Installation of a MIDEA EVOX G3 3-ton central heat pump in Sainte-Julie (South Shore)
HVAC Installation in Sainte-Julie: MIDEA EVOX G3 3-ton central heat pump. Optimal comfort, energy efficiency, and available grants on the South Shore and in Montreal.
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The job on one screen
The unit’s data sheet
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 article, chapter by chapter
A Complete Transformation of Thermal Comfort in a Sainte-Julie Residence
At AirGreen, we recently completed a major HVAC installation in Sainte-Julie, on the South Shore of Montreal, involving a MIDEA EVOX G3 3-ton central heat pump. This project perfectly illustrates our approach: rigorous analysis, impeccable technical execution, and a constant focus on optimizing comfort and energy performance.
The client, owner of a single-family home built in the 2000s, wanted to replace an old, inefficient, and noisy central system. The objective was clear: to achieve stable heat in winter, uniform air conditioning in summer, and significantly reduce energy costs.
Why the MIDEA EVOX G3 was the ideal choice for this installation
Performance Adapted to Quebec Winters
The MIDEA EVOX G3 central heat pump stands out for its ability to maintain heating performance down to -30°C, which is essential in a region like Sainte-Julie, where winter temperatures can be extreme.
In this project, we particularly highlighted:
- A cooling capacity of 36,000 BTU
- A SEER2 of 17.7 for remarkable summer efficiency
- An HSPF2 of 10.0, guaranteeing excellent heating performance
- An ENERGY STAR® (Cold Climate) certification
These characteristics allow the system to operate efficiently all year round, without compromise.
An advantageous subsidy for the client
Thanks to the LogisVert program, our client was able to benefit from a subsidy of $3720, making this investment even more relevant. We provided full support for the administrative procedures, thus simplifying the process.
Technical Challenges Encountered on the Sainte-Julie Site
Space Constraints and Duct Optimization
One of the major challenges of this installation was the limited space in the mechanical room. The existing system occupied a poorly optimized configuration, with unbalanced ducts.
Our team had to:
- Partially reconfigure the ductwork
- Adapt the indoor unit for optimal maintenance access
- Ensure homogeneous air circulation throughout the house
Thanks to the compact design of the MIDEA EVOX G3, we were able to integrate the system without compromising performance.
Outdoor Unit Installation: Stability and Durability
As seen in the installation, the outdoor unit was mounted on robust wall brackets, which allows for:
- Better protection against snow accumulation
- Reduced vibrations transmitted to the building
- Increased system durability
We also made sure to:
- Install a secure electrical supply
- Optimize tubing passage (3/8 – 3/4)
- Perform a complete vacuum pull with micron test
AirGreen Installation Process: Precision and Rigor
Every central heat pump installation carried out by our team follows a strict protocol:
Key project steps
-
Free on-site evaluation
- Complete thermal analysis
- Verification of existing ductwork
- Precise load calculation
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Technical preparation
- Choice of optimal location
- Planning of electrical and refrigeration connections
-
Installation
- Installation of indoor and outdoor units
- Connection of refrigeration lines
- Leak test and vacuum pull
-
Commissioning
- System calibration
- Performance verification
- Full explanation to the client
Results Achieved: Comfort, Silence, and Savings
Immediate Improvement in Comfort
From the first days following installation, the client noticed:
- A uniform temperature in all rooms
- A significant reduction in noise
- Better humidity management
Reduced Energy Costs
Thanks to Inverter technology and the more ecological R-454B refrigerant, the system continuously adjusts its power, which leads to:
- Fewer on/off cycles
- Optimized energy consumption
- A reduced monthly bill
Real Customer Testimonial (Summary)
The owner particularly appreciated:
- The stability of heating even in very cold weather
- The quiet operation of the outdoor unit
- Intelligent control via WiFi
This type of feedback is consistent in our central heat pump installations in Laval, Longueuil, and Montreal, confirming the reliability of the model.
Practical Advice for Homeowners in Sainte-Julie and on the South Shore
What to Avoid
- Choosing an undersized heat pump
- Neglecting the condition of existing ducts
- Ignoring the importance of professional installation
What We Recommend
- Opt for an ENERGY STAR® certified system
- Check eligibility for subsidies
- Call on a specialized HVAC installation contractor
A Sustainable Solution for Homes in Greater Montreal
The MIDEA EVOX G3 central heat pump represents an excellent choice for residences in:
- Montreal
- Laval
- Longueuil
- North Shore
- South Shore
It combines:
- Cold weather performance
- Energy efficiency
- Consistent comfort
Conclusion: A Mastered HVAC Installation from A to Z
This installation in Sainte-Julie clearly demonstrates the importance of a well-executed job. At AirGreen, we don't just install a machine — we deliver a complete, tailored, durable, and high-performance solution.
Every project is unique, and our expertise allows us to anticipate challenges, optimize every detail, and guarantee a result that meets expectations.
The job tools
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.
How the job unfolds
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 we check on a job like this one
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.
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.
Good habits, once the unit is in place
Six simple habits that keep the unit going. Your list stays on this device.
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.
The right pages, at the right time
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).