Installation of a GREE VITA R32 wall-mounted heat pump in Mercier–Hochelaga-Maisonneuve, Montreal: mini split air conditioner installed in an interior renovation space

A precise HVAC installation in a room where every inch counted

In Mercier–Hochelaga-Maisonneuve, wall heat pump projects often require a very hands-on approach. Homes in the area have varied configurations: townhouses, Montreal plexes, step-renovated apartments, partitioned rooms, load-bearing walls, decorative moldings, closely spaced doors, and sometimes limited exterior access. This installation of a GREE VITA R32 perfectly illustrates this type of reality.

In the photo, the wall unit is installed above a large wall mirror, between a renovation opening on the left and an interior door on the right. The ceiling is low, the decorative molding limits maneuvering space, and the available wall space is narrow. So, this was not a standard installation on a large free wall. The mini split had to be positioned precisely to maintain access to doors, respect technical clearances, ensure good air distribution, and avoid visually weighing down the room.

At AirGreen, we treated this project as a precision HVAC installation. The goal was clear: to install an efficient, discreet, and well-integrated wall air conditioner, while taking into account a transforming indoor environment. The adjacent room visible in the image shows an open renovation area, with exposed structure and ongoing work. In this context, it was necessary not only to install the unit but also to plan for its future use once the work was completed.

Why the GREE VITA R32 was a good choice for this Montreal home

The GREE VITA R32 is especially suitable for residential projects where a compact, reliable solution well adapted to Quebec's climate is sought. The VITA R32 range from GREE Canada is available in several capacities, including 9,000, 12,000, 18,000, and 24,000 BTU, allowing the choice of the unit to be adjusted according to the area, insulation, orientation, ceiling height, and actual use of the room. GREE also indicates that this series notably includes G20 inverter technology, Wi-Fi connectivity, a wireless remote control, an option for a wired wall thermostat, a composite drainage tray, copper/aluminum coils, Blue Fin fins, and R32 refrigerant.

In this project in Mercier–Hochelaga-Maisonneuve, the capacity choice was evaluated based on the actual space layout. The presence of interior openings, an adjacent room under renovation, and circulation areas requires a more detailed analysis than a simple square footage calculation. A heat pump that was too small might have operated without achieving the desired comfort. A unit that was too powerful could have caused short cycling, less stable dehumidification, and temperature fluctuations.

The GREE VITA R32 offered an interesting balance here: compact wall-mounted design, quiet operation, good modulation thanks to inverter technology, and clean visual integration in a room where the available wall space was limited.

Installation above the mirror: a solution adapted to the actual layout

The indoor unit was installed above a large vertical mirror, in a very tight space between two openings. This choice was not just aesthetic. It addressed several practical constraints.

First, the available wall was interrupted by a door on the right and an opening to a room under renovation on the left. Installing the unit on another wall could have hindered air circulation, interfered with future layout plans, or created a direct air draft toward a seating area. The central position above the mirror allows better air projection into the living space without sacrificing a useful wall.

Next, the available height was limited by the decorative molding and the ceiling. Our technicians had to work carefully to maintain the clearances necessary for the proper operation of the unit. A wall-mounted heat pump needs space to draw air from the top and redistribute it efficiently. Installing it too close to the ceiling can reduce performance, complicate HVAC maintenance, and affect comfort.

Finally, the presence of the mirror required special attention. A mirror visually amplifies lines, misalignments, and imperfections. A slightly crooked device, a poorly aligned duct, or an approximate finish immediately become more noticeable. We therefore placed great importance on alignment, leveling, and finishing around the unit.

The technical challenges encountered on site

This installation involved several challenges specific to Montreal homes under renovation.

The wall above an interior opening

Positioning the unit above the mirror and near an opening required a thorough check of the structure. It was necessary to ensure that the wall mount was fixed in a stable area, capable of properly supporting the unit without excessive vibration. In older Montreal homes, walls can contain layered materials: plaster, laths, added drywall, modified structural elements, insulation, old or renovated wiring. Every drilling must be carefully considered.

The proximity of the decorative molding

The molding visible on the ceiling adds character to the room, but it reduces the available space for installation. Our technicians had to maintain a sufficient distance for air intake while avoiding damage to the existing finish. A clumsy cut or a box placed too close would have resulted in a less clean and harder-to-maintain outcome.

The renovation context

The open room on the left shows work in progress. In this type of project, you have to think about the final result, not just the state of the room at the time of installation. We therefore took into account the future layout, upcoming finishes, and how the air will circulate once the walls are closed or the doors are put back in place. This anticipation avoids common problems: device poorly placed relative to the final furniture, difficult access to filters, visible piping after finishing, or airflow blocked by future furniture.

The role of R32 in a modern installation

The VITA R32 uses the refrigerant R32, mentioned by GREE Canada in the specifications of this range. This refrigerant is now common in several new wall-mounted heat pump units, and it fits into the evolution of recent residential systems. GREE also mentions a refrigerant leak detector integrated into the indoor units of the VITA R32 series.

For owners in Montreal, Laval, Longueuil, the North Shore, and the South Shore, this technology must, however, be installed by qualified professionals. Refrigerant connection, vacuum pulling, pressurization, leak testing, pipe insulation, and commissioning are not secondary steps. They directly determine the machine's performance, durability, and reliability.

At AirGreen, we never treat a mini split installation as just a simple wall mount. The visible result is the indoor unit; the real result depends on everything that is unseen: tightly sealed connections, proper drainage slope, continuous insulation, compliant electrical circuit, and controlled startup.

