Installation of a GREE FREE MATCH R32 Dual-Zone 2-Head Heat Pump in Charlemagne: an HVAC rooftop project designed for comfort, aesthetics, and performance
AirGreen installs a GREE FREE MATCH R32 DualZone heat pump in Charlemagne: 2-head system, rooftop unit, precise comfort, clean HVAC installation tailored to residential needs.
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A GREE DoubleZone installation in Charlemagne where every detail counts
In Charlemagne, AirGreen recently completed a particularly interesting HVAC installation: a GREE FREE MATCH R32 DoubleZone heat pump, designed to power two distinct indoor zones from a single outdoor unit. This type of installation is highly valued by homeowners who want to improve comfort in multiple rooms without multiplying the visible outdoor equipment.
The project stood out due to an important element: the outdoor unit had to be installed on a flat roof, in an open urban environment, with several technical constraints related to stability, the routing of refrigeration lines, protection of the membrane, and the visual integration of the equipment. As can be seen in the construction photo, the outdoor unit was installed on a raised, solid, and clear structure, allowing optimal airflow around the machine.
This approach is essential for a multi-zone heat pump. A poorly positioned outdoor unit can negatively affect performance, increase noise, complicate future maintenance, or reduce the lifespan of the appliance. At AirGreen, we never limit ourselves to "just installing a machine". We analyze the entire environment: access, clearances, drainage, snow, wind, noise, vibration, line lengths, placement of wall-mounted units, and ease of maintenance.
In this specific case, the objective was clear: to provide a reliable, discreet, and efficient 2-zone system, capable of meeting the building's comfort needs while respecting the constraints of a rooftop installation.
Why choose a GREE FREE MATCH R32 DoubleZone?
The GREE FREE MATCH R32 range is a very attractive solution for homeowners looking for an efficient, flexible DoubleZone heat pump adapted to the realities of Quebec residences. The system allows two indoor units to be connected to a single outdoor unit, which reduces bulk and simplifies outdoor installation.
For a building in Charlemagne, this choice was relevant for several reasons:
- two indoor zones could be controlled separately;
- the single outdoor unit limited the visual impact on the roof;
- inverter technology allowed for more precise modulation according to real demand;
- the R32 refrigerant offered a modern solution, increasingly present in new generations of HVAC systems;
- the multi-zone configuration better met the living habits of the occupants than a simple single-zone wall-mounted system.
In a house or condo, needs are never identical from one room to another. A bedroom, a living room, an office, or an open area can have very different thermal loads depending on orientation, sunlight, insulation, number of windows, and daily use. A 2-head heat pump therefore allows for better distribution of comfort, without overheating or over-cooling one zone to compensate for another.
A flat roof: practical, but demanding
Installing a heat pump on a flat roof requires much more precision than a ground-level installation. The main advantage is obvious: the equipment remains discreet, away from passages, frees up ground space, and can sometimes offer a better path for refrigeration lines. However, this type of installation demands particular attention.
On this construction site in Charlemagne, our team had to ensure that the outdoor unit was:
- sufficiently elevated to prevent snow accumulation;
- perfectly stable despite wind and normal operating vibrations;
- installed without damaging the roofing membrane;
- positioned with proper clearances around the fan and heat exchanger;
- accessible for future HVAC maintenance;
- cleanly connected to refrigeration lines and electrical wiring.
The visible structure beneath the unit plays a fundamental role here. Treated wooden bases, placed on suitable protection, help distribute the load and avoid problematic direct contact with the roof. The unit is installed on metal supports, which keeps it clear of gravel and promotes good air circulation.
This type of detail may seem secondary, but it directly influences the reliability of the system. A unit that is too low risks being blocked by snow or debris. A poorly leveled unit can generate noise, vibrations, and premature wear. A poorly placed unit can complicate access to service panels. It is precisely these kinds of problems that our team anticipates even before starting the installation.
The routing of refrigeration lines: a decisive step
In a DoubleZone installation, there are more refrigeration lines than in a single installation. Each indoor head must be connected to the outdoor unit by its own circuit, which requires meticulous routing planning.
