Installation of a MIDEA EVOX G3 1.5-ton electric furnace in Ville-Marie: central system with compact air handler in a confined space
AirGreen installs a MIDEA EVOX G3 1.5-ton electric furnace in Ville-Marie: compact central system, air handler, confined space, and HVAC expertise in Montreal.
- City
- Region
- Equipment
- Brand
- Challenges
- Published
The job on one screen

The article, chapter by chapter
Meticulous HVAC Installation in the Heart of Ville-Marie, Where Every Inch Counts
In a dense area like Ville-Marie, HVAC projects rarely call for a standard approach. Access is often tighter, buildings present particular architectural constraints, and mechanical spaces leave no room for improvisation. For this installation, our AirGreen team installed a MIDEA EVOX G3 1.5 ton electric furnace, configured as a central system with an air handler, in a particularly narrow interior space.
The construction site photo clearly illustrates the level of precision required: the central unit was installed vertically, in a cramped technical corridor, with a ceiling opening allowing connection to the existing network. This type of installation demands excellent coordination between mechanics, structure, service access, and interior finishing.
Why choose a MIDEA EVOX G3 1.5 ton for a central system in Ville-Marie
The MIDEA EVOX G3 is a highly relevant solution for urban dwellings, condos, renovated plexes, and properties where central air distribution is desired while improving comfort and energy efficiency. In this project in Ville-Marie, the choice of a 1.5 ton capacity met a specific need: to offer performance suited to the dwelling's area without oversizing the equipment.
A system that is too large can cause short cycling, poor dehumidification, and premature wear. Conversely, a system that is too small can run non-stop on hot or cold days. Our role, therefore, is to validate the actual building configuration, the condition of the ducts, installation constraints, and client expectations before recommending equipment.
The concrete advantages of this electric furnace with air handler
This installation allows the client to benefit from several important advantages:
- More uniform air distribution in rooms served by the central network.
- A compact solution adapted to small mechanical spaces.
- Better integration with a compatible central heat pump.
- More modern operation than a conventional old electric furnace.
- A configuration designed to facilitate future access for HVAC maintenance.
In an area like Montreal, where several buildings have been modified over the years, equipment adaptability becomes an essential criterion. Here, the MIDEA EVOX G3 offered the right balance between size, performance, and installation flexibility.
A challenging site with difficult access and ceiling adjustment
One of the most visible elements in the photo is the ceiling opening around the unit. This type of work is not uncommon when replacing or installing a central system in an existing building. Ducts, return air, and technical clearances are not always aligned with the dimensions of the new appliance.
Our team therefore had to work with precision to:
- Position the air handler at the correct height.
- Maintain necessary clearances.
- Preserve access to service panels.
- Prepare connections to the distribution network.
- Minimize impact on interior surfaces.
The unit was temporarily placed on a sturdy work base to allow for adjustments before final fastening and definitive connections. This detail is important: a central installation is not limited to "just placing a machine." Each step influences air circulation, noise, performance, and system durability.
The importance of proper alignment in a central installation
In a central HVAC installation, alignment between the unit and the ducts is critical. Poor connection can create pressure losses, vibrations, air noise, or decreased efficiency. In this project in Ville-Marie, we paid particular attention to the upper junction, visible near the ceiling opening.
Even when the new appliance is efficient, it must be installed in a coherent environment. This is often where AirGreen's experience makes the difference: we don't just install the equipment, we also analyze the reality of the building.
What owners should avoid when replacing an electric furnace
Many clients in Montreal, Laval, Longueuil, on the North Shore and the South Shore contact us after receiving quotes that are difficult to compare. For an air handler or an electric furnace, some common mistakes must be avoided:
- Choosing solely based on price without checking installation quality.
- Installing an oversized capacity "for safety."
- Neglecting the condition of existing ducts.
- Forgetting future access for maintenance and repairs.
- Underestimating adjustment work around the ceiling, walls, or air return.
- Not checking compatibility with a central heat pump.
In this project, the main constraint was not just the equipment, but the available space. Poor planning could have complicated connections or made future maintenance much more difficult.
