.
Neglecting future vegetation growth
A young shrub can become dense enough to disrupt airflow a few seasons later.
Choosing the location solely to shorten the lines
The refrigerant line route is important, but it should not dictate a poor location for the outdoor unit.
Forgetting access to the service panel
A heat pump will need maintenance sooner or later.
Automatically reusing the old piping
With an R-32 system, we check the diameters, the condition of the copper, and installation compliance before deciding whether anything can be kept.
Relying on the product name to determine the grant
Financial assistance programs are based on specific criteria and the exact combination of the indoor and outdoor models.
ENERGY STAR and grants: always confirm the exact installed pairing
FUJITSU documentation lists the 09KTAP1, 12KTAP1, and 15KTAP1 configurations with the ENERGY STAR classifications indicated by the manufacturer, including designations related to cold climates.
The technical pairings presented include, among others:
- ASUH09KTAS + AOUH09KTAP1;
- ASUH12KTAS + AOUH12KTAP1;
- ASUH15KTAS + AOUH15KTAP1.
This may be relevant when an installation is assessed for financial assistance applicable to efficient heat pumps.
However, we insist on one point: eligibility and the amount must be verified using the exact model and the program criteria in effect at the time of the project. We never recommend calculating a grant simply by seeing the FUJITSU logo or the ORION XLTH+ name.
This project in Sainte-Brigide-d’Iberville shows why the outdoor unit deserves just as much attention as the one installed in the living room.
Heat pump photos often highlight the indoor unit because it is the one the homeowner sees every day.
Yet, from a technical standpoint, the outdoor unit is just as important.
This is where the compressor, outdoor heat exchanger, fan, and many of the components required for heat transfer are located.
On this Sainte-Brigide-d’Iberville project, we see a FUJITSU unit installed on a brick wall, raised on brackets, with its electrical supply nearby and a largely unobstructed façade.
It may seem very simple after installation.
That is precisely the goal.
A good wall-mounted heat pump installation should not create complications around the house. It should take the existing building, snow, drainage, servicing, vegetation, and heating and cooling needs into account while leaving an orderly result.
Why this ORION XLTH+ represents a suitable solution for Montérégie
For a residence in Sainte-Brigide-d’Iberville, several features of this FUJITSU range are particularly relevant:
- heating down to -30 °C;
- Inverter compressor;
- R-32 refrigerant;
- base pan heater;
- high energy performance depending on capacity;
- indoor units capable of operating at very low sound levels;
- piping permitted up to 20 m;
- ENERGY STAR certifications indicated by Fujitsu;
- heating and cooling with a single system.
But these features only reach their full value if the system is properly sized and installed.
That is why, at AirGreen, we pay as much attention to the wall bracket shown in this photograph as we do to the performance ratings listed in the technical documentation.
A quality heat pump installed without considering snow, clearances, or service access remains an incomplete installation.
An AirGreen installation designed to remain practical after several winters
Our goal for this project was not simply to start up a FUJITSU ORION XLTH+.
We wanted an installation that would still make sense after a snowstorm, during a defrost cycle, when a technician needs to access the unit, and once the plants around the house have grown.
This is the longer-term vision we apply to our wall-mounted heat pump projects in Montréal, Laval, Longueuil, on the North Shore, the South Shore, and in Montérégie.
At Sainte-Brigide-d’Iberville, the visible result is very concrete: a well-cleared FUJITSU AIRSTAGE outdoor unit, elevated above the ground, cleanly installed against a brick façade and ready to serve during both summer heat and periods of intense cold.