Installation of a FUJITSU ORION XLTH KZAH R-32 12,000 BTU wall-mounted heat pump in Saint-Constant
In Saint-Constant, AirGreen installs a FUJITSU ORION XLTH 12,000 BTU wall-mounted heat pump in a residential office. A quiet, efficient HVAC solution adapted to Quebec winters.
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 Discreet and Strategic HVAC Installation in a Residential Workspace
In Saint-Constant, on Montreal's South Shore, our AirGreen team recently completed an installation of a FUJITSU ORION XLTH 12,000 BTU wall-mounted heat pump in a multi-functional room used as both an office and a living space. This project perfectly illustrates how a well-thought-out HVAC installation can transform the thermal comfort of a room while adhering to very specific layout constraints.
From our first visit, several key elements guided our approach: a relatively low ceiling, a restricted wall corner, the presence of a workstation (screen, microphone, articulating arm), and an adjacent window influencing heat loss. The client was looking for a solution that was quiet, efficient for winter heating, and visually discreet.
We recommended and installed the FUJITSU ORION XLTH KZAH R-32 | 12,000 BTU, a heat pump perfectly suited to the climatic conditions of Greater Montreal, Laval, Longueuil, the North Shore, and the South Shore.
Why this FUJITSU model was the right choice for this installation in Saint-Constant
Heating Performance Adapted to Quebec Winters
In a room used daily as an office, thermal comfort must be constant. This FUJITSU ORION XLTH wall-mounted heat pump offers:
- Effective heating down to −26 °C
- Stable capacity even during prolonged cold spells
- Inverter technology ensuring uniform temperature
In this specific case, the client previously used electric wall heating (visible in the photo), which led to high costs and inconsistent heat. The installation of this heat pump now allows for:
- A significant reduction in energy bills
- Faster temperature rise
- Constant comfort without fluctuations
Quiet Operation Ideal for an Office
One of the essential criteria for this project was noise. Since the room is used for calls, audio recordings, and focused work, a nearly inaudible solution was required.
The FUJITSU ORION XLTH offers:
- 23 dB(A) minimum indoors
- Smooth airflow, without turbulence
Result: even during continuous operation, the heat pump does not disturb calls or recordings.
Technical Details of the Installation Carried Out by AirGreen
Optimal Positioning of the Indoor Unit
As seen in the image, the wall unit was installed high up, near the ceiling, in a strategic corner of the room. This choice is never left to chance.
Our objectives were:
- Maximize air distribution throughout the room
- Avoid obstacles (screen, microphone arm, furniture)
- Minimize visual impact
Despite the confined space, we achieved a clean and balanced integration, with optimized airflow direction to avoid blowing directly onto the workstation.
Managing Space Constraints
The main challenge here was the proximity of the ceiling and the adjacent wall, which limits installation margins.
Our solutions:
- Strict adherence to minimum clearances recommended by Fujitsu
- Precise adjustment of the wall bracket
- Millimeter-precise installation to avoid any vibration or noise
This type of configuration requires real expertise in residential HVAC installation, as improper positioning can affect:
- Air circulation
- Energy efficiency
- Appliance durability
Refrigerant Piping Routing
The piping (1/4 – 3/8) was discreetly integrated, taking into account:
- The wall structure
- Interior aesthetics
- Exterior access for the condenser unit
We also performed:
- A complete vacuum pull
- Pressure verification
- Commissioning in compliance with standards
Energy Performance and Concrete Savings
Certified Efficiency
The FUJITSU ORION XLTH 12,000 BTU offers remarkable performance:
- SEER2: 30.5
- HSPF2: 12.7
- ENERGY STAR® (cold climate) certification
This concretely means:
- Less electricity consumed in summer
- More economical heating in winter
- Stable performance over several years
LogisVert Subsidy Available
For this project in Saint-Constant, the client is eligible for a LogisVert provincial subsidy of $1,200, which:
- Reduces the initial cost
- Accelerates the return on investment
At AirGreen, we always support our clients in these processes.
Advantages of R-32 Refrigerant in this Project
This installation uses R-32 gas, which offers several benefits:
- Reduced environmental impact
- Better thermal efficiency
- Modern technology aligned with future standards
From a sustainability perspective, this is a wise choice for homeowners looking to modernize their HVAC system.
Customer Feedback After Installation
A few days after commissioning, the client confirmed several notable improvements:
- Stable temperature even on cold nights
- Total silence during calls and work
- Immediate reduction in wall heater usage
The integrated Wi-Fi control also allows for:
- Adjusting the temperature remotely
- Programming cycles according to work schedules
AirGreen's Advice for This Type of Installation
To be prioritized
- Install the unit high up for better distribution
- Keep clearance around the unit
- Clean filters regularly
To be avoided
- Installing too close to the ceiling without respecting margins
- Obstructing the air outlet with furniture
- Neglecting maintenance
Why Choose AirGreen for Your HVAC Installation in Saint-Constant
At AirGreen, every installation is adapted to the client's reality, not standardized. In this project:
- Complete analysis of the room and its use
- Selection of a perfectly suited model
- Precise installation despite constraints
- Professional commissioning
We operate everywhere in Montreal, Laval, Longueuil, the North Shore, and the South Shore, with recognized expertise in Fujitsu wall-mounted heat pumps.
Final Result: Comfort, Efficiency, and Perfect Integration
This installation in Saint-Constant demonstrates that a well-chosen and well-installed wall-mounted heat pump can transform a workspace into a perfectly comfortable environment, summer and winter alike.
The FUJITSU ORION XLTH 12,000 BTU proves here to be a reliable, quiet, and durable solution, perfectly adapted to Quebec's climatic realities.
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.
What the unit delivers when it is cold
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.
And 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.
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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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?
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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).