Installation of a MIDEA EVOX G3 2.5-ton central heat pump in Sainte-Dorothée, Laval
AirGreen installs a MIDEA EVOX G3 2.5 ton central heat pump in Sainte-Dorothée: neat wall-mounted installation, central comfort, HVAC efficiency, and sustainable integration.
- City
- Region
- Equipment
- Brand
- Challenges
- Published
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 Central Heat Pump Precisely Installed in a Restricted Outdoor Space in Sainte-Dorothée
In Sainte-Dorothée, in western Laval, our AirGreen team carried out an HVAC installation that particularly exemplifies the challenges often encountered in mature residential areas: limited outdoor spaces, narrow side access, foundation to respect, presence of a terrace, proximity to a basement window, and the need to integrate a high-performance central heat pump without compromising daily use of the yard.
The project involved installing a MIDEA EVOX G3 2.5-ton central heat pump, a solution designed to provide uniform comfort throughout the house using the existing ductwork. Unlike a wall-mounted heat pump or a wall-mounted air conditioner, which primarily targets a specific area, a central heat pump distributes heated or cooled air to multiple rooms, offering a more balanced sense of comfort.
The image of this installation shows an outdoor MIDEA unit positioned on a wall bracket, fixed to the foundation, in a side passage bordered by a wooden deck and a basement window. This type of location requires rigorous planning. It was necessary to maintain sufficient clearance for air circulation, protect the unit from snow accumulation, respect existing elements around the building, and ensure a clean connection to the interior of the house.
This project in Sainte-Dorothée perfectly illustrates our approach: installing efficient equipment, but above all, doing so sustainably, neatly, and adapted to the actual building. A MIDEA EVOX G3 2.5-ton central heat pump can deliver excellent results, but its performance depends directly on the quality of the installation, outdoor positioning, commissioning, and integration into the indoor system.
A Central Solution for More Stable Comfort Throughout the House
The choice of a 2.5-ton central heat pump met a clear need here: to improve the overall comfort of the residence, both for heating and cooling. In many homes in Laval, particularly in Sainte-Dorothée, Fabreville, Chomedey, Laval-des-Rapides, and Sainte-Rose, homeowners want to modernize their system without multiplying visible wall-mounted units in living areas. When a duct network is already present, a central solution often becomes a very relevant option.
The MIDEA EVOX G3 is appreciated for its modern technology, its ability to modulate its operation, and its possible integration into residential central systems. Thanks to its variable-speed compressor, it can adjust its power according to the actual demand of the house. This modulation helps to reduce sudden cycles, stabilize temperature, and improve perceived comfort.
In a family home, this stability makes a big difference. In summer, the system is not limited to producing cold air: it also helps to better manage indoor humidity, making the air more pleasant. In cold weather, the heat pump can provide efficient heat, depending on the system configuration, house insulation, and outdoor conditions.
For homeowners, the goal was not just to replace or add a machine. They wanted a solution capable of operating discreetly, efficiently, and regularly. The MIDEA EVOX G3 2.5-ton central heat pump met this expectation well, provided it was installed with particular attention to detail.
A Demanding Outdoor Location: Terrace, Foundation, and Basement Window
One of the most important aspects of this installation is the location of the outdoor unit. In the photo, we can see that the unit is installed near a wooden deck, a foundation wall, and a basement window. This type of configuration is common in Laval, especially in residential areas where houses have been developed over the years with patios, fences, landscaped areas, or narrow side accesses.
Our technicians had to contend with several constraints:
- maintaining good clearance in front of the outdoor unit's fan;
- preventing the unit from obstructing access around the house;
- positioning the machine high enough to limit snow-related problems;
- preserving access to the basement window;
- ensuring a clean passage for refrigerant lines and electrical wiring;
- protecting visible connections from the elements;
- maintaining a stable installation despite uneven and rocky ground.
The choice of a wall bracket was therefore particularly logical. Rather than placing the unit directly on the ground, we opted for an installation on metal brackets anchored to the foundation. This method allows the heat pump to be raised, kept away from snow, and frees up the ground around the unit. In an area like Sainte-Dorothée, where snow accumulations can quickly form near walls and terraces, this decision directly contributes to the durability of the installation.
