Installation of a MIDEA EVOX G3 2.5 ton central heat pump in Montreal
AirGreen installs a MIDEA EVOX G3 2.5 ton central heat pump in Montreal: solid wall mounting, central comfort, meticulous finish, and local HVAC expertise.
- 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 typical Montreal urban space
In several residential sectors of Montreal, installing a central heat pump demands more than simple mechanical connection. Homes are often close together, outdoor access can be narrow, brick walls require particular attention to drilling and fastening, and the location of the outdoor unit must respect performance, safety, aesthetics, and future maintenance. This is exactly the type of context we encountered during this installation of a MIDEA EVOX G3 2.5 ton central heat pump carried out by AirGreen in Montreal.
The project photo immediately shows a compact and well-structured installation: the MIDEA outdoor unit is mounted on a metal wall bracket, against a brick wall, near a green painted outdoor staircase. This type of environment is very common in Montreal, particularly in neighborhoods where buildings were constructed with restricted side yards and shared access. Our team's objective was clear: install a high-performance, solid, and durable central heating and air conditioning solution, while respecting the physical constraints of the building.
Why a MIDEA EVOX G3 2.5 Ton Was a Relevant Choice
The MIDEA EVOX G3 is a central heat pump designed to meet the needs of homeowners who want to improve their overall comfort without adding visible wall units in rooms. Unlike a wall-mounted heat pump or a wall-mounted air conditioner, a central solution uses a duct network to distribute treated air throughout the house. For a Montreal building already equipped with centralized air distribution, this option becomes particularly attractive.
In this project, the 2.5 ton capacity offered a good balance between air processing power, efficiency, and comfort. A unit that was too small might have run excessively on very hot or very cold days. A unit that was too large might have caused short cycling, poorer dehumidification, and premature wear. At AirGreen, we place great importance on sizing, as the actual performance of an HVAC installation depends as much on the choice of equipment as on the quality of its installation.
A 2.5 ton central heat pump is often suitable for medium-sized homes, but each building must be evaluated according to its own characteristics: insulation, orientation, surface area, number of floors, condition of ducts, occupant habits, and outdoor installation constraints. In Montreal, these factors vary greatly from one neighborhood to another, making on-site evaluation essential.
A wall installation that protects equipment and optimizes space
In this project, the outdoor unit was installed on wall supports anchored in the foundation. This choice was particularly well-suited to the environment visible in the photo. The ground near the building offers little maneuvering room, and the presence of the outdoor staircase limits available space. By raising the unit, we lifted it off the ground level, reduced the risks associated with snow accumulation, and facilitated access around the machine.
A ground-level installation may be appropriate in some cases, but in urban Montreal, wall mounting offers several advantages:
- it frees up floor space;
- it limits direct exposure to puddles, leaves, and debris;
- it better protects the unit during winter;
- it facilitates cleaning around the unit;
- it allows for stable installation when the ground is uneven;
- it improves access for future HVAC maintenance.
In this installation, the support was positioned at a height that allows for useful clearance under the unit, while keeping the unit accessible for technical checks. The unit is also well-aligned with the brick wall, providing a clean finish despite the limited space.
The challenges of a brick wall in Montreal
Installing a central heat pump on a brick facade requires a rigorous method. Brick, very common in Montreal buildings, demands adapted fastenings, precise drilling, and particular attention to vibrations. Poor fastening can lead to noise, movement, accelerated wear of anchors, or damage to the building.
Our team therefore worked carefully to ensure a stable installation. The anchor points for the wall mount were chosen to properly distribute the weight of the outdoor unit. The unit's mounting feet were well positioned on the rails, and the unit was leveled to ensure proper operation of the compressor and drainage.
The proximity of the staircase also represented a significant constraint. It was necessary to maintain safe access, avoid obstructing the passage, and retain sufficient space around the fan to ensure good air circulation. The MIDEA unit, with its large front fan, must "breathe" properly to exhaust or capture heat depending on the operating mode. Insufficient clearance can reduce efficiency and force the unit to work harder.
A Clean and Durable Connection
On the right side of the unit, the connections and line routing to the building are visible. For a reliable HVAC installation, this part of the job is essential. Refrigerant lines, communication wires, electrical supply, and drainage must be routed neatly, protected, and positioned to limit mechanical stress.
In this project, our team took care to:
- protect lines against friction;
- maintain a clean path to the entry point;
- avoid unnecessary or overly tight bends;
- preserve access to the service panel;
- ensure a neat finish around the wall;
- keep technical components accessible for maintenance.
A central system like the MIDEA EVOX G3 must be installed with particular attention to the quality of connections. A high-performance heat pump can lose some of its efficiency if lines are poorly prepared, insulation is neglected, or connections are not properly checked. At AirGreen, we treat these details as major elements of project success.
Central comfort adapted to the demands of Montreal homes
A MIDEA EVOX G3 2.5 ton central heat pump offers a significant advantage: it allows for air conditioning and heating of the entire house from a centralized system. For homeowners who want to avoid marked temperature differences between rooms, it is a highly appreciated solution.
More uniform air distribution
In a multi-room house, one of the biggest challenges to comfort is uniformity. Some rooms heat up faster due to sun exposure, others remain cooler because they face a different direction or are located near an exterior wall. With a central heat pump, air is distributed through ducts, which helps stabilize the indoor temperature.
In Montreal, this stability is particularly useful during periods of summer humidity. A good central system not only lowers the temperature: it also helps improve the feeling of comfort by better controlling humidity, when the installation and sizing are adequate.
