Installation of a MIDEA MIDEA 28 dual-zone heat pump in Sainte-Brigide-d'Iberville, in Montérégie

In Sainte-Brigide-d'Iberville, a MIDEA 28 installation where the electrical and refrigeration details make all the difference

On this installation completed in Sainte-Brigide-d'Iberville, the most interesting detail is not simply the presence of a MIDEA MIDEA 28 dual-zone heat pump. The job-site photo mainly shows what is rarely seen in promotional photos: the technical side of the outdoor unit, with its connections, electrical supply, outdoor disconnect, and the organization of the various circuits required to operate two zones.

This is precisely where much of the quality of an HVAC installation is determined.

A multi-zone heat pump must distribute its capacity among several indoor spaces while maintaining reliable communication with each unit. It therefore requires more planning than a simple single-zone system. In Sainte-Brigide-d'Iberville, we paid particular attention to the placement of the outdoor unit against the brick wall, its support, access to the service panel, and the routing of the connections.

The MIDEA multi-zone system’s operating principle is clearly defined by the manufacturer: one outdoor unit can power multiple indoor units, which can be adjusted individually according to the desired temperature in each space.

In this residence, this configuration makes it possible to create two distinct comfort zones with a single outdoor unit.

What this installation photo really shows us

The photo taken on site makes it possible to observe several technical details that deserve explanation.

The MIDEA outdoor unit is positioned near a brick masonry wall. It rests on a metal structure that keeps it above the concrete surface. On the wall, right nearby, there is a DiversiTech outdoor electrical disconnect. The conductors and connections to the heat pump are grouped on the service side of the unit.

This installation choice offers several advantages.

First, access to the technical side remains relatively direct. During future HVAC maintenance, our technician must be able to reach the panel, check the connections, inspect the components, and work on the refrigeration circuit without having to dismantle a nearby structure.

Next, the disconnect switch is installed in the immediate vicinity of the equipment. It allows the heat pump to be electrically isolated when service is required.

Finally, mounting the unit on a support limits its direct contact with the ground and makes it easier to organize the space beneath the appliance.

These are visually unremarkable elements, but they have a real impact on the installation’s quality and ease of maintenance.

Why choose two zones instead of two independent heat pumps?

To heat and cool two areas of a home, two main strategies are possible: install two independent single-zone systems or use a multi-zone heat pump with two indoor units.

In this Sainte-Brigide-d'Iberville project, the dual-zone design makes it possible to use a single outdoor unit.

MIDEA rightly highlights among the advantages of its multi-zone design the ability to connect several indoor units to a single outdoor unit, reducing the space occupied outside.

For a home where available space near the exterior walls is limited, this difference can be considerable. Instead of having two condensers, two locations to prepare, and two separate outdoor units, a single appliance can serve both areas.

This also simplifies the overall appearance of the façade or yard.

Two zones do not mean the same temperature everywhere

One point we always explain to our clients is that “dual zone” does not simply mean that two indoor units blow air from the same system.

Each indoor unit can respond to the temperature of its own space.

MIDEA indicates that the units in its multi-zone system can be controlled individually, allowing heating or cooling to be concentrated in the rooms that are actually being used.

Let’s take a typical example.

One indoor unit serves an open-plan area where the family spends most of the day. The second serves bedrooms or another section of the home. The needs are not necessarily the same at 2 p.m., 8 p.m., and during the night.

The system can therefore adapt its operation to the demand from each area.

This capability is particularly valuable in homes where temperature differences occur between floors, orientations, or different parts of the building.

The inverter is at the heart of how the MIDEA 28 operates

The MIDEA multi-zone range uses inverter technology. According to the manufacturer’s documentation, the system’s capacity can be adjusted as conditions change through modulation of the compressor and fan motors. This allows the system to operate at partial load when its full capacity is not required.

For the homeowner, this behavior is important.

A home almost never requires its maximum heating or cooling capacity continuously. The load varies according to:

• the outdoor temperature;
• sun exposure;
• the number of people present;
• the appliances in use;
• whether doors are open;
• the temperature requested in each zone;
• and the quality of the building envelope.

An inverter compressor can adjust its operating speed to these variations rather than constantly operating according to a full-power-then-complete-shutdown logic.

This modulation helps maintain a more stable indoor environment.

The capacity of each zone must be calculated, not simply guessed

A common mistake is to choose the BTU capacity based solely on the total floor area.

For a dual-zone heat pump, we should instead examine the needs of each area separately before assessing the total capacity required.

Two rooms with the same floor area can have very different heating and cooling loads. A room with extensive south-facing windows does not behave the same way as a north-facing room. A semi-below-ground basement does not have the same heat losses as a floor with a cathedral ceiling.

