Installation of a MIDEA EVOX G3 2.5-ton central heat pump in Ahuntsic-Cartierville, Montreal: a clean, compact, and perfectly suited HVAC integration for an urban home
AirGreen installs a MIDEA EVOX G3 2.5 ton central heat pump in Ahuntsic-Cartierville: compact installation, solid supports, central comfort, and HVAC expertise in Montreal.
- City
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- Equipment
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- Challenges
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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 central heat pump precisely installed in a typical Montreal environment
In Ahuntsic-Cartierville, HVAC installations often require more than just technical expertise. Homes in this area of Montreal frequently feature restricted exterior access, brick walls, narrow side yards, stairs, balconies, fences, shared passages, and space constraints that require the installation team to meticulously plan every detail. For this project, AirGreen carried out the installation of a 2.5-ton MIDEA EVOX G3 central heat pump, a solution designed to provide uniform comfort throughout the home for both heating and cooling.
The photo of this installation perfectly illustrates the nature of the challenge: the MIDEA outdoor unit was installed near a brick wall, in a narrow space bordered by a green metal structure and a vertical downspout. The unit rests on sturdy, well-aligned supports, keeping it at an adequate height above the ground. This configuration is particularly important in a borough like Ahuntsic-Cartierville, where snow, ice, freeze-thaw cycles, and accumulations near foundations can impair the proper functioning of a poorly positioned unit.
For this client, the objective was clear: to replace or modernize the home's comfort with a central heat pump capable of distributing air through the existing ductwork, while maintaining a compact, clean, and accessible outdoor installation for HVAC maintenance. The choice of the 2.5-ton MIDEA EVOX G3 perfectly met this requirement.
Why the 2.5-ton MIDEA EVOX G3 was an excellent choice for this Ahuntsic-Cartierville home
A 2.5-ton central heat pump corresponds to a capacity often highly relevant for medium-sized Montreal homes, especially when the ductwork is already in place and the goal is to achieve a stable temperature in multiple rooms. Unlike a wall-mounted heat pump or a wall-mounted air conditioner, the central solution allows heated or cooled air to be distributed through existing grilles, without adding visible wall units to living spaces.
For this project in Ahuntsic-Cartierville, the client sought a discreet, efficient, and durable solution. The MIDEA EVOX G3 is a range appreciated for its modern design, its ability to operate in the demanding conditions of Quebec's climate, and its possible integration with residential central systems. The 2.5-ton capacity was chosen to strike a balance between performance, comfort, efficiency, and stable operation.
At AirGreen, we never recommend a capacity based solely on a general impression. A good equipment selection is based on several concrete elements:
- the size of the house;
- the insulation level;
- sun exposure;
- the condition of the ductwork;
- the volume of air to be distributed;
- the configuration of the floors;
- actual heating and cooling needs;
- available electrical capacity;
- occupant comfort habits;
- outdoor installation constraints.
This analysis work is essential. A heat pump that is too small may run too long without achieving the desired comfort. A heat pump that is too large can cause short cycles, impair dehumidification in summer, and lead to premature wear of certain components. In this installation, the 2.5-ton MIDEA EVOX G3 offered sizing consistent with the property's needs.
A neat outdoor installation against a brick wall
The outdoor unit is installed directly in front of a red brick wall, a very common situation in Montreal's residential neighborhoods. This type of wall offers several advantages, notably a durable and stable structure near the unit, but it also demands great rigor in positioning lines, conduits, and clearances.
In the photo, the unit is positioned to maintain a clear front for exhaust and air circulation. The large front fan must be able to operate without obstruction. Inadequate clearance could reduce efficiency, increase noise levels, complicate winter defrosting, or cause excessive pressure on the system.
The immediate environment is also important: to the left, a metal structure limits available space; to the right, connections must remain protected and accessible; behind, the brick wall and existing openings require a clean installation, without improvisation. Our team therefore worked with precision to ensure a solid, straight, and durable setup.
Well-chosen metal supports for Montreal's climate
One of the most important details of this installation is the unit's height. The heat pump is installed on robust metal supports, allowing it to be raised off the ground. In Ahuntsic-Cartierville, as in several areas of Laval, Longueuil, the North Shore, and the South Shore, this precaution is essential.