Clean Installation of Lines and Outdoor Protections
A central installation is not judged solely by the outdoor unit. Refrigerant lines, cables, wall protections, connections, and penetrations into the building are equally important. In this project, the conduits and cables were grouped and protected using a vertical line cover, visible to the right of the image. This finish reduces direct exposure to the elements and improves the overall appearance of the installation.
We pay particular attention to the curves of the refrigerant lines. A poorly bent, overly taut, or insufficiently protected line can lead to medium-term problems. Here, the routing was planned to maintain a functional and accessible passage, while respecting the restricted space between the unit, the wall, and the circulation area.
The connection to the inside of the house also had to take into account the configuration of the basement and the existing central system. A central heat pump operates in conjunction with indoor components: coil, furnace or air handler, thermostat, drain, electrical supply, and ductwork. A nice outdoor installation is not enough; the entire system must be coherent.
Why Wall Brackets Are Often Recommended in Laval
In several projects carried out by AirGreen in Montreal, Laval, Longueuil, on the North Shore, and on the South Shore, we often recommend wall brackets when conditions warrant it. It's not just a matter of appearance. It's a technical decision that can improve the protection of the appliance.
A properly installed wall bracket helps to:
- reduce exposure to snow accumulation;
- prevent the unit from being in direct contact with water, mud, or debris;
- facilitate defrost cycles in winter;
- preserve ground space in narrow yards;
- improve access for HVAC maintenance;
- provide a more stable installation when the ground is uneven.
In the case of this residence in Sainte-Dorothée, the ground near the foundation was covered with stones and presented an unsuitable configuration for a traditional ground-level base. By installing the unit on brackets, we achieved better stability and better seasonal protection.
Technical Details That Influence Actual Performance
A MIDEA EVOX G3 2.5-ton central heat pump must be installed according to precise parameters. The 2.5-ton capacity is an important choice because it must match the needs of the house. An undersized unit risks running continuously during periods of high demand. An oversized unit can create cycles that are too short, less stable comfort, and less effective humidity management.
At AirGreen, we evaluate several elements before recommending a capacity:
- approximate area served;
- insulation level;
- age and type of windows;
- sun exposure;
- condition of the ductwork;
- floor configuration;
- existing heating system;
- client's comfort expectations;
- available space for the outdoor unit.
In this installation in Sainte-Dorothée, the 2.5-ton format offered a relevant balance between capacity, efficiency, and comfort. The MIDEA EVOX G3 allows for finer modulation than a conventional system, which helps to adapt the power according to real conditions rather than always operating at full capacity.
Commissioning: A Crucial Step After Installation
Once the outdoor unit is fixed, lines connected, and indoor components integrated, commissioning becomes a determining step. It is at this point that we validate the complete functioning of the system. Our technicians specifically check communication between components, operating temperatures, thermostat settings, system behavior in heating and cooling, and the overall stability of the installation.
This step is particularly important for a central HVAC installation. The final comfort depends on the entire system, not just the outdoor unit. If the airflow is inadequate, if the ductwork is poorly balanced, or if the thermostat is incorrectly configured, the performance experienced by the client may be below the machine's true potential.
In this project, our goal was to deliver an installation ready to operate reliably, with clear explanations for the occupants. We always take the time to present best practices: keeping the outdoor unit clear, monitoring snow accumulation, replacing filters at the right time, and planning periodic HVAC maintenance.
An Installation Representative of AirGreen's Expertise in Laval and Greater Montreal
This installation in Sainte-Dorothée is representative of many projects we carry out in Greater Montreal. Homeowners want more efficient, quieter systems, better adapted to the Quebec climate, and installed with a professional finish. Our role is to transform this expectation into a concrete result.
In Laval, houses can vary greatly from one neighborhood to another. Some have large open lots, while others offer very little space for the outdoor unit. Some have an existing central system that is easy to access; others require more complex adjustments. This diversity demands a team capable of quickly analyzing constraints and proposing a solution that respects performance, safety, and appearance.
In the case of this MIDEA EVOX G3 central heat pump, the final result shows a compact, well-aligned installation, adapted to a narrow environment. The unit is accessible, raised, properly connected, and positioned to preserve essential functions around the house.
Mistakes to Avoid in a Similar Project
When a homeowner considers installing a central heat pump, certain mistakes can prove costly in the long run.
