In Chambly, a FUJITSU installation adapted to a metal ceiling and an unconventional interior structure
This FUJITSU AIRSTAGE ORION XLTH wall-mounted heat pump installation+ in Chambly immediately stands out from conventional residential installations. The jobsite photo shows an indoor unit installed very high on a wall, directly beneath a ribbed metal ceiling, in close proximity to a major structural beam.
For our team at AirGreen, this type of configuration completely changes how we approach heat pump placement. We are not working in front of a completely unobstructed wall with a uniform drywall ceiling. Here, we have to work around the existing structure, find a suitable mounting area, maintain the necessary clearances around the unit, and above all ensure that the beam or ceiling geometry does not interfere with air intake and distribution.
The visible result is particularly compact: the FUJITSU AIRSTAGE occupies a section of wall that would otherwise have very little practical use, while keeping its airflow outlet directed toward the occupied space. The positioning also preserves the lower wall area, which is a valuable advantage in spaces where every section of wall may be used for storage, furniture, or equipment.
This project in Chambly clearly illustrates our HVAC installation philosophy: we are not simply looking for a place where the heat pump can be mounted. We are looking for the location where it can truly operate properly, remain accessible, and integrate with the building.
The first challenge: working with a metal ceiling rather than a conventional residential ceiling
The ceiling visible in the photo is made of ribbed metal panels. A structural beam also extends down a few centimetres from the right side of the unit.
In this context, the available space for a wall-mounted heat pump is defined by the structure itself.
Before installation, we therefore need to consider several factors:
- the actual available height;
- the ability to properly draw in air through the top of the unit;
- the distance between the unit and the beam;
- refrigerant line routing;
- condensate drainage;
- airflow direction;
- future access to the filters and internal components.
A unit may physically fit in a space without that location necessarily being suitable. That is precisely the difference between a simple installation and a professional HVAC installation.
A high installation to preserve usable space
The heat pump is installed near the ceiling, which offers an obvious advantage in an environment like this: it takes up virtually none of the functional space.
The ORION XLTH+ indoor unit measures approximately 894 mm wide, 295 mm high, and 280 mm deep, according to the FUJITSU technical data sheet. These dimensions are common to all three capacities in the series presented in the documentation.
This relatively compact format gives us more flexibility in projects where the available height or width is limited.
At the Chambly job site, a few extra centimeters could have seriously complicated the integration between the metal ceiling and the beam. These are precisely the situations in which the model selection and site assessment must be carried out together.
The beam to the right of the unit: an obstruction to consider before drilling
In the photo, a vertical beam descends close to the right side of the heat pump.
This detail may seem minor, but it influences several decisions.
We must prevent a structural element from obstructing:
- opening the unit during maintenance;
- access to the components;
- proper air circulation;
- the passage of the lines;
- future diagnostic or cleaning work.
A common mistake is to maximize the available space to the point of installing the unit too close to a permanent obstruction. The installation may look compact on the first day, but it becomes problematic when a technician needs to access the equipment a few years later.
At AirGreen, we try to account for these requirements from the initial installation.
An interesting detail on the front panel: the presence of a visible sensor
The photo also shows, on the lower right side of the indoor unit, a small circular element integrated into the front panel.
FUJITSU documentation for the ORION XLTH+ series specifically mentions an occupancy mode among the available operating modes.
In spaces where occupancy periods may vary, automatic management functions become particularly useful. They make it possible to use the heat pump in a way that better reflects the space’s actual usage patterns, rather than unnecessarily maintaining the same settings at all times.
FUJITSU ORION XLTH+: a heat pump designed for Quebec’s cold climate
The choice of the FUJITSU AIRSTAGE ORION XLTH+ is particularly relevant in Chambly because of its low-temperature heating capacity.
According to the manufacturer’s documentation, the series is designed to operate in heating mode down to -30 °C (-22 °F). FUJITSU also indicates the presence of a base pan heater designed for extremely cold climates, as well as an Inverter technology compressor.
In our region, it is not enough for a heat pump to be efficient at cooling.
A residence or commercial space in Chambly, Longueuil, or elsewhere on the South Shore may experience periods of sustained cold. When a homeowner plans to use their system as a true heating source for much of the winter, we therefore examine its low-temperature capabilities very carefully.
Three capacities available in the ORION XLTH+ range
The FUJITSU product sheet presents three main configurations.
09KTAP1
This combination offers:
- 9,000 BTU/h nominal cooling capacity;
- 12,000 BTU/h nominal heating capacity;
- a cooling range from 3,100 to 15,200 BTU/h;
- a heating range from 3,300 to 24,000 BTU/h.
