Installation of a 3-head GREE FreeMatch R32 heat pump in Montréal-Nord

Three comfort zones integrated into a space where every centimeter mattered

On this in Montréal-Nord project, the installation did not simply involve mounting three wall units and connecting them to an outdoor unit. The layout required careful consideration of the installation height, airflow, filter access, refrigerant line routing, and condensate drainage.

The photo shows one of the three heads of the GREE FreeMatch R32 heat pump, installed on a white-paneled wall, just below a suspended ceiling made of perforated acoustic tiles. A passageway is immediately nearby. In this type of layout, a few centimeters can make the difference between a well-integrated unit and an appliance that is difficult to service or unable to distribute air properly.

We therefore paid particular attention to three elements visible in this installation:

• the head is positioned high enough to promote good air distribution;
• the front panel remains accessible for filter cleaning and HVAC maintenance;
• the air outlets can open without being obstructed by the passageway framing or the ceiling.

The unit’s illuminated display shows “61.” Depending on the remote control settings, this value may be displayed in degrees Fahrenheit. The photo does not make it possible to determine whether this is the set temperature or the measured temperature, but it confirms that the indoor unit was powered on when the photo was taken.

Why install a three-head heat pump?

A three-head heat pump can serve three separate spaces from a single outdoor unit. This configuration is particularly suitable for buildings with several enclosed rooms, areas used at different times, or spaces with different heating and cooling needs.

In this Montréal-Nord project, each indoor unit can distribute air directly into its own zone. This avoids relying on a single air outlet for the entire building and makes it possible to tailor ventilation and temperature more precisely to the conditions in each room.

The FreeMatch system is designed as a multi-zone platform. GREE’s documentation highlights reduced outdoor footprint, quiet operation, G10 inverter technology, intelligent defrosting, and the ability to use several types of indoor units.

This solution offers several concrete advantages:

• a single outdoor unit rather than three independent condensers;
• less clutter around the property or building;
• better adaptation to separate rooms;
• a more orderly exterior finish;
• more precise management of occupied zones.

In urban areas such as Montreal, where side clearances, passageways, balconies, and parking spaces can limit installation options, reducing the number of outdoor units often represents a significant advantage.

The number of heads alone does not determine the required capacity

One of the most common mistakes is choosing a heat pump solely based on the number of indoor units. Three heads do not automatically mean that a 24,000, 30,000, or 36,000 BTU/h outdoor unit will be appropriate.

In the GREE FreeMatch R32 range presented in the technical data sheet:

• the 18,000 BTU/h model can power two indoor units;
• the 24,000 BTU/h model can power two to three units;
• the 28,400 and 36,000 BTU/h models can power two to four units;
• the 42,000 BTU/h model can power two to five units.

In this range, a three-head configuration therefore starts with the 24,000 BTU/h outdoor model. However, this does not mean that this capacity is automatically suitable for every three-zone project.

At AirGreen, we assess in particular:

1. the actual area of each space;
2. ceiling height;
3. the quantity and quality of the windows;
4. the building’s orientation;
5. the level of insulation;
6. air infiltration;
7. the number of occupants;
8. heat-generating equipment;
9. the frequency with which doors are opened;
10. the simultaneous or intermittent use of the different zones.

A small bedroom, kitchen, office, or commercial space does not have the same heating and cooling loads. Sizing must reflect actual heat losses and gains, rather than simply adding the capacities listed for the three wall-mounted units.

The performance of the GREE FreeMatch R32 range

The documentation provided for the GREE FreeMatch R32 indicates performance of up to 21 SEER2, 12.5 EER2, and 10 HSPF2. The stated operating range extends from -30 °C to 48 °C in cooling and from -30 °C to 24 °C in heating. The total pipe length can reach 100 metres with certain outdoor units.

These values allow the system to be used for much of the Quebec year. Variable-speed technology adjusts compressor operation to demand rather than limiting the unit to a constant succession of starts and stops.

The technical data sheet indicates the same values of 21 SEER2 and 10 HSPF2 for the series’ outdoor units, while EER2 varies between 12 and 12.5 depending on the selected capacity.

Nevertheless, the operating range must be distinguished from the capacity actually available at a specific temperature. The fact that a heat pump can operate down to -30 °C does not necessarily mean that it maintains its full rated capacity in every configuration at that temperature. We therefore take into account the building’s heating needs, low-temperature capacity, and the possible presence of supplemental heating.

