A complete HVAC transformation for optimal comfort in Lachine
At AirGreen, every HVAC installation project is an opportunity to demonstrate our technical rigor and deep understanding of Quebec's climatic realities. This intervention carried out in Lachine, in western Montreal, perfectly illustrates our approach: thoroughly analyze, intelligently recommend, and precisely execute.
The mandate was to replace an old, inefficient central system with a MIDEA EVOX G3 3 ton central heat pump , known for its reliability in cold climates and excellent energy efficiency. The client was looking for a solution capable of maintaining a stable temperature in winter while reducing their energy costs.
A residential project with real constraints
Initial assessment and technical challenges
From the first site visit, several challenges were identified:
- An old, inefficient central system
- Limited outdoor space for unit installation
- Uneven airflow in certain areas of the house
- A clear client request: improve comfort without major renovations
We quickly determined that the MIDEA EVOX G3 central heat pump was an ideal solution due to its adaptability to existing systems.
Why this specific model?
The MIDEA EVOX G3 3 tons (36,000 BTU) stood out for several technical reasons:
- Heating capacity down to -30°C, essential for Montreal and the South Shore
- ENERGY STAR® (cold climate) certification
- High efficiency: SEER2 17.7 | HSPF2 10.0 | EER2 12.0
- Eco-friendly refrigerant R-454B
- Inverter technology for intelligent modulation
- Controlled sound level: 62.5 dB(A) outdoor
In addition, the LogisVert grant, which can reach $3720, reinforced the relevance of the choice for the client.
Installation process in Lachine
Outdoor unit installation: precision and durability
The project image clearly shows the installation of the outdoor unit on a solid wall bracket, slightly elevated to:
- Avoid snow accumulation in winter
- Reduce vibrations transmitted to the structure
- Facilitate future maintenance
We took care to:
- Ensure perfect alignment of the unit
- Install mechanical protection for refrigerant lines
- Optimize line routing for a clean aesthetic
Line and drainage management
A critical point in this project was line management:
- 3/8 – 3/4 piping properly insulated
- Sealed and secure wall penetration
- Condensate drainage effectively directed away from foundations
We also performed a complete vacuum pull (micron test) to ensure system integrity and eliminate any moisture in the lines — an essential step often overlooked elsewhere.
Integration with the existing central system
Adaptation without compromise
One of the great advantages of the MIDEA EVOX G3 is its ability to integrate with an existing duct system. In this specific case:
- No major duct replacement was necessary
- Airflow adjustment via Computational Constant Airflow 2.0
- System calibration for uniform distribution
Result: immediate comfort improvement without invasive work.
Airflow optimization
We made several adjustments:
- Register balancing
- Pressure drop verification
- Circulation test in each room
These steps help avoid common errors such as:
- Overheated rooms
- Persistent cold spots
- Unnecessary energy consumption
Observed real-world performance after installation
Improved thermal comfort
From the first days, the client noted:
- Softer, more constant heat
- Elimination of temperature variations
- Better humidity control
Unlike some traditional systems, the central heat pump offers progressive and homogeneous heating.
Reduced energy consumption
Thanks to Inverter technology:
- The compressor adjusts its speed in real-time
- Fewer energy-intensive ON/OFF cycles
- Significant reduction in electricity bills
In this project in Lachine, initial estimates indicate a significant drop in heating costs.
What sets an AirGreen installation apart
A rigorous methodology
Every HVAC installation we perform follows a strict process:
- Complete thermal analysis
- Selection of the appropriate model
- Precise installation compliant with RBQ standards
- Complete tests (pressure, micron, operation)
- Detailed explanation to the client
Details that make a difference
On this project, several elements illustrate our attention to detail:
- Secure fastening of the outdoor unit
- Aesthetic management of cables and conduits
- Weather protection
- Post-installation acoustic verification
These aspects guarantee not only performance but also durability.
Practical advice for homeowners
Choosing the right capacity
A common mistake is oversizing or undersizing the system. For this project:
- 3 tons (36,000 BTU) perfectly suited to the area
- Analysis based on insulation, exposure, and structure
Do not neglect installation
Even the best heat pump can underperform if poorly installed. It is essential to:
- Check the installer's certifications
- Ensure a real micron test
- Demand a complete, not approximate, installation
Think long-term
With:
- 12-12-10 (compressor, parts, labor) warranty
- Available subsidies
- Energy savings
The MIDEA EVOX G3 represents a strategic investment for homeowners in Montreal, Laval, Longueuil, North Shore, and South Shore.
Client feedback
The homeowner in Lachine shared their experience with us:
- Fast and clean installation
- Clear explanations of operation
- Immediate comfort after commissioning
His primary goal — improving winter heating — was fully achieved, while also benefiting from a modern and connected system (WiFi included).
Conclusion: a modern HVAC solution perfectly adapted to Quebec
This MIDEA EVOX G3 central heat pump installation in Lachine demonstrates that it is possible to transform an existing system into a high-performance, economical, and sustainable solution.
At AirGreen, we combine technical expertise, local knowledge, and rigorous execution to deliver tangible results. Whether in Montreal, Laval, Longueuil, on the North Shore, or the South Shore, our goal remains the same: to provide a reliable, efficient, and perfectly adapted HVAC installation for every home.