Insulation, windows, air infiltration, orientation, ceiling height, and the property’s natural air distribution must all be considered.

The MIDEA brochure also reiterates an essential rule specific to multi-zone systems: if the combined demand of the indoor units exceeds the available rated capacity of the outdoor unit, the capacity actually delivered to each unit may be reduced, particularly in heating mode.

In other words, mechanically adding the values listed on two indoor units is not enough to assess the system’s actual performance.

MIDEA 28 data: why the exact combination matters

The MIDEA documentation provided for this product line presents several outdoor units and several indoor-unit combinations. This is important because the SEER2, EER2, HSPF, and AHRI values must not be assigned to an installation simply based on the commercial name “MIDEA 28”.

For the ductless Extreme Heat configurations presented in the brochure, MIDEA publishes the following data, among others:

These values mainly illustrate why we work with the exact equipment combination.

The rating plate visible in the photo of this project was photographed at an angle that does not allow us to confirm the complete model number of the installed unit with sufficient accuracy. We therefore prefer not to arbitrarily assign a BTU rating or AHRI number to this installation when it is not legible and verifiable in the photo.

This is exactly the same caution we exercise when a customer wants to confirm eligibility for a rebate.

Rebates: the MIDEA name is not enough

When a homeowner is looking for a LogisVert-eligible heat pump, it is tempting to check only the brand or series.

For a multi-zone system, that is not precise enough.

The combination may include a specific outdoor unit and two specific indoor units. One AHRI reference may correspond to one combination, while another equipment pairing may have a different certification.

The MIDEA brochure also includes complete tables of ENERGY STAR combination rules and numerous indoor-unit configurations.

At AirGreen, we therefore recommend checking the outdoor model, indoor models, capacity, and exact AHRI reference before associating a rebate amount with a quote.

This is particularly important for customers in Montreal, Laval, Longueuil, the North Shore, and the South Shore, where financial incentives can strongly influence the choice between two systems.

A much more flexible platform than the term “dual zone” suggests

Although the Sainte-Brigide-d'Iberville project is presented here as a dual-zone system, the MIDEA multi-zone family is designed for many configurations.

The documentation explains that the range can combine ductless and ducted solutions. It specifically presents wall-mounted units, consoles, cassettes, ducted units, and air-handling units.

This flexibility becomes valuable in more complex projects.

For example, a property may have one zone where a wall-mounted head is the simplest solution, while another area is better suited to a concealed ceiling unit.

The MIDEA family therefore makes it possible to design the system according to the building, rather than forcing every room to use exactly the same type of emitter.

SynchroConnect: a particularly relevant detail on a multi-zone system

In the job-site photo, several connections naturally converge toward the technical side of the outdoor unit.

With multiple zones, it becomes essential to correctly match the refrigerant circuits and electrical connections.

MIDEA equips this platform with its SynchroConnect technology. The documentation explains that the system can diagnose the status of the connections and includes functions that synchronize the refrigerant circuits with the corresponding wiring.

This function facilitates commissioning, particularly on installations with more zones.

However, it does not replace good work practices. We identify each circuit, check the connections, and test the zones individually during commissioning.

An outdoor electrical supply designed for servicing

The DiversiTech box visible on the brick wall is one of the most informative elements in this photo.

For someone looking only at the front of a completed heat pump, this part of the installation often goes unnoticed. Yet it is essential.

The MIDEA brochure indicates a power supply of 208/230 V, single-phase, 60 Hz for the outdoor units in the range presented.

The electrical circuit must, of course, be sized according to the specific equipment installed and its nameplate.

The disconnect switch located near the heat pump allows technicians, among other things, to isolate the unit during servicing. The routing of the conductors must also be protected against weather and physical damage.

These are details that directly contribute to a professional installation.

An A2L label visible on the equipment

Another interesting detail appears on the heat pump’s side panel: the classification symbol A2L.

This indication means that the equipment requires work methods and precautions suited to this refrigerant category.

To the customer, this marking may seem secondary. For our technicians, it affects, among other things, procedures for handling the refrigeration circuit, the tools used, and how they work during maintenance or repairs.

This illustrates an important reality in today’s HVAC market: heat pump technology is also evolving in terms of refrigerants and service practices.

Access to the side panel is a design choice, not an accident

The location of this unit against the wall helps illustrate another aspect of the work: we must consider service that may be required five or ten years from now.

An HVAC system should remain accessible.

On this job, the side panel, wiring, and connections are located on the same general side of the unit. This makes it possible to concentrate service work in a defined technical area.

When designing an installation, we avoid placing this critical side in an area where a technician would be unable to work normally whenever possible.