The role of R32 refrigerant in this installation

This FreeMatch generation uses R32 refrigerant. The documentation also mentions the integration of a leak detector associated with the A2L category.

Using an A2L refrigerant requires an installation that complies with the manufacturer’s requirements, particularly regarding:

• the refrigerant connections;
• the location of the units;
• the tools used;
• leak testing;
• vacuum evacuation;
• the amount of refrigerant;
• the applicable clearances and room volumes.

For the owner, the refrigerant change does not alter the heat pump’s daily use. For the installer, however, it requires mastery of the procedures associated with this new generation of equipment.

An installation prepared zone by zone

Positioning the three indoor units

We do not automatically position the heads in the center of the first available wall. Each location must allow the air to circulate through the area without blowing directly on occupants and without being blocked by a door, cabinet, partition, or architectural feature.

In the area visible in the photo, the proximity of the suspended ceiling and the passageway required particularly careful installation. The unit had to be high enough to distribute the air properly, without compromising the intake located in its upper section.

Access to the front panel also had to be maintained. A wall-mounted head installed too close to a ceiling can be difficult to open, complicate filter removal, or reduce incoming airflow.

The mounting must also be carried out on a sufficiently strong support. When a wall is covered with panels, it is not enough to fasten the mounting plate only to the visible covering. We check the structure behind the finish to limit vibration and keep the unit perfectly level.

Condensate drainage

Every wall-mounted air conditioner produces condensation in cooling and dehumidification mode. This water must be drained continuously.

We favor gravity drainage when the route allows it. The pipe must maintain a consistent slope, with no rises, sagging, or sections that could retain water.

Improper drainage can lead to:

• water flowing down the wall;
• gurgling noises;
• odors;
• moisture buildup;
• damage to the interior finish;
• avoidable service calls.

When gravity does not allow reliable drainage, a condensate pump may be considered. However, it should not replace proper route planning when a natural slope is possible.

Refrigerant piping for a multi-zone system

In a three-head installation, each indoor unit must be connected to the outdoor unit by its own piping circuit, along with the appropriate communication wiring.

The FreeMatch R32 series uses 1/4-inch connections for the liquid line and 3/8-inch connections for the gas line in the capacities shown. Depending on the outdoor unit, the maximum total length ranges from 40 to 100 meters, while the permitted height difference ranges from 15 to 25 meters.

For configurations that can accommodate three heads:

• The 24,000 BTU/h model is precharged for 30 meters and allows up to 60 meters of piping;
• The 28,400 and 36,000 BTU/h models are precharged for 40 meters and allow up to 80 meters;
• The 42,000 BTU/h model is precharged for 50 meters and allows up to 100 meters.

These options provide good flexibility when the three zones are far apart. However, they do not eliminate the need to measure each route, respect branch limits, and adjust the refrigerant charge according to the manufacturer's guidelines.

Checking the electrical panel

The outdoor units in this range operate on a 208- or 230-volt power supply. The maximum overcurrent protection depends on the capacity:

• 25 A for the 24,000 BTU/h model;
• 35 A for the 28,400 BTU/h model;
• 45 A for the 36,000 and 42,000 BTU/h models.

Before installation, we must therefore know the exact outdoor model, check the panel capacity, and confirm circuit compatibility. The circuit breaker must not be selected solely based on the number of heads or the nominal capacity stated in a preliminary quote.

The unit nameplate and the manufacturer’s MCA and MOCP data remain the references for final electrical sizing.

Commissioning

Once the three units have been installed, we perform the necessary checks before putting the system back into operation:

1. inspecting each refrigerant connection;
2. checking for leaks;
3. evacuating the lines;
4. opening the outdoor unit valves;
5. checking the electrical and communication connections;
6. testing each of the three zones;
7. condensate drainage test;
8. checking the louvers, fans, and remote controls;
9. checking for the absence of an error code;
10. explanation of the operation to the customer.

On a multizone system, labeling the lines and cables is particularly important. Switching two indoor units can cause communication problems or considerably complicate future troubleshooting.

The technical choices that make a multizone installation reliable over the long term

The result achieved in Montréal-Nord

The unit visible in the photo blends discreetly into the space’s white finish. Its elevated position promotes air distribution, while the louvers remain free to direct the airflow toward the occupied area.

Having a single outdoor unit for the three heads limits clutter around the building. The series also provides relatively quiet operation: for models capable of supplying three zones, the specifications indicate a maximum outdoor sound pressure level of 58 to 63 dB(A), depending on the capacity.

