Installation of a Hitachi airHome Multi dual-zone heat pump in Boucherville: a discreet, high-performance HVAC solution for a South Shore residence
Installation of a Hitachi airHome Multi dual-zone multi-zone heat pump in Boucherville. Discover how AirGreen delivers durable, discreet, and high-performance HVAC installations throughout Montreal, Laval, Longueuil, the North Shore, and 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.
An HVAC installation designed to maximize outdoor space without compromising performance
At AirGreen, every HVAC installation is designed according to the building’s characteristics, the environment, and the owner’s expectations. This recent installation of a Hitachi airHome Multi multi-zone heat pump in Boucherville, on Montreal’s South Shore, is an excellent example.
The client wanted to efficiently cool and heat two separate zones of the residence while maintaining a functional outdoor layout. The site presented several constraints: a wooden deck immediately to the left of the planned location, a raised foundation, limited circulation space, and the need to preserve the rear façade’s appearance.
Our team therefore proposed a dual-zone Hitachi airHome Multi multi-zone heat pump, known for its reliability, flexibility, and energy efficiency.
Why this Hitachi airHome Multi heat pump was the best choice
The Hitachi airHome Multi system is designed to power multiple indoor units from a single outdoor unit, allowing independent control of each living space. According to the manufacturer’s specifications, this series can connect up to five different indoor units, depending on the building’s needs.
For this Boucherville residence, a dual-zone configuration perfectly met the occupants’ needs.
The main advantages of this installation include:
- Independent control of each room
- Optimized energy consumption
- Reduced outdoor footprint
- Very quiet operation
- Use of environmentally friendly refrigerant R32
- Compatibility with several types of indoor units (wall-mounted, ducted, console, cassette)
For a single-family home, this approach provides excellent comfort throughout the year without multiplying the number of outdoor units.
An installation adapted to the site's constraints
When observing the installation, several elements demonstrate the care taken by our technicians.
The outdoor unit was installed on sturdy wall brackets equipped with blue anti-vibration pads, allowing us to:
- to prevent snow from accumulating on the ground during winter;
- to protect the equipment from moisture;
- to effectively reduce vibration transmission to the structure;
- to maintain clear space beneath the unit for easier maintenance.
This installation method is particularly appreciated in the residential areas of Boucherville, where Quebec winters can result in significant snow accumulation.
It is also worth noting that the unit is sufficiently far from the rear wall to ensure good airflow while remaining close to the building to limit the length of the piping.
Particular attention paid to aesthetics
At AirGreen, we believe that a heat pump installation should be as attractive as it is high-performing.
In this project:
- the refrigerant lines are grouped in a perfectly aligned vertical line set cover;
- the entire installation remains discreet against the brick wall;
- the positioning allows for circulation around the deck;
- the outdoor unit does not interfere with access to or use of the yard.
Even details such as the clearance beneath the unit were carefully considered to facilitate seasonal cleaning and extend the system's lifespan.
The challenges encountered during this installation
Each residence has its own unique characteristics.
In this project, several elements required careful planning:
Limited space between the deck and the wall
The immediate presence of the wooden structure considerably limited the fastening options.
Our installers therefore took precise measurements so that:
- the service opening remains accessible;
- the recommended clearances are respected;
- the fan can operate without restriction.
Protection against winter conditions
In Boucherville, snow accumulation can quickly reach the base of homes.
The wall-mounted installation prevents the unit from being buried in snow during the winter while protecting its mechanical components.
Vibration reduction
The vibration-damping mounts installed beneath the unit help reduce resonance and improve occupant comfort.
This type of detail often makes all the difference in the long term.
The technical features that set the Hitachi airHome Multi apart
The Hitachi airHome Multi system features several advanced technologies that contribute to its efficiency.
These include:
Inverter technology
Power modulation enables the compressor to continuously adjust its operation to maintain a stable temperature while reducing electricity consumption.
FrostWash technology
Hitachi incorporates its exclusive FrostWash technology, which automatically cleans the indoor coil through a freeze-and-defrost cycle to reduce contaminant buildup and maintain optimal airflow.
Enhanced filtration
Depending on the type of indoor unit selected, the system can include:
- PM2.5 activated carbon filter;
- ViroSense S filtration;
- odor reduction;
- improved indoor air quality.
Independent zone control
Each room can be adjusted independently:
- temperature;
- fan speed;
- scheduling;
- individual operation.
Thus, one bedroom can be cooled while another room remains off, providing greater comfort and energy savings.
A system perfectly suited to Quebec's climate
Although this multi-zone system is designed to operate efficiently down to -20 °C in heating mode, it remains an excellent solution for homeowners looking to replace several air conditioners or older electric systems while enjoying superior comfort. The manufacturer also announces efficiency ratings of up to 23.0 SEER2 and 7.85 HSPF2-5, depending on the selected configuration.
For many homes in Montreal, Laval, Longueuil, the North Shore, and the South Shore, this combination offers an excellent balance between performance and energy savings.
Why Choose AirGreen for a Hitachi Installation
Our expertise goes far beyond simply installing the equipment.
Each project includes, among other things:
- comprehensive analysis of the building's needs;
- capacity calculation;
- optimization of the piping route;
- secure fastening;
- complete vacuuming;
- operational testing;
- performance verification before commissioning.
We also pay particular attention to the visual finish of every installation, an aspect that is often overlooked but highly appreciated by our customers.
What This Installation Demonstrates
This installation in Boucherville perfectly illustrates our philosophy.
A successful multi-zone heat pump installation depends not only on the choice of equipment.
It also relies on:
- careful planning;
- smart positioning of the outdoor unit;
- excellent management of the building's constraints;
- a clean finish;
- a durable installation that will make maintenance easier for many years.
At AirGreen, we install Hitachi heat pumps, multi-zone heat pumps, wall-mounted air conditioners, and other HVAC systems every day throughout Montreal, Laval, Longueuil, Boucherville, the North Shore, and the South Shore, applying the same quality standards to each of our projects.
An Installation Designed to Last
By observing this installation, it is easy to see that every technical decision was made with a specific goal: to ensure performance, protect the equipment from the harsh Quebec climate, and provide the owner with a discreet, reliable system that is easy to maintain for many years. This is exactly what sets an installation carried out by an HVAC specialist team apart.
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.
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).