In the photo, we can see the insulated ducts neatly reaching the outdoor unit. This grouping must be done carefully to avoid excessive bends, mechanical stresses, rubbing against roof elements, or low points that could affect drainage or the longevity of the insulation.
Our technicians paid particular attention to:
- the protection of pipe insulation;
- the bending radius of refrigeration lines;
- the secure fastening of ducts;
- maintaining a clean and accessible route;
- adequate separation between refrigeration and electrical connections;
- the waterproofing of passages into the building.
These steps are crucial in a multi-zone heat pump installation. Poor bending, an unprotected line, or damaged insulation can lead to efficiency losses, condensation, unwanted noise, or costly long-term repairs.
An installation designed for future maintenance
A good HVAC system must perform well on the day of installation, but also be easy to maintain in the following years. That's why we always plan for logical access to main components: service panels, valves, connections, clearances around the heat exchanger, and workspace for a technician.
In this project in Charlemagne, the GREE outdoor unit was positioned to allow reasonable access despite the rooftop environment. This decision is important because regular HVAC maintenance helps maintain machine performance, reduce energy consumption, and extend the system's lifespan.
For a DoubleZone heat pump, maintenance is not limited to the outdoor unit. Both indoor heads must also be cleaned periodically: filters, coils, fan, drainage tray, and condensate outlet. A well-maintained multi-zone system offers more stable comfort, better air quality, and quieter operation.
AirGreen expertise applied to multi-zone installations on the North Shore and in Greater Montreal
The installation of a GREE FREE MATCH R32 heat pump in Charlemagne perfectly reflects the type of projects we regularly undertake in Greater Montreal, in Montreal, Laval, Longueuil, on the North Shore and the South Shore. Each building has its specificities: restricted access, co-ownership, flat roof, façade to preserve, piping lengths, electrical requirements, noise constraints or syndicate rules.
In Charlemagne, as in many residential areas on the North Shore, we often encounter buildings where the ideal outdoor location is not at ground level, but rather at height. This configuration requires an experienced team, capable of working cleanly and respecting good practices in terms of safety, waterproofing, and HVAC performance.
Common mistakes to avoid with a DoubleZone heat pump
A 2-zone heat pump offers a lot of flexibility, but only if it is well designed from the start. Many problems we see in the field come from installations that are too rushed or poorly planned.
Here are the most common mistakes to avoid:
Choosing indoor locations without analyzing the rooms
The two heads should not be placed only according to the easiest spot to drill. Air circulation, room usage, sun orientation, ceiling heights, doors, corridors, and furniture must be considered. A poorly positioned wall-mounted unit can create uncomfortable zones, even with a good machine.
Underestimating the length of refrigerant lines
In a multi-zone system, the total length of the lines influences the design. Manufacturer limits must be respected, correct routes planned, and unnecessary detours avoided. Imprecise planning can complicate installation and negatively impact performance.
Installing the outdoor unit too close to an obstruction
An outdoor unit needs to breathe. On a roof, it can be tempting to place it near a wall, vent, skylight, or other equipment. However, poor clearance can reduce efficiency, increase pressure on the compressor, and make maintenance more difficult.
Neglecting roof protection
A rooftop installation must always respect the integrity of the membrane. Supports, bases, and conduit routing must be designed to avoid pressure points, friction, and infiltration risks.
Forgetting future maintenance
A unit installed in an inaccessible location can be more expensive to maintain and complicate repairs. At AirGreen, we think about the actual use of the system, not just its appearance on installation day.
Comfort achieved after installation
Once the installation is complete, occupants benefit from much more precise comfort. The two zones can be adjusted independently, allowing the temperature to be better adapted to actual needs. For example, a living area can be cooled more during the day, while a bedroom can be set differently in the evening.
This flexibility is particularly useful in buildings where certain rooms heat up faster due to sun exposure or large windows. With a single wall-mounted unit, compromises often have to be made. With a DoubleZone heat pump, comfort is better distributed and easier to control.
The choice of GREE FREE MATCH R32 also aligns with an energy efficiency logic. Inverter technology allows the system to modulate its operation instead of constantly starting and stopping. The result: a more stable temperature, fewer sudden variations, and better controlled consumption.