This installation therefore meets a common need in Montréal-Nord: getting heating and air conditioning in several separate spaces without multiplying the condensers on the façade or around the property.

Six mistakes to avoid with a three-head heat pump

1. Choosing the outdoor unit solely according to the number of units

Three heads can be connected to outdoor units with several capacities. The right selection depends on the heat loads of each room and the combinations authorized by GREE.

2. Positioning the heads too close to the ceiling

The air intake is generally located in the upper part of the unit. An installation that is too tight can reduce airflow and make filter cleaning difficult.

3. Directing the air toward a door or obstacle

An open door, partition, or cabinet can interrupt the airflow. The problem may then be incorrectly attributed to insufficient capacity.

4. Neglecting drainage

A system can cool properly while still causing water damage if the condensate line is improperly sloped or clogged.

5. Planning the electrical work before knowing the exact model

Requirements vary significantly among the 24,000, 28,400, 36,000, and 42,000 BTU/h units. The circuit and breaker ratings must be confirmed based on the final selection.

6. Assuming that every configuration qualifies for a rebate

Eligibility is based on the complete combination of indoor and outdoor units, certification, AHRI number, installation date, and building type. The name GREE FreeMatch R32 alone is not enough to confirm the amount.

LogisVert Rebates and AHRI Numbers

The product line sheet lists several AHRI numbers depending on whether the combination is ductless, ducted, or mixed. For ductless systems, the numbers shown range from 214931586 to 214931590 depending on the outdoor unit. It also indicates ENERGY STAR certification for the series models.

For heat pumps installed on or after November 26, 2025, Hydro-Québec requires the system to be ENERGY STAR certified to be eligible for the LogisVert program. The announced assistance is $50 per 1,000 BTU/h at -8 °C for an eligible ENERGY STAR heat pump and $120 per 1,000 BTU/h at -8 °C when it is classified for cold climates.

A bonus for certain multi-unit buildings may add $100 per 1,000 BTU/h at -8 °C for installations completed on or after June 15, 2026, bringing the potential total to $220 per 1,000 BTU/h at -8 °C when all conditions are met. This bonus depends, among other factors, on the building, its year of construction, its location, its heating system, and other eligibility criteria.

Before confirming financial assistance for an installation in Montréal-Nord, we therefore verify:

• the exact model of the outdoor unit;
• the models of the three indoor units;
• the AHRI number corresponding to the complete combination;
• the ENERGY STAR or ENERGY STAR Cold Climate classification;
• the recognized heating capacity at -8 °C;
• the type of dwelling;
• the installation date;
• the conditions in effect at the time of the work.

The brochure also mentions a standard ten-year warranty and an additional two-year extension through Wolseley when the registration or proof-of-installation requirements are met. The final terms must always be confirmed when purchasing and registering the units.

Usage and maintenance tips after installation

A properly installed multizone heat pump must also be used correctly. We recommend keeping access to all three heads clear and avoiding placing furniture, boxes, or shelves in front of the air discharge areas.

Filters should be inspected regularly and cleaned according to usage intensity. In a busy or dusty space, they may become dirty more quickly. A clogged filter reduces airflow, increases noise, and may affect performance.

The owner should also monitor:

• normal condensate drainage;
• unusual noises;
• excessive ice formation on the outdoor unit;
• snow accumulation around the condenser;
• messages or codes displayed on the units;
• variations in comfort between the three zones.

Access to the front panel of the head visible in the photo must therefore always remain clear. This detail confirms the importance of planning for HVAC maintenance at the design stage, not after installation.

A method applicable throughout Greater Montreal

This GREE FreeMatch R32 heat pump installation in Montréal-Nord illustrates how we approach multizone projects: we adapt each head to its room, each piping route to the building, and each outdoor unit to the actual calculated loads.

We apply the same method to our heat pump, multizone system, and wall-mounted air conditioner installations in Montreal, Laval, Longueuil, on the North Shore, and on the South Shore.

A reliable installation depends not only on the brand or the performance stated in a brochure. It also depends on capacity selection, unit placement, drainage, refrigerant connections, electrical supply, commissioning, and future access for maintenance.

In this project, the head installed beneath the suspended ceiling precisely represents this integration work: using the available space without compromising airflow, finish, or ease of maintenance, while connecting three distinct zones to a single GREE FreeMatch R32 system.