Installation of a MIDEA MIDEA35 wall-mounted heat pump in the Hinchinbrooke neighborhood
AirGreen installs a MIDEA35 wall-mounted heat pump in the Hinchinbrooke neighborhood: outdoor unit on a balcony bracket, heating down to -30 °C, R-454B, and an HVAC installation adapted to the available space.
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The job on one screen
The unit’s data sheet
The range as published on airgreen.ca: pick a size to see its capacity in deep cold.
| Size | Heating at −8 °C | Heating at −15 °C | Coldest certified point | COP at −15 °C | SEER | HSPF | Indicative LogisVert aid |
|---|---|---|---|---|---|---|---|
| Midea Série 35 9 000 | 11,000 | 13,500 | −30 °C: 7,500 | 2.0 | 33.3 | 14.6 | – |
| Midea Série 35 12 000 | 11,000 | 13,500 | −30 °C: 7,500 | 2.0 | 29.4 | 12.7 | $1,320 |
| Midea Série 35 18 000 | 19,300 | 22,600 | −30 °C: 11,900 | 2.34 | 25.6 | 16.2 | $2,316 |
According to NEEP, its certified maximum capacity at −30 °C (−22 °F) is 7,500 BTU/h, 83% of its nominal 9,000 BTU size.
At 8 °C, its certified maximum capacity reaches 17,200 BTU/h, 91% more than its nominal 9,000 BTU size.
According to NEEP, its certified heating capacity at −15 °C (5 °F) is 13,500 BTU/h, 150% of its nominal 9,000 BTU size. Its COP there is 2.00.
According to NEEP, its certified maximum capacity at −30 °C (−22 °F) is 7,500 BTU/h, 62% of its nominal 12,000 BTU size.
At 8 °C, its certified maximum capacity reaches 17,200 BTU/h, 43% more than its nominal 12,000 BTU size.
According to NEEP, its certified heating capacity at −15 °C (5 °F) is 13,500 BTU/h, 112% of its nominal 12,000 BTU size. Its COP there is 2.00.
According to NEEP, its COP at −15 °C is 2.34: the highest of the Série 35 line, which ranges from 2.00 to 2.00 at that temperature.
According to NEEP, its certified maximum capacity at −30 °C (−22 °F) is 11,900 BTU/h, 66% of its nominal 18,000 BTU size.
At 8 °C, its certified maximum capacity reaches 29,700 BTU/h, 65% more than its nominal 18,000 BTU size.
Data read live from the airgreen.ca page of each size (NEEP / AHRI certified performance). When the title names the installed size, it is highlighted; otherwise the whole range is shown. The aid shown is today’s, using Hydro-Québec’s rule ($120 per 1,000 BTU/h at −8 °C); amounts quoted in the article date from its publication. Only Hydro-Québec confirms the assistance granted.A dash in the aid column: amount to be confirmed for this model.
The article, chapter by chapter
An MIDEA35 installed on a balcony: a compact configuration suited to a property in the Hinchinbrooke neighborhood
This MIDEA MIDEA35 wall-mounted heat pump installation in the Hinchinbrooke neighborhood highlights an essential aspect of a residential HVAC project: the positioning of the outdoor unit. In the photo of our completed installation, the Midea unit is situated on a balcony, between a glass door, a brick façade, and a metal guardrail.
The available space was therefore not unlimited. We had to find a configuration that would maintain adequate airflow around the heat pump and preserve access to the door and balcony, while also allowing for future equipment maintenance.
We installed the outdoor unit on a metal support that holds it above the balcony surface. This detail is particularly important for a heat pump that will be used for heating during the winter. When the unit performs its defrost cycles, water is produced and must be able to drain properly beneath the unit.
The logo is clearly visible on the front of the heat pump Midea, as well as the AirGreen branding. But beyond the final appearance, this photo mainly represents all the preparation work required to successfully complete an HVAC installation in the Hinchinbrooke neighborhood when outdoor space is limited.
The choice of outdoor location is never left to chance
It may be tempting to assume that an outdoor unit can be placed in any space large enough to accommodate it. In practice, we must take several factors into account at the same time.
