Project

Installation of a MIDEA EVOX G3 2.5-ton electric furnace with central Air Handler system in LaSalle

AirGreen installs a MIDEA EVOX G3 2.5-ton electric furnace in LaSalle with a central Air Handler system, adapted ducts, and careful HVAC finishing for lasting comfort.

By AirGreen Climatisation & Chauffage Admin14 min read
Installation of a MIDEA EVOX G3 2.5-ton electric furnace with central Air Handler system in LaSalle
Installation of a MIDEA EVOX G3 2.5-ton electric furnace with central Air Handler system in LaSalle
–chapters in this story
14 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 installation designed for stability, comfort, and precision in a LaSalle home

In this project carried out in LaSalle, our AirGreen team installed a MIDEA EVOX G3 2.5-ton electric furnace, integrated into a central Air Handler system. This type of installation requires special attention, as it's not just about replacing a unit: it's essential to ensure complete compatibility between the indoor unit, existing ducts, available mechanical space, electrical connections, airflow, and the property's actual comfort needs.

The job site photo shows a typical residential mechanical room environment: restricted space, existing metal ducts, open wall structure nearby, pending wiring, air return, and limited technical access. These are precisely the conditions that demand a rigorous, clean, and planned HVAC installation. In an area like LaSalle, where single-family homes, duplexes, triplexes, and progressively renovated properties are found, each central installation must be adapted to the building, not just installed according to a standard model.

The MIDEA EVOX G3 2.5-ton is a modern solution for homeowners looking to improve their indoor comfort, optimize air distribution, and prepare their home for more stable energy performance. In this specific case, the unit was installed vertically, connected to the existing ductwork, with careful attention to mechanical alignment and future accessibility for maintenance.

Why a MIDEA EVOX G3 central electric furnace in this property?

The choice of an electric furnace with a central Air Handler system is particularly relevant when a property already has ductwork or when an owner wishes to standardize comfort in multiple rooms from a single system. Unlike an individual wall-mounted solution, the central system distributes conditioned or heated air through ducts, ensuring a more uniform feeling throughout the entire house.

In this LaSalle installation, the goal was clear: to provide a reliable, compact, and well-integrated central solution in a mechanical space already occupied by various building and service elements. The MIDEA EVOX G3 2.5-ton unit is well-suited for this type of project due to its format adapted to residential installations, its modern design, and its compatibility with high-efficiency central systems.

A capacity of 2.5 tons generally corresponds to approximately 30,000 BTUs, a power frequently used for medium-sized homes when load calculations, insulation, room configuration, and client needs permit. At AirGreen, we never choose a capacity based solely on approximate surface area. We consider several elements: the age of the building, sun exposure, window quality, number of floors, ductwork, available airflow, and the owner's comfort expectations.

Site assessment: a technical space requiring precision

The image shows several important details. The indoor unit is installed in a storage space or a compact mechanical room, with storage shelves nearby, adjacent metal ducts, and a partially open wall structure. This type of environment dictates practical decisions from the outset.

The first challenge is access. A central electric furnace must remain accessible for future maintenance, filter replacement, inspections, electrical checks, and ventilation adjustments. In this project, the location was designed to preserve reasonable access to the unit's service panels. The black fasteners visible on the unit's front allow for secure opening of the panels, which is essential for any future intervention.

The second challenge is alignment with the ducts. An Air Handler only functions correctly if airflow is well directed, without excessive restriction or significant leaks. In the photo, we observe the immediate proximity of insulated and sealed metal ducts. Our team therefore had to ensure a clean junction between the unit and the network, while respecting the constraints of the available space.

The third challenge is connection management. The visible wires, flexible electrical conduits, and pending elements show that such a site is built in coordinated stages. A central installation is not limited to simply placing the unit on the floor: circuits, clearances, stability, safety, mechanical protection, and finishing around the connections must be validated.

