In Howick, a MIDEA35 precisely integrated into a room where comfort needed to remain discreet
This MIDEA MIDEA35 wall-mounted heat pump installation in Howick shows an aspect of HVAC work that technical specifications alone cannot illustrate: a good heat pump must not only heat and cool efficiently, but also fit naturally into the room where it will be used every day.
In the photo of our installation, the Midea indoor unit is positioned high on a large unobstructed wall, in a room with a contemporary design where several black light fixtures already draw attention. The heat pump’s clean white front panel therefore integrates without visually overwhelming the space. The central digital display remains readable when the unit is operating, while the louvers beneath the unit direct air toward the occupied area.
This project in Howick, in the Montérégie region, is particularly interesting because it demonstrates that a location that appears relatively simple nevertheless requires several technical decisions: installation height, airflow range, clearance around the evaporator, future access to the filters, refrigerant line routing, and positioning relative to living areas.
At AirGreen, we consider all these factors before securing a wall-mounted heat pump on the wall.
The MIDEA35 is part of Midea’s range of ductless wall-mounted systems, alongside the MIDEA28, MIDEA25, and MIDEA22 series.
A location chosen to circulate air throughout the room, not merely to hide the machine
The positioning of the evaporator is one of the most important decisions in an HVAC installation.
In this residence in Howick, the visible wall space made it possible to place the unit high up while maintaining a good distribution area in front of the louvers. We wanted to avoid having a tall piece of furniture, partition, or important architectural feature directly block the airflow.
A wall-mounted heat pump works much better when it can distribute air throughout an open area.
Cooled air naturally sinks, while warm air tends to rise. The elevated position of the unit therefore allows the fan and louvers to better manage these air movements according to the selected mode.
The MIDEA35 series provides particularly detailed control over airflow. Midea indicates up to 100 air volume adjustment levels, with continuous adjustment for more precise control of airflow throughout the room. The system can also be controlled remotely using SmartHome and Wi-Fi functions, depending on the configuration.
Why we do not automatically place a unit at the geometric center of a wall
A wall may look ideal visually while being technically unsuitable.
Before installation, we must take into account, among other things:
- the direction in which the air will be blown;
- the locations of the most occupied areas;
- the ability to open the front panel for maintenance;
- the structure behind the wall;
- the required route to the outdoor unit;
- condensate drainage;
- electrical constraints;
- the recommended clearances around the appliance.
The visible result in this home in Howick appears very simple precisely because these elements were addressed before the work was finished.
A heat pump that had to respect the room’s interior style
The image of this project shows a room where the decor was clearly carefully designed: an unobstructed ceiling, light-colored walls, black pendant lights, and large surfaces without visible technical elements.
In this context, installing an HVAC appliance imposes another constraint: to prevent it from becoming visually dominant.
The MIDEA35 has a relatively understated white front panel. Once installed high on the wall, it blends more easily with a light-colored wall and allows the room’s decorative elements to retain their importance.
This is something homeowners regularly mention to us when planning a wall-mounted heat pump installationPerformance matters, but no one wants a new appliance to completely change the appearance of a bedroom, living room, or open space.
In our work, the best location is therefore often a carefully considered compromise between performance, accessibility, and visual integration.
Behind this streamlined installation are several essential connections
The front panel of the MIDEA35 is the only part of the system that the homeowner sees daily inside the room.
Yet its operation relies on several connections between the indoor unit and the outdoor unit:
- refrigerant lines;
- communication wiring;
- electrical supply according to the configuration;
- condensate drainage.
One of the advantages of a ductless system is precisely that it allows this connection without building a network of ducts throughout the residence. Midea indicates that the indoor unit can be connected to the outdoor unit through a relatively small opening in the building, which limits demolition, repair, and painting work.
For a property in Howick where the goal is to modernize the heating and air conditioning without undertaking a complete interior transformation, this ductless design offers a very practical advantage.
The drain slope: an invisible detail that can determine the quality of the installation
On a hot and humid day, a heat pump does more than cool the air: it also removes moisture.
This moisture turns into condensate in the indoor unit. The water must then be discharged properly.
A visually clean installation can become problematic if the drainage has not been planned properly.
We therefore pay particular attention to the drain route and its slope. When gravity drainage is possible, we generally look for a simple, reliable route. When the building configuration requires a different solution, it must be planned before finalizing the evaporator’s location.
This is the kind of detail that does not appear in the final photo, but directly contributes to the reliability of an HVAC installation in Howick.
