In this comfortable duplex in Rosemont–La Petite-Patrie, our clients wanted to replace their aging wall-mounted unit with a modern, high-performance solution that would provide true year-round comfort. We therefore installed a new-generation Midea wall-mounted heat pump , perfectly suited to the climate of Greater Montreal.
Context: Replacing an old wall-mounted unit with a 4-season solution
In the photo, you can still see the imprint of the old device: a large rectangular walled-up opening, a vestige of an old wall-mounted air conditioner that only produced cold air and consumed a lot of electricity.
The owners wanted:
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Enjoy a combined heating and air conditioning system ;
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Gain in silence and aesthetics ;
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Optimize air circulation between floors;
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Preparing the house for Montreal's harsh winters .
After analyzing the configuration of the stairwell and the heating requirements, we recommended a Midea wall-mounted heat pump , model from the Midea28 series, ideal for providing stable comfort all year round with excellent energy efficiency.
Type of system installed: Midea wall-mounted heat pump
The installed system is a Midea wall-mounted heat pump :
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Type : mini wall-mounted split (heating and air conditioning);
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Range : Midea28 series (R-454B), high efficiency;
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Power : typical wall capacity to serve the stairwell and adjacent spaces (living room/floor);
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Use : 4-season comfort, from the bitter cold of winter to the heatwaves of summer.
This Midea range is designed for:
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Providing efficient heating even at very low outside temperatures ;
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Reduce consumption thanks to an inverter compressor that continuously modulates power;
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Maintain a very low noise level , both indoors and outdoors.
Strategic location: an installation in the stairwell
The client had an unobstructed wall facing the stairwell. This is a particularly advantageous location from an HVAC perspective:
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The unit is installed high up , above the area where the old device was located;
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The blown air descends into the stairwell and naturally distributes itself towards:
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The upper floor;
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The lower level (or ground floor), depending on the configuration.
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The advantages of this position:
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Better air distribution : the staircase acts as a circulation "column";
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Consistent comfort between levels;
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Space saving : no furniture is sacrificed and the unit remains visually discreet;
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Safe : the device is out of reach of children and protected from shocks.
Technical details of the indoor installation
The image reveals several elements that indicate a professional setup:
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Precise and perfectly level installation
The Midea unit is aligned with the wall, at a height optimized for:-
allow the blown air to expand without obstruction;
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maintain easy access for filter maintenance and cleaning.
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Managing the old wall opening
The former rectangular cavity was:-
closed and securely resealed;
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ready to be sanded and repainted , for a clean and uniform final result.
This helps to avoid thermal bridges and air or moisture infiltration.
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Passage of refrigerant lines and drain
Even though we can't see the exterior part, we can make out the point where the pipes exit (in the sealed lower right area) which lead to:-
the refrigerant pipes to the outdoor compressor;
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the condensation drain , essential for removing the water produced in air conditioning mode.
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Dedicated electrical connection
The Midea heat pump is powered by a dedicated electrical circuit , compliant with manufacturer requirements and electrical code, ensuring safety and performance.
Technical details of the outdoor installation (not visible in the photo)
Even though the outdoor condenser is not shown in the photo, a typical AirGreen installation for a Midea28 includes:
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A Midea compressor has been installed:
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either on sturdy wall mounts ;
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either on a base on the ground on slabs or anti-vibration blocks;
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Sufficient clearance around the device to ensure good air circulation;
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Insulated covers for refrigerant lines, protecting the pipes from the elements and improving aesthetics;
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Defrosting and water drainage management in winter, to prevent the formation of ice that is harmful to the building.
Comfort, performance and Quebec winter
The Midea28 series wall-mounted heat pump is particularly well-suited to cold climates like that of Montreal:
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Efficient heating in very cold weather
Inverter technology allows the unit to maintain good heating capacity, even when the temperature drops very low. Occupants benefit from stable heating , without sudden surges or abrupt temperature changes. -
Gentle and quiet air conditioning in summer
In summer, the same unit provides very quiet air conditioning , ideal for a stairwell that is often open to bedrooms or the living room. The airflow is adjustable, which prevents direct drafts on the occupants. -
Increased energy efficiency
The Midea28 series is known for its high performance coefficients , which translates to:-
reduced energy bills ;
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a smaller environmental footprint than with a purely electric heating system or an old wall-mounted air conditioner.
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Finish, aesthetics and discretion
The photo clearly shows the clean lines of the Midea wall-mounted head unit:
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Minimalist design, both modern and discreet;
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Temperature display on the front, legible but not visually aggressive;
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Adjustable louvers allow airflow to be adjusted according to occupants' preferences.
Once the plaster and paint touch-ups are completed around the old opening, the wall will regain a uniform appearance, as if the old unit had never existed. The Midea heat pump will then blend seamlessly into the interior, without "stealing the show" from the decor.
The result for the occupants of this Rosemont duplex
Thanks to this Midea wall-mounted heat pump installation in the stairwell:
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The occupants are now enjoying:
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efficient heating in winter;
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efficient air conditioning in summer;
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The system is quiet , comfortable and easy to control;
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Air circulation between floors is significantly improved;
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The old, energy-inefficient wall opening has been eliminated in favor of a modern solution.
At AirGreen , we support our clients in Rosemont–La Petite-Patrie and throughout Greater Montreal in choosing and installing Midea heat pumps adapted to their home, their budget and their priorities (comfort, silence, energy savings).
If you still have an old wall-mounted air conditioner or an inefficient heating system, we can, as shown here, replace it with a Midea wall-mounted heat pump from the Midea28 series , designed for Quebec winters.