In many homes in Sainte-Dorothée , the same scenario plays out: a comfortable residence, but a heating/cooling system that's starting to show its limitations (uneven temperature from room to room, poorly managed humidity, noisy ventilation, rising bills). At AirGreen , we regularly install central heat pumps in this area of Laval because this type of property is ideally suited for an upgrade: existing ductwork, a mechanical room in the basement, and relatively easy access to the plenum and return air.
The photo clearly shows a central indoor unit (air manager) connected to a ductwork system, with a metal plenum and an accessible filtration section (filter in place). This is exactly the kind of clean and efficient installation that allows you to get the most out of a Midea central heat pump.
Why a Midea central heat pump in a house in Sainte-Dorothée?
In Laval, temperature variations are intense: humid days in summer, dry cold in winter, and transitional periods when you sometimes want to heat in the morning and cool in the afternoon. A central heat pump is very well suited to these realities because it:
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It air-conditions the entire house uniformly via the ducts.
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Heats efficiently for much of the Quebec winter (with an electric backup if needed)
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improves comfort on the upper floors (less difference in height between basement, ground floor and bedrooms)
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allows for better air management (filtration, circulation, and humidity control)
In this project, the choice fell on a Midea solution consistent with the needs of a single-family home: the Midea EVOX G3 (central range with R-454B ), a model recognized for its residential compatibility, seasonal performance and technological modernity.
What the installation reveals (and what it says about the quality of the work)
Even without seeing the exterior unit, the interior gives us many clues about how the system was designed.
1) A central air management system well integrated into the ductwork
We observe a vertical cabinet (central indoor unit) directly connected to a galvanized sheet metal distribution plenum . This indicates an installation designed for:
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limit air loss
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ensure good static pressure
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distribute air conditioning and heating in a stable manner
The joints and transitions are clean and reinforced, with an aluminum seal (metal tape), which is essential to prevent micro-leaks that impair performance.
2) A simple and realistic filtration access
We see an open filter hatch with a filter installed (blue). This is a crucial point: a central heat pump only performs if the airflow is maintained.
At AirGreen, they emphasize:
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an accessible filtration system (so that the customer can easily change the filter)
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a standard size (available at hardware stores)
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A clear reminder: clean filter = better efficiency + less risk of frost, noise and premature wear
3) A typical Laval mechanical room: compact, but functional
The presence of the water heater nearby confirms a typical suburban home mechanical room. Here, the challenge is often space : clearances must be respected, access to the filtration system and service panels maintained, and the routing of ducts/connections organized without creating obstructions.
In this type of context, our approach is simple:
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plan the unit's orientation for maintenance
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secure access to the filter and connections
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maintain a clear path around equipment (water heaters, drains, electrical panels)
Midea EVOX G3: what is this model used for, in practical terms?
The Midea EVOX G3 (central heat pump) is designed for homeowners who want to upgrade a central system without resorting to an overly complex solution. It's an excellent choice when:
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The house already has pipes
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We want a central air conditioning system that is more stable than a wall-mounted one.
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We want to reduce our reliance on electric heating (depending on the configuration).
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We are looking for a balance between comfort, performance and overall cost
Comfort: what we feel on a daily basis
Once the system is properly calibrated, the difference is tangible:
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more constant temperature in the rooms
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Fewer abrupt cycles (more regular breathing)
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decrease in the “cold air current” typical of older, poorly balanced systems
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improved feeling of comfort even at the same temperature setting (better air distribution)
Yield: what you see on the invoices
A modern, properly sized, and correctly installed central heat pump can reduce costs during the shoulder seasons and for much of the winter (depending on the house's characteristics, insulation, and usage). However, the real savings come primarily from:
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the sealing of the duct network
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the correct airflow
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the quality of the installation (drainage, charging, commissioning, balancing)
And that's exactly where AirGreen's expertise makes a difference.
Key technical points that we systematically check on this type of installation
Even if the unit looks “simple,” a central heat pump doesn't forgive shortcuts. Here's what we always secure:
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Airflow (CFM) : Fan adjustment and static pressure validation
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Air return dimensions : to avoid a noisy or "muffled" system
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Pipe sealing : sealing joints, clean transitions, leak reduction
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Filtering : good format + easy access + clear recommendations
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Condensate drain : correct slope, backflow protection, safety
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Vibrations and noise : fastening, supports, and resonance management in sheet metal
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Complete commissioning : parameter verification, heating/cooling test, air temperature check and operational stabilization
Common mistakes in homes with ductwork… and how to avoid them
In Sainte-Dorothée (and Laval in general), one often encounters houses where the ducts exist, but have been modified over the years. The result: the system "may work", but not be optimized .
Here are the classic pitfalls:
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Filter too restrictive or forgotten (reduced airflow)
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Undersized return air system (noise, discomfort, reduced efficiency)
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air leaks in the plenum (losses and uneven parts)
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lack of balance (rooms too cold or too hot)
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An installation that blocks access to the service (this will be costly later)
Our goal at AirGreen: an installation that remains efficient in 3 years, 7 years, 10 years — not just “day 1”.
Conclusion: a Midea central heating system designed for lasting comfort
This installation perfectly illustrates our goal: a Midea central heat pump (here, an EVOX G3 ) neatly integrated into a ductwork system, in a typical mechanical room of a Sainte-Dorothée home. When airflow, filtration, and airtightness are taken seriously, the result is a system that:
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heats and cools with stability
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improves comfort throughout the house
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operates more quietly
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maintains its performance over the seasons
At AirGreen, we install this type of central solution in Laval every month, and we know exactly how to adapt it to local realities: family homes, finished basements, compact mechanical rooms, Quebec winters and humid summers.