A clean intervention despite a sensitive interior environment
Working in an already finished dwelling requires a different method than a new construction site. Walls, ceilings, moldings, doors, and existing surfaces must be protected. The photo shows an interior environment where the equipment is installed in a narrow passage, near a finished wall and a high-traffic area.
Our team therefore adopted a careful approach: controlled handling, checking access angles, progressive positioning, adjustments before final connection. This rigor helps limit damage and ensures a professional result, even when the workspace is constrained.
Performance, comfort, and efficiency: a system designed for the Montreal reality
A MIDEA EVOX G3 1.5 ton electric furnace integrates perfectly into a central comfort strategy when the building already has a functional duct network. For owners in Ville-Marie, the goal is often to modernize the system without completely transforming the interior layout.
A central system allows for maintaining a more stable temperature in the serviced rooms. When well designed, it also contributes to better air circulation. During both heating and cooling periods, comfort depends as much on the choice of equipment as on the quality of the air network.
Subsidies and eligibility: a point to validate based on the complete configuration
Depending on the final project configuration, some central heat pump systems may be eligible for subsidy programs like Hydro-Québec's LogisVert. Eligibility generally depends on the complete model installed, certified performance, indoor/outdoor combination, and applicable requirements at the time of installation.
At AirGreen, we help our clients understand these conditions before making a decision. For projects in Montreal, Laval, Longueuil, on the North Shore or the South Shore, this step can strongly influence the final choice between different brands and capacities.
Our AirGreen method for this type of project
For a central installation like this, our method is based on several verifications:
- Analysis of available mechanical space.
- Validation of required capacity.
- Verification of the existing duct network.
- Preparation of work access.
- Secure installation of the unit.
- Mechanical and electrical connection according to applicable standards.
- Start-up and functional validation.
- Client advice for use and maintenance.
This structured approach avoids unpleasant surprises. It also allows the client to better understand why two installations of the same appliance can be very different depending on the building.
A representative example of urban installations in Montreal
This project in Ville-Marie perfectly represents the challenges we often encounter in central Montreal neighborhoods: restricted spaces, ceilings to be opened, existing ducts to be adapted, limited access, importance of interior finishing. It is precisely in these situations that field experience becomes essential.
A successful installation is not only reflected in its final appearance. It is also measured by silent operation, ease of maintenance, stable comfort, and system durability. For this client, the MIDEA EVOX G3 1.5 ton offered a suitable, compact, and consistent solution for the dwelling's needs.
Why call on AirGreen for a central electric furnace
AirGreen regularly works on heat pump, electric furnace, air handler, wall-mounted air conditioner, multi-zone system, and central system projects in Greater Montreal. Our knowledge of local buildings allows us to anticipate constraints that are not always visible during a first call.
In Ville-Marie, as in Laval, Longueuil, on the North Shore and the South Shore, we favor durable, clean, and well-adapted installations to the reality of the building. Our priority is not simply to install a machine, but to deliver a complete, reliable, and easy-to-maintain HVAC solution.
Practical advice after installation
After installing a central air handler, we always recommend to:
- Replace or clean filters according to the recommended frequency.
- Keep access to the unit clear.
- Monitor for any unusual changes in noise or airflow.
- Schedule periodic HVAC maintenance.
- Check that supply and return grilles are not obstructed.
- Retain documents related to the installed model, warranty, and applicable subsidies.
These simple actions extend the system's lifespan and maintain stable performance.
An installation that demonstrates the importance of detail
The success of this MIDEA EVOX G3 1.5 ton electric furnace installation in Ville-Marie is based on a simple principle: in a restricted space, every detail counts. Positioning, access, connection, clearance, and finishing directly influence the final result.
At AirGreen, we treat every project as a unique installation. It is this attention to detail that allows us to offer robust, adapted, and durable HVAC solutions in the most varied buildings in Greater Montreal.
The job tools
Two quick checks with real numbers: what heat costs, and what your current heaters add up to in BTU/h.
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).
