Project

Installation of a MIDEA EVOX G3 5-Ton Electric Furnace – Central Air Handler System in Blainville on the North Shore

AirGreen installs a 5-ton MIDEA EVOX G3 electric furnace in Blainville: central HVAC system, sealed ducts, clean drainage, and professional finishing on the North Shore.

By AirGreen Climatisation & Chauffage Admin12 min read
Installation of a MIDEA EVOX G3 5-Ton Electric Furnace – Central Air Handler System in Blainville on the North Shore
Installation of a MIDEA EVOX G3 5-Ton Electric Furnace – Central Air Handler System in Blainville on the North Shore
–chapters in this story
12 minreading time
–type of installation
2026year published
The tour

Take a tour of the installation

Each number is a point we check on site. Switch between summer and winter to watch air and heat move.

Generic diagram: central heat pump, indoor module and ducts

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.

  1. It captures or rejects heat outside. It sits on a level base, above the snow, with free space all around.

  2. The insulated refrigerant lines enter the house through a sealed opening and run to the indoor coil.

  3. A shut-off switch near the outdoor unit isolates it safely for service.

  4. Sitting on the indoor module, it moves heat between the house air and the refrigerant.

  5. Electric furnace or air handler: its fan pushes air through the ducts. The electric backup takes over in extreme cold.

  6. Supply ducts bring air to the rooms; returns bring it back to the unit. Their condition matters as much as the unit's.

  7. It protects the coil and the fan. A dirty filter cuts airflow, so it gets checked regularly.

  8. It runs the heat pump and the backup heat. It must be compatible with the installed system.

The job

A central MIDEA EVOX G3 installation in Blainville designed for performance, durability, and technical access

In Blainville, on the North Shore, our AirGreen team installed a MIDEA EVOX G3 5-ton electric furnace, also known as an air handler in a central HVAC system. This project perfectly illustrates the type of installation where the quality of work around the appliance is as important as the appliance itself: connection to existing ducts, sealing, drainage management, future accessibility for maintenance, clean integration into a restricted mechanical space, and system preparation to provide long-term stable comfort.

In the photo, one immediately notices a compact technical environment, with two central modules installed side-by-side, a significant section of metal ducts above the equipment, several ventilation transitions, aluminum-sealed connections, a PVC drainage pipe on the floor, and a typical mechanical space in North Shore residences where every inch counts. This type of installation requires excellent coordination between the mechanical part, air circulation, condensate drainage, and finishing around the ducts.

In this project, our objective was clear: to integrate a MIDEA EVOX G3 5-ton central electric furnace cleanly, safely, and functionally, while optimizing air distribution in the house.

Why choose a MIDEA EVOX G3 5-ton electric furnace?

The MIDEA EVOX G3 is a central solution designed for residential projects where a modern, reliable system compatible with a high-performance HVAC approach is sought. In a good-sized house in Blainville, a 5-ton capacity can meet significant air circulation needs, especially when the duct network serves multiple zones, multiple floors, or large open areas.

An electric furnace or air handler should not be perceived as a simple ventilation box. It is at the heart of indoor comfort. It ensures air circulation, contributes to temperature stability, and works with other components of the central system, particularly when paired with a central heat pump.

Among the sought-after advantages in this type of installation:

  • more uniform air distribution in the house;
  • better compatibility with modern central systems;
  • an electric solution adapted to the Quebec residential market;
  • a clean installation in an existing mechanical room;
  • a solid foundation for long-term HVAC maintenance;
  • possible integration with equipment eligible for certain subsidies depending on the complete project configuration.

For owners in Blainville, Laval, Montreal, Longueuil, the South Shore, or the North Shore, the choice of a central system is never limited to the brand. The quality of the installation directly influences comfort, noise, performance, lifespan, and ease of service.

