Installation of a 2.5-ton MIDEA EVOX G3 central heat pump in Laval
AirGreen installs a 2.5-ton MIDEA EVOX G3 central heat pump in Laval: elevated outdoor unit, meticulous HVAC integration, and central comfort adapted to Quebec winters.
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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 for a Well-Served Laval Home
This installation of a MIDEA EVOX G3 2.5-ton central heat pump in Laval perfectly exemplifies the kind of project where execution quality is as crucial as equipment selection. In a home equipped with a duct network, the central heat pump becomes the heart of indoor comfort: it must efficiently cool in summer, contribute to heating during a large part of the cold season, maintain good air circulation, and integrate seamlessly with the building envelope.
In the photo of this project, several elements immediately catch the eye. The outdoor unit is installed on a solid metal structure, elevated from the ground, alongside a wall covered with horizontal siding. Also visible are a nearby ventilation outlet, an outdoor electrical panel, a limited grassy area, and the presence of the AirGreen vehicle in the background. These details illustrate the common constraints of a residential HVAC installation in Laval: one must contend with available space, necessary clearances, existing building components, and Quebec's climatic realities.
At AirGreen, we approach each installation as a complete system, not merely as the placement of a machine. A central heat pump of 2.5 tons must be properly sized, positioned, connected, and configured. Without this rigor, even high-performing equipment can yield disappointing results. In this project, the MIDEA EVOX G3 was selected to offer an excellent balance between comfort, energy efficiency, central integration, and capacity tailored to the home's needs.
Why a 2.5-ton capacity was suitable for this project in Laval
A 2.5-ton central heat pump, equivalent to approximately 30,000 BTUs, is generally suitable for homes where the thermal load requires a unit capable of handling a significant air volume without being oversized. However, the right choice is never based on a quick estimate. Before recommending this type of system, we consider several factors: living area, insulation, house orientation, number of floors, duct network configuration, existing system power, return air quality, and occupant expectations.
In Laval, homes vary greatly from one neighborhood to another. Some properties have older ducts, sometimes originally designed for a furnace only. Others have been renovated and require more thorough validation of airflow. In this installation, the 2.5-ton capacity met the cooling and heating needs without falling into the classic error of oversizing.
A system that is too small can run too long, struggle to reach the desired temperature, and increase discomfort on very hot days. Conversely, a system that is too large can create short cycles, reduce dehumidification, increase component wear, and cause temperature variations. For a central heat pump, sizing therefore remains one of the best indicators of the quality of the work performed upstream.
An elevated outdoor installation to better withstand Quebec conditions
One of the most important aspects visible in the image is the height of the outdoor unit. The MIDEA EVOX G3 was installed on a robust metal support, anchored to keep the unit well above ground level. This choice is not merely aesthetic. In Laval, as in Montreal, on the North Shore, South Shore, and in Longueuil, snow accumulation, thaws, ice, and ground water can impair heat pump operation if the unit is placed too low.
A well-elevated outdoor unit allows for:
- limiting the risk of snow obstruction;
- reducing direct exposure to standing water;
- facilitating clearance around the unit;
- improving access for HVAC maintenance;
- protecting exterior components from certain ground debris.
In this case, the installation on a wall bracket or independent metal structure also allowed the unit to be positioned in a narrow area without sacrificing stability. The visible structure beneath the unit provides a clean and clear base, particularly useful in side yards where space is often limited. This type of configuration requires particular attention to alignment, level, vibrations, and the solidity of the fastening points.
Clearance around the unit: a detail that directly influences performance
The photo shows a unit installed near the house wall, with the fan oriented towards the open space. This positioning aims to allow good air circulation, an essential condition for the proper functioning of a heat pump. An outdoor unit should never be suffocated by a wall, fence, shed, dense hedge, or too close an obstacle.
For a MIDEA EVOX G3 central heat pump, air must enter and exit freely so that heat exchange occurs correctly. If the unit lacks air, it can lose efficiency, become noisier, work harder, and operate under less favorable conditions. In residential neighborhoods of Laval, this issue often arises because side spaces are sometimes narrow and already occupied by dryer vents, meters, electrical panels, stairs, or landscaping.
In this installation, we considered the existing environment. The visible wall outlet near the unit, the electrical panel, and the nearby grassy area required careful planning. The goal was to respect functional clearances while keeping the equipment accessible. This approach avoids several long-term problems, especially during seasonal maintenance or a potential technical intervention.
Clean integration into the existing building
Each building has its constraints. Here, the exterior wall features horizontal siding, an exposed foundation, and already installed elements. A poorly planned intervention could have resulted in a cluttered or difficult-to-maintain outcome. Therefore, we opted for a sober, solid, and orderly installation.
The central heat pump must not only function correctly; it must also integrate durably into the home. Owners often notice the sound level, the visual location of the unit, and the space the appliance occupies in the yard. In this project in Laval, the unit was positioned to limit ground clutter while maintaining sufficient access to components.
This concern for finish is part of our way of working. Connections must be well protected, wall penetrations must be clean, supports must be adapted to the weight of the equipment, and electrical elements must be installed in accordance with best practices. A well-executed HVAC installation is visible in the details.
Technical steps that ensured reliable commissioning
Ductwork and air distribution verification
A central heat pump directly depends on the ductwork. Unlike a wall-mounted air conditioner or heat pump that distributes air from a visible indoor unit, a central system uses existing ducts to distribute air throughout the house. This offers more uniform comfort, but only if the ducts are compatible with the required airflow.