A central HVAC installation that requires more than a simple replacement

In several homes in Montreal, Laval, Longueuil, on the North Shore and South Shore, we encounter central installations where the old unit was replaced quickly, without a thorough check of the distribution network. This often leads to comfort problems: rooms too cold, ground floor too hot, excessive noise in the ducts, high static pressure, short cycling, or difficult maintenance.

For this MIDEA EVOX G3 2.5-ton installation in LaSalle, our approach was to consider the entire system. The proper functioning of a central electric furnace depends as much on the unit itself as on its mechanical environment. A high-performance unit poorly connected will never deliver its full potential.

We therefore paid attention to several essential points:

  • the stability of the unit on the floor;
  • alignment with existing ducts;
  • accessibility of service panels;
  • protection of connections;
  • continuity of airflow;
  • ease of filter replacement;
  • finish around metal junctions;
  • general safety of the technical space.

This rigor is particularly important in homes where the mechanical space also serves as storage. Products, boxes, tools, or objects stored near an HVAC appliance can sometimes complicate access or impair ventilation. Our role is also to advise the client on the space to keep clear around the equipment to preserve the system's performance and safety.

The concrete advantages of a central Air Handler system

A central Air Handler system offers several advantages when properly sized and installed. For the owner of this LaSalle home, the goal was to achieve more uniform air distribution, better integration with the ducts, and a solution capable of supporting daily comfort without multiplying visible units in the rooms.

Among the most important benefits is discretion. The main equipment is located in the mechanical room, while air is distributed through existing grilles. This suits homeowners who want to maintain a clean interior aesthetic.

There is also uniformity. When ducts are in good condition and airflow is well adjusted, a central system can provide stable comfort in several areas of the home. This is particularly appreciated in family homes, properties with multiple bedrooms, or buildings where occupants want to avoid significant variations from room to room.

Finally, a central system often facilitates integration with other HVAC components, such as a central heat pump, humidifier, enhanced filtration system, or certain indoor air quality accessories. This flexibility is a major advantage for homeowners who wish to progressively modernize their home.

MIDEA EVOX G3: a modern solution for residential projects

The MIDEA EVOX G3 range is often chosen for projects where a good balance between performance, accessibility, efficiency, and adaptability is sought. In the field of residential HVAC, MIDEA has established itself as a prominent brand in the Canadian market, thanks to equipment designed to meet the needs of modern homes and energy renovations.

In this installation, the 2.5-ton capacity allows for central distribution adapted to the building's configuration. The role of the electric furnace or Air Handler is to ensure controlled air movement in the ducts, while integrating the necessary electrical elements for heating when required.

This type of appliance can be particularly relevant in projects where the aim is to reduce reliance on older, less efficient systems or to modernize an existing installation without completely transforming the home's interior architecture.

Specific challenges encountered during installation

Every central installation brings its own set of constraints. In this LaSalle project, the main difficulty was related to the available space around the unit and the presence of building elements very close to the system. The open wall structure on the right, existing ducts, and pending connections required precise coordination.

In a compact mechanical room, a few centimeters can make a big difference. A poorly positioned appliance can make maintenance difficult, force ducts, create vibrations, or complicate electrical connections. Our team therefore worked carefully on the unit's placement, considering both the present and the future: not only did the installation have to function today, but it also had to remain accessible for future maintenance.

Duct management also represented an important aspect. A metal connection must be stable, well-adjusted, and properly sealed. The visible junctions around the unit show the level of precision required to integrate the equipment into an existing network without creating unnecessary losses. Good sealing helps limit air leaks, improve system performance, and maintain more efficient distribution.

The importance of the filter and future maintenance

In the photo, a filter is visible near the equipment, which highlights an often underestimated point: the maintenance of a central system begins with filter access. A neglected filter can reduce airflow, increase system pressure, cause noise, decrease comfort, and unnecessarily strain internal components.

During a central HVAC installation, we therefore pay particular attention to ease of filter access. A well-installed system should allow the owner or technician to replace the filter without having to move a significant amount of objects or dismantle unnecessary elements.

We generally recommend checking the filter regularly, especially in homes with pets, ongoing renovations, frequent dust, or heavy heating and cooling use. Simple yet consistent maintenance protects the owner's investment.