For this installation in Hinchinbrooke, we had to consider in particular:
- the clearance around the unit;
- the presence of the brick wall;
- the proximity of the glass door;
- the guardrail;
- normal movement on the balcony;
- the airflow direction of the outdoor unit;
- the possibility of carrying out maintenance or repairs;
- the route of the refrigerant lines;
- the drainage of water produced during defrosting;
- the mechanical stability of the assembly.
The goal is therefore not simply to fit the heat pump into the available space. We want it to be able to operate properly in this space for several years.
Why install the outdoor unit on a support?
The photo clearly shows that the unit does not rest directly on the balcony floor.
This support-mounted installation creates clearance beneath the unit. For a heat pump used during the winter in Hinchinbrooke, this space is particularly useful during defrost cycles.
When the outdoor temperature drops, frost can form on the outdoor heat exchanger. The system must periodically remove this frost. The water produced in this way must be able to leave the unit without accumulating directly beneath its base.
A properly selected support also helps to:
- stabilize the unit;
- maintain separation from water present on the balcony;
- facilitate drainage;
- limit certain vibrations;
- make the lower section more accessible;
- preventing an accumulation around the base from damaging the unit.
For us, this part of the installation is an integral part of the system’s performance.
A brick façade requiring methodical installation
The brick wall behind the MIDEA35 is another important feature of this project.
When a wall-mounted heat pump is installed in a property with a masonry façade, we must plan the route between the indoor and outdoor units precisely.
The refrigerant lines, wiring, and condensate drain must be routed with as few unnecessary detours as possible while respecting the building’s structure and finishes.
Midea’s ductless design makes this type of project easier. According to the manufacturer’s documentation, the indoor unit is connected to the outdoor unit through a relatively compact wall opening, avoiding the installation of a complete ventilation duct network.
In an existing property in Hinchinbrooke area, this flexibility can make it possible to modernize heating and cooling without undertaking major interior renovations.
Airflow around the outdoor unit
The large circular grille visible on the front of the heat pump is obviously not decorative. It allows the fan to move a large volume of air through the outdoor heat exchanger.
It is therefore essential that this air be able to leave the unit freely.
In a space like this, with a railing and a nearby wall, we must avoid a configuration in which the expelled air would be immediately redirected toward the unit. Excessive recirculation can reduce the system’s ability to transfer heat efficiently.
After installation, we also recommend that the owner keep the space in front of the unit as clear as possible.
It is best to avoid placing the following there:
- balcony furniture;
- large containers;
- storage bins;
- solid decorative panels;
- very dense plants;
- objects that could be moved against the grille.
The outdoor unit needs space to operate.
A side-discharge design suited to tight spaces
Midea presents its side-discharge outdoor units as compact equipment that can be integrated, particularly into patios, terraces, rooftops, and balconies.
This is precisely one of the advantages of this configuration for an installation such as this one in Hinchinbrooke.
A larger unit or one with a different geometry could significantly reduce the usable space on the balcony. Here, the equipment's relatively slim form makes it easier to integrate near the façade while leaving the rest of the area accessible.
Why the MIDEA35 is a particularly interesting heat pump for Hinchinbrooke
Heating down to -30°C
The MIDEA35 is presented in Midea documentation as a premium wall-mounted series of the extreme heat pump.
It uses R-454B refrigerant and is identified as Cold Climate V6.1.
The three capacities in the series presented in the brochure are designed to operate in heating mode down to an outdoor temperature of -30°C. The advertised cooling range extends up to 50°C.
For an installation in Hinchinbrooke area, making it much more relevant than a simple cooling rating.
A heat pump in Quebec must be evaluated based on its performance in January as well as in July.
Three capacities available in the MIDEA35 series
The nameplate of the photographed unit is not legible enough to identify the exact installed capacity with certainty. We therefore prefer not to arbitrarily assign a BTU rating to this project.
The MIDEA35 series presented by the manufacturer includes:
- 9,000 BTU/h in cooling;
- 12,000 BTU/h in cooling;
- 18,000 BTU/h in cooling.
The corresponding indoor units are the MSESU-H09B-2A, MSESU-H12B-2A, and MSESU-H18B-2A. The outdoor units are respectively the MO1SS-H09B-2A, MO1SS-H12B-2A, and MO1SS-H18B-2A.