Indoor comfort: more than just a matter of temperature

The unit's display shows 30 in the photo, which reminds us of an important point: a heat pump is not only used to cool the air. It helps stabilize comfort in a room that can become hot, heavy, or uneven depending on the season, sunlight, ventilation, and daily use.

In a home in Mercier–Hochelaga-Maisonneuve, especially when part of the space is under renovation, temperature differences can be significant. An open room, an unfinished area, a poorly insulated wall, or irregular air circulation can make comfort difficult to control. The GREE VITA R32, thanks to its inverter operation, can adjust its effort rather than just operating on an on-off basis. This modulation contributes to a more stable temperature, fewer sudden variations, and a more pleasant use.

The noise level is also important. GREE indicates, for certain configurations of the VITA R32, indoor noise levels that can drop as low as 24 dB(A), depending on the ventilation speed, which is relevant in a living room, bedroom, or multipurpose space.

Special attention to air diffusion

In this installation, the position of the unit above the mirror allows air to be blown toward the open space, rather than directly onto a door, passage, or very close area. This is an essential detail.

A wall air conditioner poorly oriented can create a sensation of cold drafts, even if the average temperature is correct. Conversely, a well-placed unit improves air distribution and often allows setting the temperature at a more reasonable level without overworking the device.

After installation, we always check:

• the orientation of the louvers;
• the reach of the air jet;
• the device’s response to setpoint changes;
• condensate drainage;
• vibrations;
• access to filters;
• stability in cooling and heating mode;
• the communication between the indoor unit and the outdoor unit.

This final check is especially important in a space like this, where the unit is very visible and the wall offers little margin for error.

Subsidies and eligibility: an essential check before purchase

For homeowners installing a wall-mounted heat pump in Quebec, financial aid can influence the choice of model. Hydro-Québec specifies that the LogisVert aid for heat pumps depends on the program requirements and the type of device. The program notably indicates financial aid of $50 per 1,000 BTU/h at -8 °C for an ENERGY STAR certified heat pump, and $120 per 1,000 BTU/h at -8 °C when it is a cold climate type, if all conditions are met. Hydro-Québec also mentions that the work must aim at installing an ENERGY STAR heat pump for heating and cooling purposes, and that the company must hold the appropriate licenses.

At AirGreen, we assist our clients in understanding these requirements. The amounts and conditions may change, and it is always necessary to verify the eligibility of the exact model, the installed configuration, and the dwelling before relying on a subsidy. We provide the necessary information on the invoice and guide clients on what to keep: model, serial number, proof of payment, photos, and required documents.

Mistakes to avoid in a similar installation

This project highlights several common mistakes that we help our clients avoid.

Installing the unit only where it “fits”

A free wall does not automatically mean a good location. You need to check air distribution, maintenance access, structure, distance to the ceiling, and the path to the outside. In this room, the choice above the mirror was logical, but only after validating the constraints.

Neglecting drainage

In air conditioning, the indoor unit produces condensate. If the drain slope is poorly designed, problems can arise: drips, odors, noise, overflow, or marks on the wall. In a renovated dwelling, a drainage error can damage new finishes.

Forgetting future work

Installing a wall-mounted heat pump in a space under renovation requires anticipating the next steps. A wall that will be closed up, a door that will be replaced, added molding, or planned furniture can change the use of the room. We always discuss these elements before fixing the unit.

Choosing a device without thinking about after-sales service

The brand, price, and BTU matter, but after-sales service matters just as much. A well-installed device must also be maintainable, diagnosable, and repairable if necessary. AirGreen installs systems with future access in mind, not just the final photo.

Our AirGreen approach in Mercier–Hochelaga-Maisonneuve

This installation reflects well our way of working in Montreal. We first observe the reality of the building, then we propose a solution that takes into account the device, the room, the occupants, and the existing or upcoming work.

In this specific case, our team had to balance several priorities: maintaining a clean finish around a large mirror, respecting the moldings, avoiding opening areas, ensuring good air distribution, and integrating the unit into a room that was not yet in its final state. The result is a well-positioned, accessible, and functional GREE VITA R32, capable of contributing to daily comfort without taking up floor space or blocking traffic flow.

We carry out this type of project throughout the greater area: Montreal, Laval, Longueuil, the North Shore, and the South Shore. Each area brings its own particularities. In Laval, houses often offer more outdoor space, but duct lengths can be longer. In Longueuil, plexes and renovated houses often require special attention to existing walls. On the South Shore, projects frequently include single-family homes with multiple zones. On the North Shore, installations sometimes require more advanced planning for supplemental heating in winter.

In Mercier–Hochelaga-Maisonneuve, the density of housing, progressive renovations, and atypical interior spaces make local expertise especially important.

A well-integrated wall heat pump for lasting comfort

This installation of the GREE VITA R32 wall heat pump shows that a successful HVAC project is not just about choosing a machine. It depends on the ability to read the space, understand the building’s constraints, and install the unit where it will truly be useful.

In this room, the placement above the mirror between two interior openings helped preserve space, improve air distribution, and achieve a clean visual integration despite constraints. The GREE VITA R32 offers a compact, modern solution suited to residential needs, while installation by AirGreen ensures a compliant, thoughtful, and durable implementation.

For owners in Mercier–Hochelaga-Maisonneuve considering a wall air conditioner, a heat pump, or a mini split, this project highlights the importance of a professional assessment. The right model must be chosen, but the right location and quality of installation make all the difference.