Installation of a MIDEA EVOX G3 3-ton central heat pump in Dollard-des-Ormeaux
Complete installation of a 3-ton MIDEA EVOX G3 central heat pump in Dollard-des-Ormeaux. Performance, energy efficiency, and optimal comfort with AirGreen.
Take a tour of the installation
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.
It captures or rejects heat outside. It sits on a level base, above the snow, with free space all around.
The insulated refrigerant lines enter the house through a sealed opening and run to the indoor coil.
A shut-off switch near the outdoor unit isolates it safely for service.
Sitting on the indoor module, it moves heat between the house air and the refrigerant.
Electric furnace or air handler: its fan pushes air through the ducts. The electric backup takes over in extreme cold.
Supply ducts bring air to the rooms; returns bring it back to the unit. Their condition matters as much as the unit's.
It protects the coil and the fan. A dirty filter cuts airflow, so it gets checked regularly.
It runs the heat pump and the backup heat. It must be compatible with the installed system.
A high-performance HVAC solution designed for the harsh winters of the West Island
At AirGreen, we recently completed a complete HVAC installation in Dollard-des-Ormeaux, in a single-family home that required serious energy modernization. The client was looking for a solution capable of ensuring reliable heating in winter, efficient air conditioning in summer, and above all, tangible reductions in energy costs. Our recommendation naturally led to the MIDEA EVOX G3 3-ton central heat pump, a system known for its robustness and performance in cold climates.
From the first technical visit, several elements caught our attention: an old central system, uneven air distribution between floors, and high energy consumption. The objective was clear: to provide a modern, high-performance, and durable system, perfectly adapted to the climatic conditions of Montreal and the West Shore.
Technical analysis and site preparation
Comprehensive evaluation of the existing system
Before any installation, we conducted a detailed inspection:
- Verification of the condition of existing ducts
- Analysis of heat loss in the building envelope
- Precise calculation of the thermal load
- Inspection of the electrical panel (220V compatibility)
This step is essential to ensure that the central heat pump operates at its full potential. In this specific case, the ducts were in good condition but required thorough cleaning and some adjustments to optimize airflow.
Strategic choice of the MIDEA EVOX G3 model
The choice of the MIDEA EVOX G3 3-ton (36,000 BTU) model was made for several reasons:
- Heating capacity down to -30°C
- ENERGY STAR® (cold climate) certification
- Solid energy efficiency:
- SEER2: 17.7
- HSPF2: 10.0
- EER2: 12.0
- Eco-friendly refrigerant R-454B
- Inverter technology for intelligent modulation
This model offers an excellent balance between performance, reliability, and energy efficiency, particularly sought after in areas like Laval, Longueuil, the North Shore, and the South Shore.
Installation process in Dollard-des-Ormeaux
Outdoor unit installation
The outdoor unit was installed on robust wall brackets, as shown on the worksite. This type of mounting offers several advantages:
- Protection against snow accumulation
- Reduction of ground vibrations
- Improved equipment durability
We also ensured:
- Compliance with recommended clearances
- Optimized airflow around the unit
- Minimized visual impact on the facade
Refrigerant and electrical connections
The tubing (3/8 - 3/4) was carefully installed and insulated to prevent heat loss. Our refrigeration technicians performed:
- A complete vacuum pull (stable micron test)
- A pressure leak test
- Mechanical protection of lines
On the electrical side:
- Connection to 220V
- Secure installation with dedicated circuit breaker
- Complete verification of connections
Indoor unit installation
The indoor unit (air handler) was installed in the existing technical space. Thanks to its compact design:
- Easy integration into a confined space
- Simplified access for HVAC maintenance
- Compatibility with high-efficiency filters (MERV 13)
We also optimized air distribution to ensure uniform temperature in all rooms.
Challenges encountered and solutions provided
Limited access to the exterior wall
The main challenge on this project was restricted access for wall mounting. Our team used:
- Reinforced adjustable brackets
- Mounting techniques adapted to the structure
- Specialized equipment for precise positioning
Result: a solid, aesthetic, and durable installation.
Airflow optimization
The previous system had pressure imbalances in the ducts. We:
- Adjusted ventilation registers
- Thoroughly cleaned the ducts
- Calibrated the system with Constant Airflow 2.0 technology
This resulted in homogeneous air distribution throughout the house.
Actual performance after installation
Upon commissioning, the results were immediate:
- Uniform heating in all rooms
- Reduced noise compared to the old system
- Rapid system responsiveness thanks to the Inverter
- Better humidity control
The client particularly appreciated:
- Consistent thermal comfort
- Ease of use via integrated WiFi
- Anticipated reduction in energy bills
Concrete advantages of the MIDEA EVOX G3
Year-round comfort
The MIDEA EVOX G3 central heat pump ensures:
- Efficient heating even in extreme cold
- Stable air conditioning during humid summers
- Constant temperature without fluctuations
Energy efficiency
Thanks to its high efficiency:
- Significant reduction in electricity costs
- Better consumption management
- Accelerated return on investment
Reduced environmental impact
The R-454B refrigerant allows for:
- Reduced global warming potential
- A more environmentally friendly solution
Available subsidies in Dollard-des-Ormeaux
This project is eligible for the LogisVert subsidy, which can reach $3720 (according to current updates). At AirGreen, we assist our clients with all steps:
- Eligibility verification
- Document preparation
- Case follow-up
Practical tips for homeowners
What to avoid
- Undersizing or oversizing the heat pump
- Neglecting the condition of existing ducts
- Choosing a non-certified installer
Recommended best practices
- Conduct a comprehensive evaluation before installation
- Opt for a model adapted to the Quebec climate
- Plan annual HVAC maintenance
Why trust AirGreen for your HVAC installation
Our approach is based on rigorous standards:
- Detailed on-site technical analysis
- Installation carried out by certified refrigeration technicians
- Total cost transparency
- Fast and reliable after-sales service
We operate daily in Montreal, Laval, Longueuil, on the North Shore, and the South Shore, with proven expertise in central systems.