A compact mechanical room: the real challenge of the project

One of the most important elements of this installation was the available space. In the photo, the unit is placed in a tight mechanical area, with a wall to the right, ducts above, existing ventilation connections, and little frontal clearance around certain elements.

In this type of context, a successful HVAC installation requires precise planning even before positioning the unit. Our technicians must check:

  • the necessary space for access to service panels;
  • the available height under the ducts;
  • alignment with the existing plenum;
  • the possibility of properly sealing the joints;
  • the drainage path;
  • future access for filters, electrical components, and inspections;
  • the stability of the base and the quality of the connections.

A common mistake in central installations is simply "forcing" the unit into the available space, without thinking about the years to come. At AirGreen, we work differently. A central electric furnace must be installed to work today, but also to be efficiently maintained tomorrow.

Duct connection: a crucial step

The duct network visible above the installation shows several metallic transitions and sealed sections. In a central system, the ducts are as important as the unit. Even a high-performance machine can yield disappointing results if the air is poorly directed, if the joints leak, or if the transitions create too much turbulence.

During this installation in Blainville, our team paid particular attention to the sealing of the connections. The metal sections were adjusted to ensure a clean continuity between the MIDEA EVOX G3 5 tons and the existing network. Visible joints were carefully sealed to reduce air loss and promote better static pressure.

A good connection allows for:

  • limiting air loss in the mechanical room;
  • improving distribution to served rooms;
  • reducing vibration noise;
  • preventing dust infiltration into the ducts;
  • supporting better overall system efficiency.

In North Shore residences, we often see duct networks that have been modified several times over the years. When installing a new air handler, it is therefore necessary to adapt to existing conditions without compromising performance.

Drainage management and floor finishing

A very important detail of this installation is the PVC drainage pipe visible at the bottom of the unit. In a central system, condensation management must be clear, reliable, and accessible. Poorly designed drainage can cause water problems, humidity, corrosion, or blockages.

Our team made a clean connection, with a well-positioned outlet and a configuration allowing for efficient drainage. This kind of detail may seem secondary in a photo, but it becomes essential during intensive use, especially when the system is operating in air conditioning mode during hot and humid days.

In Montreal, Laval, Longueuil, on the South Shore and the North Shore, central systems must cope with significant temperature and humidity variations. A well-thought-out installation avoids many unnecessary service calls.

Professional finishing around the equipment

The photo also shows finishing work around the base, ducts, and metal connections. The unit is installed on a solid base, with clean alignment and a finish adapted to the mechanical space. The sealants and tapes used at the junctions are also noticeable.

At AirGreen, we place great importance on this level of finish. Not only because appearance reflects the quality of work, but especially because a neglected finish can lead to air loss, vibrations, infiltrations, and difficulties during maintenance.

A central installation must be:

  • solid;
  • sealed;
  • accessible;
  • well-aligned;
  • safe;
  • durable;
  • easy to inspect.

This approach is particularly important for a MIDEA EVOX G3 5-ton electric furnace, as the unit's capacity requires well-controlled air circulation.

What this installation in Blainville teaches homeowners considering a central system

Proper sizing is not a guess

A 5-ton unit must be chosen based on precise criteria: surface area, insulation, number of floors, fenestration, house orientation, duct configuration, heating and cooling needs, as well as compatibility with other system components.

A unit that is too small risks running constantly without achieving the desired comfort. A unit that is too large can cause short cycles, poor dehumidification, and premature wear. This is why technical evaluation before installation is essential.

At AirGreen, we analyze the reality of the building before recommending a solution. A residence in Blainville does not necessarily have the same needs as a condo in Montreal, a townhouse in Laval, a duplex in Longueuil, or a property on the South Shore.

Service access must be planned from the outset

In this installation, the space around the unit was used strategically. Panels, connections, and service elements must remain accessible. When a contractor installs a system too close to a wall, duct, or obstruction, every future intervention becomes longer, more expensive, and riskier.