Mistakes to avoid during central electric furnace installation

An installation like this may seem simple at first glance, but several common mistakes can compromise the result.

The first mistake is to choose a capacity based solely on an approximate rule. A MIDEA EVOX G3 2.5-ton electric furnace may be ideal in one home and unsuitable in another if the thermal loads are not comparable. Sizing must always be carefully considered.

The second mistake is neglecting the ductwork. A new appliance connected to improperly sized or poorly sealed ducts can yield disappointing results. The client then believes the appliance is at fault, when the problem often stems from air distribution.

The third mistake is sacrificing technical access. In many mechanical rooms, attempts are made to maximize storage space, but an HVAC appliance must remain accessible. Panels, filters, electrical connections, and ducts must be inspectable.

The fourth mistake is not planning for the finish. A temporary joint, a poorly sealed connection, or incomplete protection can create problems over time. At AirGreen, we know that a durable installation depends as much on visible details as on hidden elements.

A project representative of central installations in Montreal and the surrounding areas

This LaSalle project clearly illustrates the realities of the residential market in Greater Montreal. Homes are rarely identical. Some have been renovated multiple times, others have compact mechanical rooms, modified ducts, or significant access constraints. This is why our team regularly works on similar projects in Montreal, Laval, Longueuil, on the North Shore, and the South Shore, with an approach adapted to each building.

We have carried out central installations in finished basements, mechanical spaces shared with water heaters, residential warehouses, insulated garages, and homes where existing ducts required correction before installing the new appliance. This experience allows us to anticipate problems before they become costly.

In the case of this MIDEA EVOX G3 2.5-ton electric furnace installation in LaSalle, our priority was to deliver a clean, accessible, and consistent system with the existing structure. The equipment had to integrate into the space without compromising maintenance, airflow, or safety.

The result: a clean, robust installation ready for lasting central comfort

The final result is a central installation that meets the client's needs while respecting the building's real constraints. The MIDEA EVOX G3 2.5-ton is stably positioned, connected to the ductwork, and prepared to provide efficient air distribution through the central system.

This type of project demonstrates the value of a specialized HVAC team. A good installation is not limited to the brand or model chosen. It relies on understanding the building, the quality of connections, respect for clearances, electrical coordination, duct finishing, and understanding the client's expectations.

At AirGreen, we place particular importance on these details because they determine the real comfort after installation. A new appliance must be efficient, but above all, it must be well integrated. This difference is what allows for a quieter, more stable, easier-to-maintain, and better-suited system for the home.

Practical advice for homeowners considering a central system

For homeowners in LaSalle, Montreal, Laval, Longueuil, the North Shore or the South Shore who are considering installing a central electric furnace or an Air Handler, a few tips can help avoid unpleasant surprises.

Before choosing a model, the mechanical space must be evaluated. Available height, access to ducts, passage width, proximity to walls, and the possibility of future service are important elements.

Existing ducts must also be examined. Ducts that are too small, damaged, or poorly sealed can limit the performance of the new appliance. In some cases, a partial correction of the network can significantly improve comfort.

Finally, maintenance must be considered. A central system is a long-term investment. The filter, access panels, electrical connections, and internal components must remain accessible. A well-thought-out installation today reduces complications tomorrow.

AirGreen: a local, technical, and transparent approach

AirGreen supports homeowners in their heating, air conditioning, heat pump, electric furnace, central system, and HVAC maintenance projects throughout Greater Montreal. Our approach is direct: we analyze the building, explain the available options, and install the equipment according to the actual requirements of the site.

For this installation in LaSalle, the photo truly reflects the type of work we regularly perform: a modern central unit, installed in an existing space, with concrete constraints and significant technical decisions. It is precisely in this kind of context that experience makes the difference.

A successful HVAC installation is not only measured on the day it is commissioned. It is measured in the months and years that follow: constant comfort, easy access, stable operation, simplified maintenance, and owner satisfaction. It is this long-term vision that guides our work at AirGreen.

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.

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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).

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