MIDEA35: a heat pump designed for Quebec’s temperature swings
The MIDEA35 presented in the manufacturer’s documentation belongs to Midea’s premium wall-mounted range.
The series uses the refrigerant R-454B, is identified as Cold Climate V6.1 and features a stated heating operating range down to -30 °C. Depending on the capacity selected, performance reaches up to 33.3 SEER2 in cooling mode and up to 22.0 HSPF2 IV in heating mode.
For Howick and Montérégie, this low-temperature operating capacity is particularly relevant.
MIDEA35 is available in several capacities
It is important to clarify that MIDEA35 is not a single heat pump with a single capacity.
The brochure presents three combinations:
| MIDEA35 configuration | Rated cooling | Rated heating | SEER2 | HSPF2 IV | AHRI |
|---|---|---|---|---|---|
| MSESU-H09B-2A + MO1SS-H09B-2A | 9,000 BTU/h | 12,000 BTU/h | 33,3 | 22,0 | 215471386 |
| MSESU-H12B-2A + MO1SS-H12B-2A | 12,000 BTU/h | 12,000 BTU/h | 29,4 | 14,5 | 215471387 |
| MSESU-H18B-2A + MO1SS-H18B-2A | 18,000 BTU/h | 20,000 BTU/h | 25,6 | 16,2 | 215471388 |
The photo of this installation in Howick does not show the complete model number clearly enough to confirm the exact capacity. We therefore prefer not to arbitrarily assign 9,000, 12,000, or 18,000 BTU/h to the photographed unit.
This clarification is important when a homeowner compares several wall-mounted heat pumps. The maximum performance of a series does not necessarily correspond to every available capacity.
What the MIDEA35 can deliver when the temperature reaches -15 °C
For Quebec’s climate, one of the most useful data points is the heating capacity when the outdoor temperature drops significantly.
At -15 °C, Midea indicates:
- 13,500 BTU/h for the 9,000 BTU/h configuration in cooling mode;
- 13,500 BTU/h for the 12,000 BTU/h configuration;
- 22,600 BTU/h for the 18,000 BTU/h configuration.
The manufacturer also indicates a heating operating range down to -30 °C for all three configurations.
These figures are more useful than simply stating “operates at -30 °C.”
A minimum operating temperature indicates the range in which the unit is designed to operate. It does not mean that its capacity or efficiency remains exactly the same at all temperatures.
Why proper sizing remains essential in Howick
A larger heat pump is not automatically a better heat pump.
We analyze the residence’s needs before selecting the capacity, particularly based on:
- the area served;
- insulation;
- fenestration;
- the building’s orientation;
- air infiltration;
- ceiling height;
- the layout of the rooms;
- the existing heating system;
- the desired indoor temperature.
An oversized unit may operate differently from a system properly matched to the building’s actual load.
For this reason, we do not choose a MIDEA35 in Howick solely according to a quick square-foot-per-BTU ratio.
Variable-speed technology plays an important role in comfort
The Midea series uses variable-speed technology that allows the compressor to adapt its operation to changing demand.
Midea explains that this modulation reduces the large temperature variations associated with conventional systems that operate in on-off cycles.
In practice, when a room approaches its set temperature, the heat pump does not necessarily need to continue operating at its maximum level.
It can modulate its operation to maintain comfort more gradually.
In a room like the one shown in our photo, with a large open wall area and unobstructed airflow, this modulation and airflow control can work together to maintain a more even temperature.
Up to 19 or 16 dB(A), depending on capacity
Indoor noise is particularly important when a heat pump is installed in a bedroom or near an area used for several hours.
The MIDEA35 technical sheet indicates indoor sound levels that can drop to approximately 19 dB(A) for the 9,000 and 12,000 BTU/h configurations, and up to 16 dB(A) for the 18,000 BTU/h version according to the operating setting indicated by the manufacturer.
The heat pump photographed in Howick is located in a room where aesthetics and comfort seem closely connected. Quiet indoor operation is therefore a tangible advantage, particularly when the system needs to remain active overnight.
Features that make perfect sense in a room occupied every day
The MIDEA35 series offers, among other things:
- ECO mode;
- Turbo function;
- night mode;
- timer;
- function Follow Me;
- automatic cleaning;
- silent mode;
- 8°C heating;
- horizontal swing;
- vertical swing;
- fan control from 1% to 100%;
- Wi-Fi;
- smart sensor;
- humidity control;
- optional wired controller.
