Installation of a GREE CHARMO R32 wall-mounted heat pump in Beaconsfield: an HVAC project on a flat roof for discreet and lasting comfort
AirGreen installs a GREE CHARMO R32 wall-mounted heat pump in Beaconsfield on a flat roof: a clean, stable, and efficient mini-split solution to enhance residential comfort.
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 installation designed for performance, aesthetics, and the reality of Beaconsfield homes
In Beaconsfield, in the west of the island of Montreal, several residential properties have a particular configuration: flat roofs, well-appointed outdoor spaces, facades to preserve, and very specific comfort needs during hot periods as well as cooler mid-seasons. It is in this context that AirGreen carried out the installation of a GREE CHARMO R32 wall-mounted heat pump, an efficient, discreet, and well-suited air conditioning and heating solution for the demands of a meticulous residential project.
The construction site image clearly shows two GREE outdoor units installed on a gravel-covered flat roof, each placed on an elevated, stable, and protected support structure. This type of HVAC installation requires particular attention: it is not enough to simply place the outdoor unit on the roof. One must consider weight distribution, vibration, air clearance, drainage, access for HVAC maintenance, protection of the roofing membrane, and the neat routing of refrigerant and electrical lines.
In this project in Beaconsfield, our team favored a clean, methodical, and sustainable approach. The outdoor units were installed on bases designed to keep the equipment above the roof surface, with timbers and metal supports ensuring good stability. This configuration also facilitates the natural flow of water around the equipment, reduces the risk of direct contact with accumulated moisture, and better protects the installation against seasonal stresses typical of the Quebec climate.
The GREE CHARMO R32 is a wall-mounted heat pump designed for homeowners looking for a reliable, modern, and efficient system, without adding to the exterior appearance of their home. Thanks to its inverter technology operation, it adjusts its capacity according to actual demand, allowing for more stable comfort and more controlled energy consumption than a system that constantly starts and stops at full power.
Why the GREE CHARMO R32 was the right choice for this property
For this installation in Beaconsfield, the choice of the GREE CHARMO R32 model met several important objectives: improving indoor comfort, reducing reliance on less efficient heating or cooling solutions, limiting visual impact on the ground, and allowing for an exterior installation well integrated into the building's configuration.
The R32 refrigerant also represents a significant advantage in new-generation systems. It is known for its thermal efficiency and lower global warming potential than many older refrigerants. For a homeowner investing in a new heat pump, this technical detail matters: it is a more current choice, aligned with new trends in the HVAC market and growing demands for energy efficiency.
The GREE CHARMO series stands out for a combination appreciated in residential installations:
- quiet operation to promote daily comfort;
- good cooling efficiency during hot Montreal summers;
- useful heating performance during transitional seasons;
- inverter technology for more precise modulation;
- a compact design that facilitates roof, side yard, or wall-mounted installations depending on the building;
- interesting compatibility with the needs of single-family homes, condos, and small residential spaces in the west of the island.
In this specific case, the roof installation freed up ground space, avoided clutter near walkways, and preserved the property's overall appearance. In Beaconsfield, where properties are often well-maintained and homeowners wish to keep their yards clear, this solution is particularly relevant.
A flat roof: an advantage, but also a technical responsibility
Installing an outdoor unit of a wall-mounted air conditioner or mini split on a flat roof may seem simple at first glance. However, this type of project requires real expertise. A poor installation can cause vibrations in the structure, unwanted noise indoors, drainage problems, premature wear of components, or even damage to the roof.
At AirGreen, we approach this type of intervention with a precise method. Before installation, we analyze the available location, the orientation of the units, the required clearances around the fans, the proximity of obstacles, and the most logical path for the refrigerant lines. In the image, we note that the units are placed with sufficient clearance in front of the ventilation grilles, which is essential for proper air circulation.
An outdoor compressor should never be wedged against an obstacle, enclosed in a poorly ventilated corner, or installed too close to an element that could hinder its heat exchange. Poor air circulation forces the equipment to work harder, which can decrease its efficiency, increase its electrical consumption, and reduce its lifespan.
On this Beaconsfield roof, our team therefore paid particular attention to three elements:
The stability of the supports
The GREE units are installed on robust, elevated, and well-aligned supports. The wooden bases and metal supports distribute the load and keep the equipment at the correct level. This precision is important for the durability of the compressor, but also to limit vibrations.
Roof protection
A flat roof should never be treated as a simple work surface. Aggressive contact with the membrane should be avoided, poorly protected supports prevented, and an installation planned that does not create unnecessary pressure points. Our approach aims to protect the building as much as the HVAC equipment.
Access for maintenance
A good system must remain accessible. Technicians must be able to intervene to check connections, clean the unit, control pressures, inspect electrical components, and make necessary adjustments over the years. In this project, the space around the units facilitates future HVAC maintenance interventions.
Key stages of the AirGreen installation in Beaconsfield
Planning adapted to the building's configuration
Every AirGreen project begins with a concrete analysis of the building. In Beaconsfield, the flat roof offered an excellent installation possibility, but it also required rigorous planning. Our team had to consider the duct routing, the position of the indoor units, the height of the building, the safe passage of lines, and the final placement of the condensers.
A wall-mounted heat pump functions through a constant exchange between the indoor and outdoor units. The two are connected by refrigerant lines, communication wiring, adequate electrical supply, and a condensate drainage system. The better the layout is designed, the cleaner, more reliable, and more efficient the installation.
On this site, the presence of several elements on the roof, notably mechanical exhausts and surrounding structures, required precise positioning. The objective was to avoid areas where snow might accumulate excessively, respect clearances around the units, and maintain a neat visual finish.