In winter, an outdoor unit installed too low can be exposed to several problems:
- snow accumulation around the base;
- partial obstruction of the exchanger;
- excessive ice formation;
- difficulty in draining defrost water;
- premature corrosion of certain components;
- more difficult access for maintenance or service.
The raised support improves the durability of the installation and facilitates the heat pump's operation during cold periods. It also helps keep the unit cleaner and better ventilated throughout the seasons.
The challenge of a narrow urban space
Installations in Ahuntsic-Cartierville often demand excellent adaptability. Urban properties do not always allow for choosing the ideal location on paper. It is sometimes necessary to contend with plot limitations, pedestrian walkways, fences, stairs, service accesses, basement windows, and required distances.
In this project, the space to the left of the unit was limited by a metal structure. The unit therefore had to be positioned so as not to obstruct access, while maintaining the necessary clearances for ventilation and maintenance. This type of constraint may seem minor, but it directly influences the final quality of an HVAC installation.
A poorly planned installation could have complicated future interventions, created vibrations against a neighboring structure, or reduced airflow. Our team chose an arrangement that allows the unit to function correctly while respecting the building's constraints.
A central heat pump for uniform comfort throughout the house
The great advantage of a central heat pump is its ability to supply multiple rooms from a single system. Air is distributed through ducts, providing more homogeneous comfort than with a single wall-mounted unit installed in a main area.
For occupants, this difference is felt daily. In summer, central air conditioning helps reduce heat in bedrooms, hallways, the living room, and common areas. It also helps control humidity, a very important factor in Montreal homes, where hot and humid periods can make indoor air heavy and uncomfortable.
In winter, the central heat pump provides more evenly distributed heat. When properly sized and installed, it can reduce the use of an auxiliary system for a significant part of the cold season. The desired result is not just a temperature displayed on the thermostat, but real comfort in different areas of the house.
Discrete integration to preserve the interior
Many clients choose a central heat pump because they wish to avoid installing wall units in rooms. A wall-mounted heat pump or a wall-mounted air conditioner can be an excellent solution in many contexts, but in a home equipped with ducts, the central system offers more discreet integration.
In this project in Ahuntsic-Cartierville, the central solution preserved the interior aesthetics. The client benefits from a high-performance heating and cooling system without altering the appearance of interior walls. This approach is particularly appreciated in renovated homes, properties with meticulous finishes, or spaces where every wall is already occupied by furniture, windows, or architectural elements.
The importance of connections and line protection
Although the photo primarily shows the front of the outdoor unit, the connection area is visible on the right side. This part of the installation is fundamental. Refrigerant lines, communication wiring, electrical power, and drainage must be protected and installed according to best practices.
Poor protection of the lines can lead to efficiency losses, condensation, insulation deterioration, vibrations, or long-term service problems. In an outdoor installation exposed to Montreal's weather, the quality of connections becomes even more important.
At AirGreen, we pay particular attention to these elements:
Adequate insulation of refrigerant lines
The insulation must be properly installed, continuous, and protected against physical damage. Negligent insulation can reduce system performance.
Seal integrity of connections
Connections must be carefully made to prevent any refrigerant leaks. This requires appropriate tools, a rigorous method, and thorough verification.
Clean and safe routing
Lines must follow a logical path, without unnecessary tension, excessive bending, or exposure to avoidable risks.
Accessibility for service
A heat pump must remain accessible for HVAC maintenance, inspections, and potential diagnostics. An overly cramped or poorly oriented installation can complicate future interventions.
Commissioning: the step that confirms installation quality
Once the unit is installed, the work does not stop at fixing the appliance. Commissioning is an essential step to confirm that the MIDEA EVOX G3 central heat pump is working correctly with the rest of the system.
During this step, our team specifically checks:
- heating operation;
- cooling operation;
- operating pressures and parameters;
- communication between components;
- thermostat behavior;
- airflow;
- absence of abnormal vibrations;
- drainage;
- clearances around the unit;
- system response after startup.