The associated AHRI numbers are 215471386, 215471387, and 215471388.
This distinction is important because energy efficiency, unit dimensions, and installation requirements vary by capacity.
Up to 33.3 SEER2
The series can achieve a particularly high rating of 33.3 SEER2, but this maximum efficiency applies to the 9,000 BTU version.
The values shown in the Midea specification sheet are:
- 9,000 BTU: 33.3 SEER2;
- 12,000 BTU: 29.4 SEER2;
- 18,000 BTU: 25.6 SEER2.
For heating, the HSPF2 IV values are respectively 22.0, 14.5, and 16.2.
That is why we always distinguish between the performance advertised for a series and that of the specific combination installed at the customer's property.
What the MIDEA35 delivers at -15°C
A particularly interesting data point for a homeowner of Hinchinbrooke refers to heating capacity when the outdoor temperature reaches -15°C.
Midea documentation states:
MIDEA35 9,000 BTU
13,500 BTU/h of nominal heating capacity at -15°C, with a COP of 3.60.
MIDEA35 12,000 BTU
13,500 BTU/h at -15°C, also with a COP of 3.60.
MIDEA35 18,000 BTU
22,600 BTU/h at −15 °C, with a stated COP of 4.40.
For us, this type of data is much more useful when evaluating a heat pump intended to genuinely heat a residence during the winter.
The variable-speed compressor improves comfort stability
Variable-speed technology allows the MIDEA35 to adjust its operation according to the heating or cooling demand.
Rather than constantly alternating between full capacity and complete shutdown, the compressor can operate at a reduced output when the room’s needs decrease.
Midea indicates that this technology is intended to limit temperature variations and provide more stable operation than a conventional on-off system.
This characteristic reinforces the importance of proper sizing.
Systematically installing the largest possible heat pump is not our approach. We want to select a capacity suited to the building’s thermal load so the system can fully benefit from its modulation.
The outdoor unit’s dimensions directly influence the project
On a balcony like this, every inch can matter.
The MIDEA35 versions 9,000 and 12,000 BTU have outer dimensions of approximately:
35.04 in wide × 13.46 in deep × 26.50 in high.
The version 18,000 BTU is larger:
37.24 in × 16.14 in × 31.89 in.
The difference may seem relatively small on paper, but in a space limited by a door and a railing, it can determine the best available location.
We therefore always confirm the model before finalizing the outdoor layout.
The line diameters are not identical for all MIDEA35 units
Another important technical detail concerns the refrigerant lines.
For the 9,000 and 12,000 BTU, Midea specifies liquid/gas lines measuring 1/4 in and 3/8 in.
For the 18,000 BTU, the diameters increase to 3/8 in and 5/8 in.
The stated maximum lengths are 82 ft for the 9,000 and 12,000 BTU models and 164 ft for the 18,000 BTU model.
This difference becomes particularly important when replacing an old heat pump in a property in Hinchinbrooke.
The presence of existing lines does not automatically mean they are compatible with the new appliance.
A power supply suitable for the installed model
All three MIDEA35 units use a 208/230 V, single-phase, 60 Hz.
The minimum allowable amperage specified by Midea for the outdoor unit is:
- 16 A for the 9,000 BTU model;
- 16 A for the 12,000 BTU unit;
- 24.9 A for the 18,000 BTU unit.
The maximum specified protection ratings are respectively 20 A, 20 A, and 25 A.
A heat pump installation in Hinchinbrooke therefore requires a thorough electrical inspection before commissioning.
Outdoor noise: particularly important near a door or balcony
In this project, the outdoor unit is located directly near a glass door.
The sound level therefore deserves particular attention.
Midea indicates a maximum outdoor sound level at high speed of 57 dB(A) for the 9,000 and 12,000 BTU models, and 61.5 dB(A) for the 18,000 BTU version.
The quality of the support also affects comfort. A firmly installed and properly leveled unit helps limit unnecessary vibrations transmitted to the balcony structure.
An indoor unit designed to operate quietly
Indoors, the MIDEA35 units can reach particularly low sound levels.