Installation of supports and outdoor units
The photo shows two GREE outdoor units well positioned on the roof. The unit in the foreground is installed on an elevated structure with metal rails, timbers, and insulating blocks. This combination stabilizes the equipment while reducing direct contact with the roof.
This step is often underestimated by homeowners comparing quotes. However, the quality of the supports directly influences the durability of the installation. A poorly leveled or insufficiently robust support can cause:
- perceptible vibrations in the house;
- premature wear of connections;
- more noticeable noise during operation;
- poor water or snow drainage;
- risks of displacement over time.
Our team checks alignment, solidity, and stability before proceeding with connections. This rigor is part of our way of working, whether in Montreal, Laval, Longueuil, on the North Shore or on the South Shore.
Line routing: cleanliness and efficiency
One of the most important aspects of a mini split installation is line routing. A well-done installation must be functional, but also visually clean. Lines must be protected, properly insulated, and installed to avoid unnecessary tension.
On a roof, this often means planning a stable path, avoiding walkways, adequately securing lines, and maintaining a logical slope where condensate drainage is concerned. The objective is to deliver a discreet, durable, and easy-to-inspect installation.
In this Beaconsfield project, the units are positioned to optimize the technical route while preserving the overall appearance of the roof. This attention to detail is essential, especially in residential areas where visual integration matters as much as performance.
Commissioning: a step that confirms the quality of the installation
Once the equipment is installed, commissioning confirms that the system is working correctly. This step includes checking connections, verifying the electrical supply, functional tests, validating heating and cooling modes, and basic explanation to the client for daily use.
At AirGreen, we place great importance on this phase. A high-performance heat pump must be well installed, but it must also be well configured. Negligent commissioning can lead to discomforts, error codes, or reduced efficiency. Conversely, professional commissioning allows the client to immediately enjoy stable comfort and reassuring operation.
What the client concretely gains from this installation
The goal of a project like this is not just to add an air conditioning unit. It's about improving the quality of life in the home. With the GREE CHARMO R32, the owner benefits from a more stable temperature, better room-by-room control according to the interior configuration, quieter operation, and a modern system adapted for daily use.
In summer, the wall-mounted heat pump efficiently cools targeted spaces without resorting to noisy or cumbersome temporary solutions. During transitional seasons, it can also provide efficient heating when central heating is not yet needed or when certain areas of the house require additional comfort.
This flexibility is one of the reasons why mini split systems are so popular in the greater Montreal area. They allow comfort to be adapted to the reality of each home, without major ductwork.
Mistakes to avoid during a roof installation
A roof installation should always be entrusted to an experienced team. Here are some mistakes we too often see during corrective interventions or inspections:
Installing the unit directly on the roof
This is a frequent and risky mistake. Direct contact with the roof can promote moisture, vibration, debris accumulation, and damage to the membrane.
Neglecting air clearances
An outdoor unit needs space to breathe. If it is too close to a wall, parapet, or obstacle, its performance may decrease.
Forgetting future maintenance
A poorly placed system can be difficult to maintain. This increases future costs and complicates interventions.
Choosing the location solely for visual reasons
Aesthetics matter, but they should never compromise performance. The right location must combine discretion, efficiency, safety, and accessibility.
Comparing prices without comparing execution quality
Two quotes may mention the same wall-mounted heat pump model, but offer very different installation quality. Supports, materials, finish, commissioning, and team experience make a major difference.
AirGreen's expertise in complex residential HVAC projects
AirGreen regularly intervenes in residential projects where the configuration requires more than a standard installation. Flat roofs in Montreal, condos in Laval, semi-detached houses in Longueuil, properties with restricted spaces on the North Shore, discreet installations on the South Shore: each site has its specificities.
This project in Beaconsfield perfectly reflects our approach. We don't just aim to place an outdoor unit in the first available spot. We analyze the building, choose a coherent solution, and install the equipment in a way that promotes long-term performance.
Our experience in HVAC installation also allows us to advise clients on proper sizing, model selection, positioning options, sound considerations, realistic heating expectations, and good usage practices. A well-chosen and well-installed heat pump can provide years of comfort, but it must match the home and the client's actual use.
Practical advice for homeowners in Beaconsfield and West Montreal
For homeowners considering installing a wall-mounted heat pump, a few tips can prevent bad decisions:
- choose a contractor who actually visits the premises before recommending a solution;
- verify that the outdoor location respects the necessary clearances;
- ask how the lines will be protected and routed;
- ensure the outdoor unit will be installed on a stable and durable support;
- plan for future maintenance access;
- consider noise, not only for yourself but also for the neighborhood;
- check potential eligibility for available subsidies based on the chosen model and current criteria;
- avoid choosing solely based on the lowest price.
In Beaconsfield, as in several residential areas in west Montreal, homes often have architectural features that require special attention. A discreet and well-executed installation protects property value while improving indoor comfort.
A clean, stable result, ready for Quebec seasons
The final result of this GREE CHARMO R32 installation in Beaconsfield reflects what we aim for at AirGreen: a well-positioned system, stable outdoor units, clean integration on a flat roof, and a solution adapted to the client's reality.
The photo illustrates an element often invisible in commercial discussions: the quality of execution. The units are aligned, elevated, accessible, and installed in a clear environment. These are the details that contribute to the system's durability and customer satisfaction.
A GREE CHARMO R32 wall-mounted heat pump can offer excellent comfort when installed rigorously. But like any HVAC equipment, its performance depends as much on the product as on the competence of the installation team. That's why AirGreen emphasizes planning, precision, and finishing at every stage of the project.
For homeowners in Beaconsfield, Montreal, Laval, Longueuil, the North Shore, and the South Shore, this project demonstrates that a roof installation can be clean, efficient, and durable when carried out by a team specializing in heat pumps, wall-mounted air conditioners, mini splits, HVAC installation, and HVAC maintenance.
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).