12KTAP1
This version offers:
- 12,000 BTU/h nominal cooling capacity;
- 15,300 BTU/h nominal heating capacity;
- a cooling range of up to 17,300 BTU/h;
- a maximum heating capacity of up to 27,300 BTU/h.
15KTAP1
The largest model in this product sheet offers:
- 14,500 BTU/h nominal cooling capacity;
- 17,400 BTU/h nominal heating capacity;
- a maximum cooling range of up to 19,400 BTU/h;
- a maximum heating capacity of up to 28,000 BTU/h.
The construction-site photo does not allow us to reliably read the unit’s exact model number. We therefore avoid artificially assigning a specific capacity to this installation based solely on its exterior appearance.
The indoor units in these three capacities also use the same cabinet format, making visual identification unreliable.
Why the right number of BTUs depends on the building
When choosing between these capacities, we never rely solely on the stated area.
A space with a high ceiling and a metal structure can have thermal behavior that differs significantly from that of a conventional residential room of the same size.
We take the following into account, among other factors:
- interior height;
- type of insulation;
- glazed surface area;
- number of walls facing the outside;
- air infiltration;
- solar exposure;
- actual use of the space;
- number of occupants;
- equipment capable of producing heat;
- heating requirements in very low temperatures.
This approach is particularly important in a project like the one in Chambly, where the visible environment clearly shows construction that differs from a standard residential room.
Heating performance remains high below -20 °C
FUJITSU documentation provides particularly interesting data on maximum capacity at low temperatures.
At -26 °C, the manufacturer indicates a maximum heating percentage corresponding to:
- 147% of the nominal capacity for the 09KTAP1;
- 128% for the 12KTAP1;
- 116% for the 15KTAP1.
Even at -30 °C, the stated values are 113%, 103%, and 101%, respectively, according to the reference conditions specified by FUJITSU.
These figures illustrate why the ORION XLTH+ is positioned as a cold-climate heat pump.
However, they do not replace building sizing. The actual required capacity must always be compared with the heat losses of the space being served.
High seasonal efficiency
The series also delivers impressive cooling and heating efficiency.
According to the technical data sheet:
- the 09KTAP1 reaches a SEER2 of 33.5 and an HSPF2 Region V of 11.5;
- the 12KTAP1 reaches a SEER2 of 31.5 and an HSPF2 Region V of 11.3;
- the 15KTAP1 has a SEER2 of 28.7 and an HSPF2 Region V of 10.7.
For our clients in Chambly, Montreal, Laval, Longueuil, the North Shore and the South Shore, these figures make it possible to compare several heat pumps beyond the purchase price alone.
Seasonal efficiency can have a considerable influence on the system’s total operating cost over the years.
Inverter technology: particularly useful in spaces with variable loads
The ORION XLTH+ heat pump uses an Inverter compressor, allowing it to adapt its operation to demand.
Instead of constantly operating at full power and then shutting down completely, the system can modulate its output more extensively.
In a space where occupancy and heat gains can change throughout the day, this modulation capability is particularly relevant.
When demand decreases, the unit can operate at a reduced output. When demand increases, it can gradually ramp up.
The desired result is a more stable temperature and more comfortable operation.
Airflow suited to different needs
FUJITSU specifies six fan speeds plus automatic mode for the ORION XLTH+ range.
Depending on the model, the maximum cooling airflow ranges from 483 to 547 CFM. In quiet mode, the airflow is reduced to further limit noise.
This point is particularly important in our Chambly installation.
Because the unit is positioned high on the wall, its louver can use this position to direct air toward the occupied part of the space. A unit installed too low or poorly oriented could have created a much less even distribution.
Up to 23 dB(A) indoors
Sound level is often associated with bedrooms and living rooms, but it also matters in offices, workshops, and professional spaces.
FUJITSU documentation indicates an indoor sound level as low as 23 dB(A) for the 09KTAP1 and 12KTAP1 models in quiet mode. The 15KTAP1 is rated at 26 dB(A).
A quiet heat pump helps maintain comfort without unnecessarily adding to ambient noise.
Obviously, the perceived result also depends on the room’s acoustics. A metal ceiling and hard surfaces may reflect sound differently from an environment with carpeting, curtains, and upholstered furniture.
The choice of location therefore remains important, even with an appliance known for being quiet.
Copper ProCore coils
FUJITSU also indicates that the indoor unit uses highly corrosion-resistant copper ProCore coils.
In a heat pump, the indoor coil operates in both heating and cooling modes. During the summer season, it is also exposed to the moisture produced by condensation.
The quality of the coil must therefore be accompanied by proper maintenance.
In particular, we recommend keeping the filters clean and scheduling professional HVAC maintenance when the coil, blower wheel, or drainage system requires deep cleaning.
R-32: the refrigerant used by this ORION XLTH+ generation
The series operates with R-32 refrigerant.