The documentation mentions up to 19 dB(A) in silent mode for the 9,000 and 12,000 BTU models, and up to 16 dB(A) for the 18,000 BTU version.
The series also offers up to 100 airflow adjustment levels, allowing the indoor fan to be adjusted gradually. SmartHome control and Wi-Fi are also available depending on the configuration.
Practical features for everyday use
The MIDEA35 offers, among other features:
- ECO mode;
- night mode;
- silent mode;
- the timer;
- the “Follow Me” function;
- horizontal swing;
- vertical swing;
- 8°C heating;
- automatic cleaning;
- humidity control;
- different fan speed levels.
The “Follow Me” mode allows the temperature sensor built into the remote control to be used so that the unit can adjust comfort more precisely based on the temperature measured near the user.
A design that also makes maintenance easier
Midea indicates that the indoor blower wheel can be removed to facilitate deep cleaning of the unit.
This is a practical advantage.
A heat pump used for heating and cooling circulates a great deal of air over the course of a year. Even with regularly maintained filters, dust can gradually accumulate on certain internal components.
We therefore recommend consideringHVAC maintenance as soon as the equipment is selected and installed, not only when the system begins to experience a problem.
Eligibility for rebates must be verified using the exact AHRI number
The three MIDEA35 configurations presented in the documentation have distinct AHRI references:
- 215471386;
- 215471387;
- 215471388.
When a homeowner Hinchinbrooke area wishes to verify financial assistance available for their project, we use the exact installed combination.
The potential amount should never be determined solely from the name “MIDEA35.” The capacity, indoor and outdoor models, AHRI number, and program terms applicable at the time of installation must be verified.
The residential warranty advertised by Midea
The Midea brochure provided indicates a 12-year limited residential warranty on the compressor, 12 years on parts, and 10 years on labor. The application and registration conditions must be verified for the equipment concerned.
We therefore recommend keeping the installation documents, along with the model and serial numbers of each unit.
What we check before completing an installation in Hinchinbrooke
Once the MIDEA35 is connected, our work does not simply consist of powering on the unit and confirming that the fan is running.
We specifically check:
- the stability of the outdoor unit on its bracket;
- air circulation around the unit;
- the operation of the indoor and outdoor units;
- the refrigerant connections;
- condensate and defrost water drainage;
- the electrical connections;
- communication between the two units;
- the absence of abnormal noise or vibration;
- operation in heating and cooling modes;
- the accessibility of the equipment for future maintenance.
This final step is essential for turning a physically completed installation into an HVAC system that is truly ready for use.
This Hinchinbrooke project shows why installation details matter just as much as the choice of heat pump
In the final photo, the result looks simple: a Midea outdoor unit neatly installed in front of a brick facade.
In reality, several constraints had to be taken into account: the balcony, the glass door, the railing, the unit’s height, the metal bracket, air circulation, vibrations, and water drainage in winter.
This is precisely the kind of situation that demonstrates the importance of a professional wall-mounted heat pump installation in Hinchinbrooke.
A MIDEA35 can deliver excellent performance on paper, including operation down to -30°C, performance of up to 33.3 SEER2, variable-speed technology, and very quiet indoor operation. But all these features must be accompanied by an installation that meets the equipment’s actual needs.
At AirGreen, our approach is to look at the building before looking only at the heat pump unit.
We analyze the location, physical constraints, required capacity, piping, electricity, drainage, noise, and future maintenance.
This MIDEA35 installation in the Hinchinbrooke neighborhood is a concrete example: a compact outdoor configuration integrated into an existing balcony, with the equipment elevated and positioned to preserve adequate operating space.
The job tools
Two quick checks with real numbers: what heat costs, and what your current heaters add up to in BTU/h.
Baseboards and electric furnaces turn 1 kWh of electricity into 1 kWh of heat. A heat pump delivers more: that is its COP. At Hydro-Québec’s rate D (11.142¢/kWh above 40 kWh a day, since 1 April 2026):
Hydro-Québec: a heat pump can be up to three times more efficient than baseboards for heating in the colder months.
Estimate per kWh of heat, at the chosen temperature, using the certified COP from the product page. Taxes, access charge and backup heat not included.
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).