The function Follow Mefor example, uses the remote control’s temperature sensor to provide the unit with a more representative measurement of the area where it is located. The brochure explains that this feature helps adjust the room temperature more precisely.
In a large room, the sensor located in the evaporator and the area actually occupied may sometimes perceive slightly different conditions. This type of function provides greater flexibility.
R-454B and A2L technology: a new generation of installation
The MIDEA35 operates with R-454B refrigerant, classified as A2L.
Midea documentation also mentions an A2L refrigerant leak detection sensor and an associated dispersion system on the applicable series.
This influences the methods used by our technicians during installation and commissioning.
Refrigerant connections, leak tightness, evacuation, and all procedures must be performed with equipment and methods appropriate for the installed system.
Piping dimensions change according to capacity
Another important detail concerns the refrigeration circuit.
The MIDEA35 versions for 9,000 and 12,000 BTU/h use line sets measuring 1/4 in. and 3/8 in.version has a specified maximum length of 82 ft.
The 18,000 BTU/h uses 3/8 in. and 5/8 in. and allows a maximum length of up to 164 ft.
This point becomes particularly important when a new heat pump replaces an old wall-mounted air conditioner.
We do not automatically reuse an old line set simply because it is already in the wall. Its dimensions, condition, and compatibility with the new combination must first be checked.
The electrical requirements must also match the exact machine
All three MIDEA35 configurations in the brochure are powered by 208/230 V, single-phase, 60 Hz.
For the outdoor unit, Midea specifies:
- 16 A minimum circuit ampacity and 20 A maximum overcurrent protection for the 9,000 and 12,000 BTU/h versions;
- 24.9 A minimum circuit ampacity and 25 A maximum overcurrent protection for the 18,000 BTU/h version.
The electrical installation must therefore be determined based on the exact model data, not on an approximate rule based solely on nominal capacity.
An easy-to-live-with heat pump should also remain easy to maintain
In the photo of the Howick job site Howick, the indoor unit remains accessible from the room.
This is important because the filters will need to be removed and cleaned periodically.
The MIDEA35 series also offers an interesting feature for more thorough servicing: Midea indicates that the blower wheel can be removed to facilitate cleaning the inside of the unit.
A HVAC maintenance Regular maintenance helps maintain airflow and reduce dust buildup in the unit.
In particular, we recommend not waiting until a filter is completely clogged before cleaning it.
The mistakes we seek to avoid when installing a wall-mounted unit in Howick
This project helps illustrate several important principles.
Installing the unit based solely on appearance
A unit can be perfectly centered on a wall while blowing directly toward an obstacle. We first look for a location that allows good air distribution.
Placing the unit too close to the ceiling
The evaporator must draw in air and remain accessible for maintenance. The clearances specified by the manufacturer must be respected.
Overlooking drainage
Poor condensate drainage can cause problems long after an installation that initially appeared successful.
Choosing too many BTUs “just to be safe”
Sizing must meet the building’s needs, rather than the assumption that bigger automatically means better.
Overlooking the AHRI number
To compare performance and verify any potential eligibility for a financial assistance program, the exact combination of units and its AHRI number are much more reliable than simply using the name MIDEA35.
The three documented combinations carry the AHRI reference numbers 215471386, 215471387 and 215471388.
Eligibility and the amount of financial assistance must be confirmed based on the exact model, project date, and program terms applicable at the time of installation.
A residential warranty that complements the system choice
The Midea brochure presents a 12-year limited warranty on the compressor, 12 years on parts, and 10 years on labor, subject to the conditions applicable to the warranty program.
We recommend carefully keeping the model and serial information as well as proof of installation, particularly when product registration is required.
What this Howick installation best demonstrates
This project accurately represents the way we approach a Howick wall-mounted heat pump installation.
The final result is understated: a white MIDEA35 installed neatly high on a light-colored wall, with its discreet digital display and unobstructed airflow space.
But behind this visual simplicity are all the decisions that truly determine the project’s quality: capacity selection, positioning, airflow, drainage, refrigerant circuit, electrical supply, commissioning, and future serviceability.
At AirGreen, we want the unit to look like it belongs from day one and, above all, to continue operating properly season after season.
The MIDEA35 offers an appealing combination for Howick’s climate: rated operation down to -30°C in heating mode, variable-speed technology, R-454B refrigerant, precise airflow control, advanced comfort modes, and several capacities to adapt the system to the building.
The machine provides the technical capabilities. The HVAC installation determines how they will actually be used in the home.