FUJITSU specifies a global warming potential of 675 for this refrigerant, compared with 2,088 for R-410A. The documentation presents this difference as a 68% reduction in GWP.
For installation, this generational change is significant.
Our technicians must follow procedures suited to the refrigerant used and the machine’s specific characteristics.
Simply connecting two pipes and powering the system is never enough. Line preparation, leak-tightness, evacuation, commissioning, and final checks are all integral parts of the work.
1/4 in. and 3/8 in. refrigerant lines
FUJITSU specifies the same piping dimensions for the three capacities presented:
- 1/4 in. for the liquid line;
- 3/8 in. for the gas line.
The minimum length is 10 feet, while the maximum length can reach 66 feet, with a maximum vertical difference of 49 feet.
This flexibility facilitates certain complex projects, especially when the outdoor unit cannot be placed directly behind the indoor unit.
Even so, we generally favor a logical, well-planned route rather than unnecessarily using the full permitted length.
This project in Chambly shows how to adapt an HVAC installation to the building’s actual architecture
Never choose the location solely because a wall is available
One of the most useful lessons from this project is that the best wall is not always the one that seems simplest at first glance.
For this installation, we had to work around:
- a metal ceiling;
- a structural beam very close by;
- a relatively narrow upper area;
- the need to maintain unobstructed airflow.
The final positioning makes intelligent use of this space without taking up a large wall area.
Maintenance access must be anticipated
Even an excellent heat pump will require maintenance.
FUJITSU specifies washable filters for this range.
We must therefore install the unit in a way that allows them to be removed. In the longer term, a technician may also need access to the coil, fan, drainage system, or electronic components.
A very tight installation that makes these operations nearly impossible can turn a simple service call into a much more complex job.
Dehumidification matters as much as cooling
The ORION XLTH+ series also provides dehumidification.
The indicated capacity varies by model:
- 1.7 L/h for the 09KTAP1;
- 1.8 L/h for the 12KTAP1;
- 2.4 L/h for the 15KTAP1.
On humid summer days in Quebec, comfort depends heavily on indoor humidity.
That is also why we place great importance on drainage. An indoor unit that produces condensation must be able to discharge it reliably without the risk of backflow or leaks.
Built-in Wi-Fi and advanced control options
The documentation also presents built-in Wi-Fi connectivity, allowing remote monitoring and control through the AIRSTAGE mobile app.
In a space used irregularly, this option can be particularly convenient.
The system can also support several optional controllers and interfaces. FUJITSU specifically mentions solutions compatible with BACnet and Modbus, which may be relevant in certain more advanced building management applications.
ENERGY STAR and rebates: always validate the exact combination
The three systems presented in the FUJITSU documentation carry the ENERGY STAR classifications indicated in the specification sheet, including designations associated with cold climates.
For a homeowner or property manager evaluating heat pump rebates, this feature is worth considering.
However, actual eligibility depends on the program in effect and the exact combination of indoor and outdoor units.
We therefore recommend confirming the exact model before calculating the project’s net cost.
An Installation That Demonstrates the Importance of Custom Work
This FUJITSU ORION XLTH+ heat pump project in Chambly is not like a standard installation on a living room wall.
And that is precisely what makes it interesting.
The visible metal structure, the beam, the limited overhead space, and the building’s geometry required careful planning. We used an available area without sacrificing the main wall space, while keeping the front panel and airflow flap unobstructed.
This ability to adapt the installation to the building is fundamental to our work.
We work on projects every day in very different buildings: single-family homes, condos, plexes, commercial spaces, and areas with particular architectural constraints.
We therefore do not seek to replicate the same installation everywhere.
AirGreen for a FUJITSU installation in Chambly, Longueuil, and throughout the South Shore
At AirGreen, we carry out wall-mounted heat pump installations in Chambly, as well as in Longueuil and throughout the South Shore, and in Montreal, Laval, and throughout the North Shore.
For every project, we combine two elements: the system’s technical specifications and the building’s physical reality.
The FUJITSU AIRSTAGE ORION XLTH+ offers us several advantages here: heating down to -30 °C, Inverter technology, R-32 refrigerant, high seasonal efficiency, quiet operation, integrated Wi-Fi, and a relatively compact indoor unit.
However, these advantages can only be fully realized if the unit is properly sized and installed.
In this Chambly project, the real challenge was therefore to transform an unusual interior space into a functional location for a high-performance heat pump. The proximity of the metal ceiling and beam required precision, while the unit had to remain sufficiently accessible for maintenance and correctly positioned to distribute air.
This is the type of thinking we apply to every AirGreen HVAC installation: looking at the building as it really is, selecting the appropriate solution, and then carrying out an installation designed to perform just as well years from now as it does on the day it is commissioned.