Before and during installation, we ensure that the system can distribute air correctly. Poor circulation can lead to rooms being too hot or too cold, high static pressure, excessive noise, or loss of efficiency. In some cases, it is necessary to adjust registers, check the filter, inspect the return air, or recommend improvements to the existing network.
For this house in Laval, the goal was to achieve stable and consistent air diffusion in the served rooms. The 2.5-ton MIDEA EVOX G3 had to work with the central system without causing imbalance. This step is particularly important for homeowners replacing an old central air conditioner or adding a heat pump to an existing system.
Refrigeration, electrical connections, and system control
The installation of a central heat pump requires precise technical work. Refrigerant connections must be made carefully, lines must be protected, electrical connections must meet appliance requirements, and the thermostat must be adequately configured. Cooling and heating operation must then be validated.
During commissioning, our team checks several elements:
- outdoor unit stability;
- electrical supply;
- communication with the indoor system;
- fan operation;
- thermostat response;
- cooling mode;
- heating mode;
- drainage and condensation;
- noise and vibrations;
- overall system behavior after startup.
These checks allow for the delivery of a reliable installation from day one. They also enable us to clearly explain to the owner how to use their new system, which settings to prioritize, and which signs to monitor.
The MIDEA EVOX G3: a central solution adapted to daily comfort
The MIDEA EVOX G3 range is appreciated for its modern approach to central heating and air conditioning. For homeowners in Laval, it represents an interesting option when they want to improve their comfort without multiplying indoor units. Its 2.5-ton capacity is suitable for several residential configurations, subject to a professional building analysis.
A well-chosen central heat pump can help reduce heating consumption during several periods of the year, while offering efficient air conditioning in summer. The hot and humid days of July and August in the greater Montreal area often put systems to the test. A properly installed central unit helps maintain a more stable temperature and better humidity management.
The appeal of a central system is not limited to its power. Perceived comfort also depends on consistent airflow, thermostat quality, duct configuration, and commissioning. This is why our work remains essential even when the selected equipment is of good quality.
Subsidies and eligibility: an essential verification
Homeowners installing a central heat pump often want to know if their project is eligible for subsidies, especially under energy efficiency programs. For a MIDEA EVOX G3, eligibility depends on the exact combination installed, model numbers, current criteria, and documents provided after the work.
At AirGreen, we guide our clients to keep important information: detailed invoice, installed models, proof of installation, and useful documentation. Programs can vary depending on the timing and technical requirements. Good administrative preparation helps avoid common errors, such as submitting an incomplete combination or neglecting certain documents.
We always emphasize that the installation must be carried out correctly and documented accurately. A heat pump eligible on paper must also correspond to the equipment actually installed.
Mistakes to avoid with a central heat pump in Laval
Many homeowners compare central systems solely by price or tonnage. This approach can lead to poor decisions. A sustainable HVAC installation relies on the entire project, not just the brand name.
The most common mistakes are:
- choosing a capacity without assessing the house;
- ignoring the condition of the ductwork;
- installing the outdoor unit too close to the ground;
- placing the unit in a poorly ventilated area;
- neglecting access for HVAC maintenance;
- comparing quotes without checking inclusions;
- forgetting the importance of the thermostat and system configuration.
In Laval, these errors can have concrete consequences. An outdoor unit that is too low can become partially blocked by snow. A poorly ventilated unit can lose efficiency. An improperly sized system can make certain rooms uncomfortable. This is why we emphasize a comprehensive approach, from initial selection to commissioning.
Practical tips after installation
To maintain the performance of this MIDEA EVOX G3 2.5-ton central heat pump, a few simple habits are recommended. The owner must ensure that the space around the outdoor unit remains clear, especially in winter. Leaves, snow, branches, and objects stored too close can obstruct airflow.
Indoors, the filter should be replaced or cleaned according to system recommendations. A clogged filter reduces airflow and can affect overall performance. Supply and return grilles must remain unobstructed. It is also important to avoid closing too many registers at once, as this can upset the balance of the central system.
Regular professional maintenance allows for checking the general condition of the installation, electrical components, heating and cooling operation, and the cleanliness of accessible elements. In the greater Montreal region, where HVAC systems are heavily used during the summer and a significant part of the winter, this maintenance helps extend the equipment's lifespan.
What this project demonstrates about the AirGreen approach
This installation in Laval demonstrates the importance of a rigorous method. The MIDEA EVOX G3 was installed in a real outdoor space, with concrete constraints: siding wall, ventilation outlet, electrical panel, grassy area, required clearances, and the need to elevate the unit. These are precisely the details that distinguish an ordinary installation from one designed to last.
At AirGreen, we install central heat pumps, wall-mounted heat pumps, wall-mounted air conditioners, and complete HVAC systems in Montreal, Laval, Longueuil, on the North Shore, and on the South Shore. Our field experience allows us to adapt each project to the building, budget, comfort objectives, and technical requirements.
For this Laval client, the result is a clean, stable, accessible installation adapted to local conditions. The outdoor unit is clear, well-positioned, and elevated to better cope with the realities of Quebec's climate. The central system now offers a solid foundation for more uniform comfort in the house, summer and winter alike.
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).