This final verification protects the client against problems that could have been avoided from the outset. It also allows for adjusting certain parameters to improve system comfort and stability.
Subsidies and energy efficiency: what homeowners need to know
Owners who install a high-performance central heat pump may sometimes be eligible for subsidy programs, depending on the exact model, current criteria, and applicable program requirements. In the greater Montreal area, several clients ask us if their project can be eligible for financial aid, particularly under energy efficiency programs.
For a MIDEA EVOX G3, eligibility must be validated with the exact model numbers, official manufacturer data, and program criteria at the time of application. At AirGreen, we help our clients gather the necessary information, including the invoice, equipment details, and useful documents to submit their application when the unit is eligible.
It is important to choose a heat pump for the right reasons: comfort, performance, durability, installation quality, and compatibility with the home. The subsidy can reduce the net cost of the project, but it never replaces a serious technical evaluation.
Mistakes to avoid when installing a central heat pump in Montreal
A central heat pump project may seem simple once the unit is chosen, but several errors can compromise the final result.
Installing the unit too close to an obstacle
Air circulation is essential. A unit that is too cramped can lose efficiency and make more noise.
Neglecting installation height
In Montreal, snow and ice must always be taken into account. A unit that is too low can become problematic after a few storms.
Choosing capacity without analysis
The 2.5-ton capacity is suitable for some buildings, but not all. Sizing must be confirmed according to actual needs.
Forgetting the ductwork
A central heat pump depends on the quality of the ducts. Imbalanced or leaky ducts can reduce comfort.
Focusing solely on price
A lower quote can hide shortcuts: lower quality supports, quick commissioning, insufficient protections, or lack of post-installation support.
HVAC maintenance: preserving the performance of the MIDEA EVOX G3
After installation, good maintenance helps maintain system performance. A central heat pump operates for long periods, both for heating and cooling. It must therefore be inspected regularly.
Owners should pay attention to several elements:
- clean or replace filters as recommended;
- keep the outdoor unit clear;
- remove leaves, branches, and debris around the unit;
- ensure snow does not block airflow;
- monitor for unusual noises;
- schedule periodic professional maintenance;
- avoid constantly changing settings.
Regular HVAC maintenance helps extend the heat pump's lifespan, reduce the risk of breakdowns, and maintain more stable energy consumption.
A Representative Achievement of AirGreen's Expertise
This installation in Ahuntsic-Cartierville truly represents our approach at AirGreen: analyzing the site, choosing a suitable solution, installing cleanly, and thinking long-term. The MIDEA EVOX G3 2.5-ton unit was installed in a compact space, against a brick wall, with solid positioning and particular attention to clearances.
We regularly undertake similar projects in Montreal, Laval, Longueuil, on the North Shore, and on the South Shore. Each area presents its own constraints. In Montreal, space is often limited. In Laval, single-family homes sometimes offer more clearance, but foundations, terraces, and exterior landscaping must be respected. On the South Shore and North Shore, projects may involve longer line distances, installations on wall brackets, or more complex mechanical access.
Our job is to adapt the solution to each building. A good HVAC installation must be efficient, but also clean, safe, accessible, and durable.
A Reliable Result for Daily Comfort
For the client in Ahuntsic-Cartierville, this 2.5-ton MIDEA EVOX G3 central heat pump provides a complete solution for heating and air conditioning. The outdoor installation is compact, well-integrated, and ready to face Montreal's climatic conditions. The central system allows for balanced air distribution throughout the house while maintaining a discreet interior appearance.
This type of project demonstrates the importance of entrusting the installation to a team that understands both the equipment, Montreal buildings, and the requirements of Quebec's climate. A well-chosen heat pump can improve comfort. A well-installed heat pump can do so for many years.
At AirGreen, we put this rigor at the heart of every project, whether it's a central heat pump, a wall-mounted heat pump, a wall-mounted air conditioner, or a complete HVAC system. For homeowners in Ahuntsic-Cartierville, Montreal, Laval, Longueuil, the North Shore, and the South Shore, our goal remains the same: to provide a reliable, adapted, and well-thought-out installation for the real comfort of occupants.
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).