A project representative of our HVAC approach
This site in Charlemagne perfectly illustrates our way of working. Before installation, we analyze the building, access, client expectations, and technical constraints. During installation, we prioritize cleanliness, safety, and durability. After installation, we ensure that the client understands how their system works and proper maintenance practices.
For a system like the GREE FREE MATCH R32 DoubleZone, this approach is essential. A high-performance appliance only reaches its full potential if it is properly sized, positioned, connected, and commissioned.
Our teams regularly work on similar projects in Montreal, Laval, Longueuil, on the North Shore and the South Shore. We know that homeowners are not just looking for a machine. They want a reliable solution, real comfort, a clean installation, transparent pricing, and a contractor capable of clearly answering their questions.
Subsidies and eligibility: a point to validate before purchase
Several clients who contact us for a wall-mounted heat pump, a multi-zone heat pump, or a wall-mounted air conditioner want to know if their project is eligible for financial assistance, particularly through provincial programs like LogisVert. Eligibility depends on the specific model, configuration, applicable criteria, and available documentation at the time of installation.
For an HVAC installation like this one, our role is to help the client better understand important information: model number, detailed invoice, proof of installation, technical specifications, and necessary documents. Programs can evolve, so it is always best to validate the eligibility of the exact system before confirming the purchase.
At AirGreen, we support our clients through this step to avoid unpleasant surprises. A machine may seem interesting on paper, but its actual compliance with applicable criteria must always be verified.
Why AirGreen for an installation in Charlemagne?
A rooftop installation with a DoubleZone heat pump requires more than a simple setup. It demands a complete understanding of the building, the product, installation standards, safety, and long-term comfort.
AirGreen stands out for:
- extensive experience in residential and multi-zone HVAC installation;
- practical knowledge of the specific constraints of flat roofs;
- particular attention to visible and invisible details;
- a team accustomed to projects in Montreal, Laval, Longueuil, on the North Shore and the South Shore;
- recommendations tailored to each building;
- accessible and professional after-installation service.
In this project in Charlemagne, the result is a clean, stable, and functional installation, with a well-positioned outdoor unit, protected conduits, and a configuration designed to last.
Practical advice for homeowners considering a multi-zone heat pump
Before choosing a two-head heat pump, it's important to carefully assess your needs. A good decision isn't based solely on the number of BTUs or the brand of the unit.
Here are some helpful tips:
-
Identify priority zones
Determine which rooms genuinely need independent control: bedrooms, living room, office, basement, open-plan area. -
Analyze sunlight exposure and insulation
Two rooms of the same size can have very different needs depending on their exposure and insulation. -
Plan the outdoor location from the start
The outdoor unit must be accessible, stable, well-ventilated, and installed in an appropriate location. -
Request an on-site evaluation
Photos can help, but a visit often reveals unseen constraints: electrical panel, roof access, structure, line routing, drainage. -
Consider maintenance
A good installation should allow for easy cleaning and inspection, both indoors and outdoors. -
Compare the complete solution, not just the machine price
The quality of the supports, connections, commissioning, and after-sales service has a direct impact on the system's durability.
A Durable Installation for Controlled Comfort
The GREE FREE MATCH R32 Dual-Zone heat pump installed in Charlemagne represents a well-suited solution for homeowners seeking flexible comfort, a discreet exterior appearance, and professional rooftop installation. Through rigorous planning, careful execution, and close attention to technical details, AirGreen delivered a system designed to provide reliable performance season after season.
This project also demonstrates the importance of choosing an HVAC contractor who understands local realities. Whether in Charlemagne, Montreal, Laval, Longueuil, on the North Shore or the South Shore, every installation deserves a personalized approach. A good system always begins with a good analysis, and that is precisely what we prioritize in our work at AirGreen.
The job tools
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.
How the job unfolds
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 we check on a job like this one
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.
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.
Good habits, once the unit is in place
Six simple habits that keep the unit going. Your list stays on this device.
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.
The right pages, at the right time
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).