A good installer always thinks about maintenance:

  • filter replacement or check;
  • inspection of electrical components;
  • cleaning of accessible ducts;
  • drainage check;
  • joint inspection;
  • diagnosis in case of noise or performance decline.

This long-term vision is part of our approach to HVAC installation.

Duct sealing directly impacts the energy bill

Many homeowners focus on the unit's technical specifications but underestimate the importance of the ducts. However, significant air loss in a mechanical room or a false ceiling can reduce the system's actual efficiency.

In this project, sealing the connections was a central point. The visible ducts were treated with care to reduce leaks and optimize the performance of the MIDEA central system.

Good sealing contributes to:

  • improving comfort in remote rooms;
  • reducing temperature differences;
  • decreasing energy consumption;
  • limiting air noise;
  • protecting mechanical components.

Installation must respect the building's reality

Every house imposes its constraints. In this case, the mechanical space was already occupied by ducts, pipes, cables, close walls, and limited access. Therefore, the MIDEA EVOX G3 electric furnace had to be installed without compromising circulation, drainage, or maintenance.

It is precisely in these projects that field experience makes the difference. Installing a central unit in an existing house requires more than following a standard procedure. It requires reading the building, understanding the air network, anticipating constraints, and adapting the finish.

Common mistakes to avoid during a central installation

For homeowners comparing quotes or planning a central system replacement, here are the mistakes we see most often:

  1. Choosing solely based on price, without analyzing the quality of the installation.
  2. Installing capacity that is too high or too low.
  3. Neglecting the condition of existing ducts.
  4. Forgetting future access for maintenance.
  5. Poorly managing condensation drainage.
  6. Using poorly adjusted duct transitions.
  7. Leaving unsealed joints.
  8. Installing the unit without checking static pressure.
  9. Neglecting vibrations and noise.
  10. Not validating compatibility with available subsidies.

A well-executed central installation can last a long time and provide excellent comfort. A sloppy installation can create problems from the very first season.

A solution adapted to the needs of Blainville homes

Blainville has many single-family homes where central systems are highly relevant. Homeowners often look for a solution capable of efficiently managing large spaces, multiple floors, finished basements, and the typical temperature variations of the North Shore.

The MIDEA EVOX G3 5-ton unit integrates well into this type of project when properly sized and installed. It allows for the construction of a robust central system, compatible with a modern approach to residential comfort.

The Importance of an Experienced HVAC Contractor

The final outcome of an installation largely depends on the team performing the work. A central system requires skills in ventilation, electricity, drainage, duct reading, metal finishing, and integration diagnostics.

At AirGreen, we perform HVAC installations throughout the greater Montreal area, including Laval, Longueuil, the North Shore, and the South Shore. This experience allows us to quickly identify the specific characteristics of each building and propose concrete solutions.

In this project in Blainville, our team delivered a clean, compact, and technically consistent installation, while respecting the real constraints of the mechanical room.

Practical Advice Before Replacing a Central Electric Furnace

Before replacing or installing an electric furnace, we always recommend checking several points:

  • the overall condition of the ductwork;
  • available electrical capacity;
  • drainage configuration;
  • service space around the unit;
  • compatibility with a central heat pump;
  • expected noise level;
  • access to filters;
  • applicable grants depending on the complete system;
  • the quality of the house's insulation;
  • room-by-room comfort expectations.

These checks help to avoid unpleasant surprises and ensure a more suitable system.

A Project Reflecting the AirGreen Method

This installation of a MIDEA EVOX G3 5-ton electric furnace in Blainville clearly demonstrates our working method: real attention to visible and invisible details, respectful integration into the existing space, a clean finish, and a long-term vision of comfort.

For us, a successful installation is not just about getting the unit up and running. It must ensure good airflow, reliable drainage, logical service access, and a finish that inspires confidence. It is this rigor that allows homeowners to fully enjoy their central system, season after season.