Conclusion: A durable and high-performance installation in Dollard-des-Ormeaux
This MIDEA EVOX G3 central heat pump installation project perfectly demonstrates the importance of a professional approach to HVAC. By combining advanced technology, precise installation, and rigorous analysis, we have enabled this client to benefit from optimal comfort all year round.
For any central heat pump installation in Montreal or its surroundings, our team at AirGreen offers tailored, reliable, and durable solutions, designed for Quebec's climatic realities.
The unit on this job, in figures
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 EVOX G3 · 1.5 tons | 14,700 | 18,600 | −30 °C: 11,800 | 2.12 | 19.0 | 10.1 | $1,764 |
| Midea EVOX G3 · 2 tons | 20,800 | 20,600 | −30 °C: 12,100 | 2.14 | 18.6 | 10.0 | $2,496 |
| Midea EVOX G3 · 2.5 tons | 24,000 | 33,200 | −30 °C: 17,900 | 1.97 | 17.2 | 10.8 | $2,880 |
| Midea EVOX G3 · 3 tons | 33,000 | 37,400 | −30 °C: 27,600 | 1.9 | 18.0 | 10.0 | $3,960 |
| Midea EVOX G3 · 4 tons | 39,500 | 48,000 | −30 °C: 27,200 | 2.0 | 17.5 | 9.5 | $4,740 |
| Midea EVOX G3 · 5 tons | 45,000 | 54,000 | −30 °C: 37,300 | 1.9 | 17.5 | 9.5 | $5,400 |
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.
The big day, step by step
The main steps of this kind of job at AirGreen. Every house has its quirks: the estimate brings them out.
We look at the ducts, the current indoor module, the electrical panel and the planned spot for the outdoor unit.
The equipment combination, capacity and price, in writing. We check whether the combination qualifies for assistance programs.
Access protected, old unit disconnected and removed when it is being replaced.
Electric furnace or air handler, with its coil, connected to the supply and return ducts.
On a level base, raised above the snow, with free space all around.
Insulated, they enter through a sealed opening and run to the indoor coil.
Dedicated circuits, accessible disconnect, a thermostat that works with the heat pump and the backup heat.
Leak test, vacuum, start-up, airflow check and a test of both modes.
Filter, thermostat, backup heat in extreme cold: what to know before winter.
- The on-site estimateWe look at the ducts, the current indoor module, the electrical panel and the planned spot for the outdoor unit.
- The quoteThe equipment combination, capacity and price, in writing. We check whether the combination qualifies for assistance programs.
- Getting readyAccess protected, old unit disconnected and removed when it is being replaced.
- The indoor moduleElectric furnace or air handler, with its coil, connected to the supply and return ducts.
- The outdoor unitOn a level base, raised above the snow, with free space all around.
- The refrigerant linesInsulated, they enter through a sealed opening and run to the indoor coil.
- Electrical and thermostatDedicated circuits, accessible disconnect, a thermostat that works with the heat pump and the backup heat.
- Tests and start-upLeak test, vacuum, start-up, airflow check and a test of both modes.
- The walkthroughFilter, thermostat, backup heat in extreme cold: what to know before winter.
What would it look like at your place?
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.
Four mistakes we do not make
Flip each card to see what we do instead.
Your own project, step by step
What to do, season by season
Three habits per season for this unit. They take a few minutes and prevent many calls.
- Check the indoor module's filter.
- Clear winter debris from the outdoor unit.
- Test cooling before the heat arrives.
- Check the filter more often in peak season.
- Keep registers and returns clear.
- Watch condensate drainage near the coil.
- Change or clean the filter.
- Test heating and backup heat before the cold.
- Book periodic maintenance.
- Clear snow around the outdoor unit.
- Store nothing in front of the indoor module.
- Note any unusual noise or smell and call us.
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.
Four statements: true or false?
It all comes down to details you have just seen.
1. A central heat pump uses the house's ducts.
It connects to the existing ducts to heat and cool everywhere.
2. In extreme cold, electric backup heat can take over.
The indoor module (furnace or air handler) works with the heat pump and takes over in extreme cold.
3. The filter only gets changed when the unit breaks down.
A dirty filter cuts airflow. It gets checked regularly.
4. You can reuse the old unit's size without checking.
The house may have changed: insulation, windows, added rooms. Capacity is confirmed on site.
0 / 4 right answers
What people ask us about this kind of work
Can I keep my current ducts?
What happens in extreme cold?
Furnace, air handler, ducted: what is the difference?
Are there grants?
Do I need a permit?
How much can I save?
How is the LogisVert assistance calculated?
Will my current thermostat work?
Central or wall units: which one?
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).