Choosing the Easiest Location Rather Than the Best
The best location is not always the one that requires the least work. A poorly placed unit can be difficult to maintain, too exposed to snow, too close to an opening, or poorly ventilated. In Sainte-Dorothée, the positioning was chosen to respect the real constraints of the building.
Neglecting the Height of the Outdoor Unit
An outdoor unit installed too low can become partially blocked by snow. This hinders air circulation and can affect defrost cycles. The wall bracket used in this project reduces this risk.
Forgetting the Aesthetics of the Installation
A visible installation in a side yard must remain neat. Line covers, conduit alignment, and overall finishing contribute to the building's appearance. This detail matters greatly to homeowners who want a professional result.
Focusing Only on the Brand
The brand and model are important, but the installation is just as crucial. A well-installed MIDEA EVOX G3 will yield better results than a high-end unit that is poorly integrated. The choice of contractor is therefore an essential part of the decision.
Postponing Maintenance
Even a modern machine needs maintenance. Filters, the outdoor coil, drains, and operating parameters must be checked. Good HVAC maintenance helps maintain efficiency and prevent avoidable problems.
Subsidies and Eligibility: An Aspect to Carefully Validate
Central heat pumps may sometimes be eligible for financial aid programs, depending on the exact model, current criteria, and program requirements. For homeowners in Montreal, Laval, Longueuil, on the North Shore, and on the South Shore, these subsidies can make a project more financially attractive, but they must always be verified precisely.
At AirGreen, we recommend keeping all documents related to the installation:
- detailed final invoice;
- model numbers of components;
- proof of installation;
- required technical information;
- documents related to available programs;
- photos or useful references for the file.
Eligibility depends on specific criteria. That's why we support our clients in understanding the requirements, without promising a subsidy without validation of the applicable model and program.
Comfort After Installation: A Daily Difference
After installation, a well-configured central heat pump transforms how a house reacts to temperature changes. Rooms served by ducts receive more uniform air. In summer, air conditioning becomes more consistent than with spot solutions. In winter, the heat pump's contribution provides more regular heat, according to the building's needs.
For this residence in Sainte-Dorothée, the goal was to create a system capable of meeting Quebec's seasonal demands without cluttering the interior with multiple wall-mounted units. The central solution preserves interior aesthetics while improving overall comfort.
Why choose AirGreen for a central heat pump in Sainte-Dorothée
AirGreen regularly operates in Sainte-Dorothée, throughout Laval, in Montreal, Longueuil, on the North Shore, and on the South Shore for heat pump projects, wall-mounted air conditioners, multi-zone systems, and central solutions. Our field experience allows us to identify the details that will make a difference after several winters, not just on the day of installation.
We place great importance on:
- honest assessment of needs;
- selection of appropriate equipment;
- compliant and durable installation;
- exterior finishing;
- line protection;
- complete commissioning;
- usage advice;
- after-installation support.
This approach is essential for central heat pump projects, as the system affects the entire comfort of the home. A successful installation must be robust, efficient, clean, and easy to maintain.
A lasting achievement for a Sainte-Dorothée home
This installation of a MIDEA EVOX G3 2.5 ton central heat pump in Sainte-Dorothée demonstrates the importance of precise planning. The site presented several constraints: nearby terrace, foundation, basement window, limited side space, and the need to protect lines. Thanks to a robust wall bracket, thoughtful layout, and professional finishing, the outdoor unit was integrated efficiently and durably.
For homeowners considering a similar solution in Laval, Montreal, Longueuil, on the North Shore, or on the South Shore, this project shows that quality HVAC installation relies on much more than just choosing the machine. It depends on the building analysis, technical execution, attention to detail, and the contractor's ability to anticipate the real conditions of Quebec's climate.
With this MIDEA EVOX G3 2.5 ton, the residence now benefits from a modern, well-positioned central solution designed to offer reliable comfort throughout the seasons.
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.
More jobs to see, near you
By town, by equipment or by region: browse more than 4,700 published projects.
Each dot: a town where AirGreen has published projects. The glowing dot: this job.
An on-site estimate, the right capacity, the right equipment.
The on-site estimate is free and the quote follows within 24 hours.
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).