The steps

The big day, step by step

The main steps of this kind of job at AirGreen. Every house has its quirks: the estimate brings them out.

Step 1 of 9The on-site estimate

We look at the ducts, the current indoor module, the electrical panel and the planned spot for the outdoor unit.

  1. The on-site estimateWe look at the ducts, the current indoor module, the electrical panel and the planned spot for the outdoor unit.
  2. The quoteThe equipment combination, capacity and price, in writing. We check whether the combination qualifies for assistance programs.
  3. Getting readyAccess protected, old unit disconnected and removed when it is being replaced.
  4. The indoor moduleElectric furnace or air handler, with its coil, connected to the supply and return ducts.
  5. The outdoor unitOn a level base, raised above the snow, with free space all around.
  6. The refrigerant linesInsulated, they enter through a sealed opening and run to the indoor coil.
  7. Electrical and thermostatDedicated circuits, accessible disconnect, a thermostat that works with the heat pump and the backup heat.
  8. Tests and start-upLeak test, vacuum, start-up, airflow check and a test of both modes.
  9. The walkthroughFilter, thermostat, backup heat in extreme cold: what to know before winter.
Your numbers

What would it look like at your place?

Two quick checks with real numbers: what heat costs, and what your current heaters add up to in BTU/h.

Size checkYour electric furnace, in BTU/h
–BTU/h of installed electric heat

    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.

    Mistakes avoided

    Four mistakes we do not make

    Flip each card to see what we do instead.

    Going further

    Your own project, step by step

    Through the seasons

    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.
    At your place

    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.

    0 / 6 checked
    True or false

    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.

    2. In extreme cold, electric backup heat can take over.

    3. The filter only gets changed when the unit breaks down.

    4. You can reuse the old unit's size without checking.

    Frequently asked questions

    What people ask us about this kind of work

    11 questions
    Can I keep my current ducts?
    Often, yes: the central heat pump connects to the existing ducts. We check their condition and size during the estimate.
    What happens in extreme cold?
    The indoor module (furnace or air handler) works with the central heat pump and takes over in extreme cold.
    Furnace, air handler, ducted: what is the difference?
    The furnace or air handler is the indoor module of the central system. A ducted system hides in the ceiling: all you see are small supply grilles.
    Are there grants?
    Depending on the equipment and your situation, assistance programs may apply. AirGreen checks the exact combination before quoting an amount. See the grants.
    Do I need a permit?
    Rules vary from city to city. See permits and by-laws, and we check for your address.
    How much can I save?
    Hydro-Québec says a heat pump can be up to three times more efficient than baseboards for heating in the colder months. The result depends on the house, the climate and how it is used.
    How is the LogisVert assistance calculated?
    For ENERGY STAR cold-climate certified heat pumps, Hydro-Québec lists assistance of $120 per 1,000 BTU/h of heating capacity at −8 °C. AirGreen checks the exact model before quoting an amount; only Hydro-Québec confirms the assistance granted. See the grants.
    Will my current thermostat work?
    Not always: the thermostat has to run the heat pump and the backup heat. We check compatibility during the estimate.
    Central or wall units: which one?
    If the house has ducts in good shape, a central system heats and cools every room at once. Without ducts, wall units or a multi-zone are often simpler. We compare on site.
    Does AirGreen hold the required licences?
    Yes. AirGreen holds RBQ licence 5645-9605-01, subclasses 15.8 Ventilation, 15.10 Refrigeration and 16 Electricity.
    Is the estimate free?
    Yes. The on-site estimate is free and the quote follows within 24 hours. Book my free estimate.

    Could this job help a neighbour?

    Share
    Similar projects

    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.

    All our projects

    Your project

    Every house has its constraints. We see them before we install.

    The on-site estimate is free and the quote follows within 24 hours.

    • RBQ licence5645-9605-01 · 15.8, 15.10, 16
    • EstimateOn site, free
    • QuoteWithin 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).

    Leave a comment