The clearances required by the manufacturer around the unit must also be maintained. A simple photograph does not make it possible to measure each clearance precisely; they must be checked during installation according to the technical documentation for the exact model.

Points to check before buying a MIDEA dual-zone heat pump in Sainte-Brigide-d'Iberville

The price of the unit is only one part of the comparison

Two quotes for a MIDEA 28 heat pump may seem similar even though they do not necessarily include the same level of work.

Before comparing prices, we recommend checking:

• the exact capacity of the outdoor unit and the two indoor units;
• the exact AHRI combination;
• the sizing of each of the two zones;
• the length and routing of the refrigerant lines;
• how the lines will be protected outdoors;
• the location of the disconnect switch and the electrical requirements;
• the support planned for the outdoor unit;
• the clearances around the unit;
• the drainage of condensate from the indoor units;
• the evacuation and commissioning method;
• the actual eligibility of the combination for applicable rebate programs.

This list often helps explain why two installations using apparently “the same heat pump” can produce very different long-term results.

The refrigeration circuit vacuum must never be treated as a mere formality.

Before putting a system into operation, newly installed lines must be properly prepared.

Evacuation, or pulling a vacuum, helps remove the air and moisture present in the lines before the circuit is commissioned.

A heat pump may appear to operate normally on the first day even when an important step has been overlooked. The consequences may appear much later.

That is why we pay as much attention to procedures that will never be visible in the final photographs as we do to the project’s exterior appearance.

Two zones must be tested as two zones.

Commissioning a dual-zone system does not simply involve turning on both units and checking that they blow air.

We test the system’s behavior in different situations: one zone alone, the second zone alone, and then both zones when they simultaneously call for heating or cooling.

We also check communication, drainage, produced temperatures, unusual noises, vibrations, and the outdoor unit’s response to different demands.

This step is important because a multi-zone inverter system operates as a coordinated unit.

Sound level also depends on the choice of location.

MIDEA technical data shows that the outdoor-unit sound level varies according to capacity. In the published non-ducted Extreme Heat configurations, the listed values range from approximately 61 to 65 dB(A) for several mid-range capacities.

This data alone does not, however, indicate what the owner will hear in a bedroom.

Perceived noise also depends on distance, window placement, masonry surfaces that can reflect sound, compressor speed, and the system’s actual load.

That is why outdoor-unit placement is part of the project analysis.

Independent control is one of the real advantages of a multi-zone system.

For a property made up of several areas, a dual-zone system becomes particularly relevant when occupancy patterns are not the same everywhere.

MIDEA documentation explains that different temperatures and operating conditions can be used depending on the spaces, such as a living room, bedroom, or office.

This is the logic we seek in a well-designed installation: not simply adding BTUs, but distributing comfort intelligently.

In a room that is rarely used during the day, it may be unnecessary to reproduce the exact temperature of the main living area. Conversely, a bedroom may need different conditions at night.

Zoning gives the homeowner that flexibility.

Why this Sainte-Brigide-d'Iberville installation reflects our work at AirGreen so well

This photo might seem highly technical: a heat pump, an electrical box, a few lines and a brick wall.

For us, it tells an important part of the story of the trade.

We see a MIDEA multi-zone system, planned service access, a dedicated electrical supply, several cleanly grouped connections, a stable outdoor support and an installation adapted to an actual residence rather than a showroom environment.

We place the same importance on these details during our heat pump installations in Montreal, Laval, Longueuil, on the North Shore and on the South Shore.

Choosing the heat pump remains essential, but a system's actual performance also depends on its sizing, the quality of the refrigeration work, the electrical installation, the positioning of the units and the commissioning.

Installation of a MIDEA 28 dual-zone system: what we aim to achieve in the end

For this project in Sainte-Brigide-d'Iberville, the goal was not simply to mount an outdoor unit on the wall and connect two indoor heads.

We were looking for a cohesive system:

two independent comfort zones, a single outdoor heat pump, service-accessible installation, organized connections and a configuration adapted to the property.

This approach enables us to propose HVAC installations designed to operate during Quebec's humid summers as well as throughout heating periods.

For a homeowner considering a MIDEA MIDEA 28 dual-zone heat pump, we recommend determining the required capacity for each zone before choosing the unit. We can then verify the exact combination, electrical requirements, outdoor unit location, refrigerant line routes and, where applicable, eligibility for available financial incentives.

At AirGreen, we carry out this type of project in Sainte-Brigide-d'Iberville, throughout the greater Montreal area, in Laval, in Longueuil, on the North Shore and the South Shore, with particular attention to technical details that often remain invisible once the installation is complete.