In winter, the heat pump can contribute to heating efficiently for a large part of the season. The central system allows heat to be distributed in several areas of the house, which improves comfort without multiplying visible appliances.
An installation designed for the Greater Montreal climate
HVAC systems installed in Greater Montreal must be chosen and installed with varied climatic conditions in mind. Summer can be humid and hot; winter can bring frost, snow, wind, and defrost cycles. This is why the outdoor location plays such an important role.
In this installation in Montreal, the choice of a wall mount better protects the unit during the cold season. The clearance under the unit helps limit problems related to snow accumulation around the base. Positioning against the brick wall also offers a compact integration, without completely sacrificing outdoor space.
We apply the same logic during our installations in Laval, Longueuil, on the North Shore and on the South Shore. Each region has its peculiarities, but the same principles remain: proper sizing, adequate clearance, clean connections, solid fastening, and easy access for maintenance.
Mistakes to avoid with a central heat pump
Homeowners shopping for a central heat pump often compare brands, prices, and capacities. These elements are important, but they are not sufficient. Poor installation can reduce the benefits of an excellent appliance. Here are the mistakes we most often see during evaluations or replacements of existing systems:
Installing the unit too close to an obstruction
An outdoor fan needs adequate airflow. Too close to a wall, fence, staircase, or another appliance, the unit can recirculate its own air and lose efficiency.
Neglecting vibrations
Even a modern appliance can transmit vibrations if the support is poorly chosen or poorly fixed. On a brick wall, the quality of the anchors and the addition of adapted supports are essential.
Choosing a capacity without analysis
The choice of a 2-ton, 2.5-ton, or 3-ton capacity must be based on the actual needs of the building. Too quick an estimate can harm comfort and efficiency.
Forgetting future maintenance
An overly tight installation can make inspections difficult. It must be possible to access panels, clean the unit, and check connections without having to disassemble part of the installation.
What this installation reveals about AirGreen's expertise
This installation in Montreal perfectly illustrates our way of working. We don't just aim to place the unit where it physically fits. We seek the location that respects performance, the building, safety, the neighborhood, and customer comfort.
In this project, the presence of the staircase, the brick wall, the limited lateral clearance, and existing connections demanded a precise installation. The wall support had to be solid, the unit had to remain accessible, and the finish had to remain clean despite the proximity of architectural elements. It is this type of detail that distinguishes an ordinary installation from a durable HVAC installation.
At AirGreen, we regularly carry out similar projects in Montreal, in duplexes, triplexes, single-family homes, condominiums, and buildings with restricted access. This experience allows us to anticipate constraints before they become problems on the job site.
Subsidies and eligibility: an important aspect to check
Homeowners installing a central heat pump often want to know if their unit is eligible for a subsidy. Depending on the exact model, certifications, energy performance, and applicable criteria, some installations may be eligible for programs such as those related to energy efficiency in Quebec.
For a MIDEA EVOX G3, it is important to validate the precise model number and applicable requirements at the time of purchase. At AirGreen, we assist our clients in this verification so that they clearly understand the steps, required documents, and possible conditions. A subsidy can make the project more advantageous, but it should never replace a good technical analysis.
A central heat pump must first be chosen because it suits the building. Then, eligibility for financial aid can enhance the project. This approach avoids unpleasant surprises and allows the client to make a more informed decision.
Recommended maintenance after installation
Once the installation is complete, long-term performance also depends on maintenance. A well-maintained central heat pump operates more efficiently, maintains better airflow, and reduces the risk of premature breakdown.
We particularly recommend:
- replacing or cleaning filters according to system recommendations;
- keeping the outdoor unit clear of leaves, snow, dust, and debris;
- having electrical components checked;
- monitoring unusual noises;
- scheduling periodic HVAC maintenance;
- checking that indoor grilles and registers are not obstructed;
- having the system inspected before periods of high demand.
In this Montreal installation, access to the outdoor unit has been maintained to facilitate these operations. This is an important choice, as a difficult-to-maintain heat pump is often a poorly maintained heat pump.
A discreet, robust, and Montreal-adapted central solution
The final result is a solid, compact installation well-integrated into the building's environment. The MIDEA EVOX G3 2.5 ton central heat pump is installed on a robust wall mount, with particular attention to clearance, fastening, and the cleanliness of connections. The outdoor unit fits into a tight space without obstructing existing access, which is a real advantage in an urban context.
For the client, this installation means improved indoor comfort, a discreet central solution, and a significant upgrade to their heating and cooling system. For our team, it represents a concrete example of what we do every week in Montreal, Laval, Longueuil, on the North Shore and the South Shore: adapting the HVAC solution to the building, rather than forcing the building to adapt to the machine.
Why choose AirGreen for a central heat pump in Montreal
A central heat pump is a significant investment. While the brand and model are important, the quality of installation is crucial. At AirGreen, we combine technical assessment, field experience, and a meticulous approach to deliver durable, efficient installations tailored to local realities.
Our teams are familiar with the specific challenges of Montreal buildings: brick, outdoor staircases, narrow yards, shared access, old foundations, clearance requirements, and aesthetic constraints. This practical knowledge allows us to propose reliable solutions without improvisation.
For a heat pump, wall-mounted air conditioner, central system installation, or a complete HVAC project, we offer clear, professional, and results-oriented support. This installation of a MIDEA EVOX G3 2.5 tons in Montreal is a good example: a well-chosen appliance, solid installation, clean finish, and a solution designed to last.
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).