Installation of a 3-ton MIDEA EVOX G3 central heat pump in Bois-des-Filions: reliable performance for Quebec winters
HVAC installation in Bois-des-Filions: MIDEA EVOX G3 3-ton central heat pump. Performance at -30°C, energy efficiency, and optimal comfort for homes on the North Shore.
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.
Strategic HVAC Installation for Maximized Comfort in Bois-des-Filions
In a quiet residential area of Bois-des-Filions, our AirGreen team recently completed a full HVAC installation of a 3-ton MIDEA EVOX G3 central heat pump. This project perfectly illustrates the real challenges faced by homeowners on the North Shore: replacing an aging system while optimizing thermal comfort, energy consumption, and reliability during periods of extreme cold.
The client wanted a central system capable of maintaining constant heat even below -25°C, while also providing efficient air conditioning in summer. After a rigorous technical evaluation, the MIDEA EVOX G3 36,000 BTU emerged as a perfectly suited solution.
Technical Project Analysis: A Typical House, Very Real Challenges
Initial Inspection and Observed Constraints
During our on-site visit, several elements caught our attention:
- Existing central system partially inefficient
- Uneven air distribution between floors
- Limited mechanical space in the basement
- Outdoor support to be adapted for secure wall mounting
The outdoor unit was installed on a robust wall mount (visible in the photo), which allows for:
- Better protection against accumulated snow
- Reduced ground vibrations
- Optimized air circulation
This type of installation is common in areas like Laval, Bois-des-Filions, or certain parts of Montreal, where ground space is limited or exposed.
Why the MIDEA EVOX G3 Central Heat Pump is a Smart Choice
Extreme Heating Performance
The MIDEA EVOX G3 is designed for Quebec's climate:
- Efficient heating down to -30°C
- Stable performance maintained at low temperatures
- Inverter technology for intelligent modulation
In this project, it means a comfortable home without excessive reliance on auxiliary heating.
Certified Energy Efficiency
The technical specifications speak for themselves:
- SEER2: 17.7
- HSPF2: 10.0
- ENERGY STAR® Cold Climate
Concrete results for the client:
- Significant reduction in energy costs
- Uniform temperature throughout the house
- Fewer on/off cycles, thus greater durability
Key Installation Steps by AirGreen
1. Preparation and Planning
Before any installation, we:
- Verified existing ducts
- Confirmed electrical compatibility (220V)
- Planned the optimal positioning of the outdoor unit
2. Outdoor Unit Installation
The MIDEA EVOX G3 unit was securely fastened to a metal wall mount:
- Precise alignment to prevent vibrations
- Sufficient clearance for optimal ventilation
- Protection against snow accumulation
3. Indoor Unit Integration
The indoor unit (model MAUSE-H36B-2A) was installed in the technical space:
- Connection to existing ducts
- Airflow optimization
- Ventilation system calibration
4. Refrigerant Connection and Testing
- Precisely installed 3/8 – 3/4 piping
- Full leak test
- Vacuum pull to ensure durability
5. Commissioning and Calibration
- Airflow verification
- Thermostat calibration
- Testing in heating and cooling modes
Modern Technology Adapted to Current Needs
Ecological Refrigerant R-454B
The MIDEA EVOX G3 uses R-454B, a gas that is:
- Less polluting than previous generations
- Compliant with new environmental standards
- Ideal for energy transition projects
Integrated WiFi and Smart Control
The client also benefits from:
- Remote control via application
- Customizable programming
- Energy consumption monitoring
Concrete Results After Installation
From the first days of use, the improvements were evident:
- Stable temperature in all rooms
- Noise reduction compared to the old system
- Softer and more uniform heating
In similar projects in Longueuil and Laval, our clients report:
- Up to 30% energy savings
- Improved indoor air quality
- Significant reduction in temperature fluctuations
Available Subsidy: A Major Advantage
For this installation, the client is eligible for the LogisVert subsidy:
- Amount up to $3720
- Applicable to ENERGY STAR® Cold Climate systems
- Simple processing with final invoice
At AirGreen, we assist our clients with:
- Eligibility validation
- Document preparation
- Application follow-up
Expert Advice for Homeowners
Choosing the Right Capacity
A common mistake is oversizing or undersizing:
- 3 tons = ideal for medium to large homes
- Essential thermal analysis before installation
Importance of Professional Installation
Even the best machine can underperform if:
- The installation is poorly done
- The vacuum is neglected
- The ducts are poorly balanced
At AirGreen, every detail matters.
Recommended Maintenance
To ensure longevity:
- Annual cleaning
- System check
- Filter replacement
Why Trust AirGreen for Your HVAC Installation
We have carried out dozens of central heat pump installations in:
- Montreal
- Laval
- Longueuil
- North Shore
- South Shore
Our approach is based on:
- A precise and honest evaluation
- A rigorous installation
- A reliable after-sales service
Each project is treated as a long-term investment for our clients.
Conclusion: A Sustainable Solution for Year-Round Comfort
The installation of this MIDEA EVOX G3 central heat pump in Bois-des-Filions demonstrates that it is possible to combine:
- Performance in extreme winter
- Energy efficiency
- Constant comfort
For homeowners on the North Shore and surrounding areas, this type of system represents a smart transition towards a modern and high-performing HVAC system.
How it goes, from the first call to the end
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 the unit delivers when it is cold
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.
And 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.
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.
Which type of equipment for your project?
Pick what looks like your need.
Four mistakes we do not make
Flip each card to see what we do instead.
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).