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Installation of a 3-ton MIDEA EVOX G3 electric furnace in Saint-Vincent-de-Paul, Laval: central system with high-efficiency air handler

AirGreen installs a MIDEA EVOX G3 3-ton electric furnace in Saint-Vincent-de-Paul, Laval: central system, air handler, meticulous drainage, and professional HVAC integration.

By AirGreen Climatisation & Chauffage Admin13 min read
Installation of a 3-ton MIDEA EVOX G3 electric furnace in Saint-Vincent-de-Paul, Laval: central system with high-efficiency air handler
Installation of a 3-ton MIDEA EVOX G3 electric furnace in Saint-Vincent-de-Paul, Laval: central system with high-efficiency air handler
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.

A Central Installation Designed for Comfort, Reliability, and Technical Precision

In the Saint-Vincent-de-Paul sector, in Laval, our AirGreen team recently completed the installation of a MIDEA EVOX G3 3-ton electric furnace, integrated into a central system with an air handler. This type of project requires much more than just equipment replacement: it involves understanding the existing configuration, validating mechanical access, respecting ductwork constraints, ensuring reliable drainage, and making a clean connection between the indoor and outdoor components of the HVAC system.

In this installation, the photo clearly shows one of the most important elements of the project: a MIDEA EVOX G3 central air handler installed in a restricted mechanical space, with carefully insulated refrigerant lines, visible copper piping, a PVC drainage connection, and a transparent siphon system for easy visual inspection. This kind of detail might seem secondary to a homeowner, but in the field of central heating and air conditioning, it directly influences the system's performance, durability, and ease of maintenance.

At AirGreen, we approach every HVAC installation as a complete project: indoor comfort, energy efficiency, safety, accessibility for maintenance, quality of connections, cleanliness of finish, and adaptation to the building's realities.

Why a MIDEA EVOX G3 3-ton electric furnace in this sector of Laval?

The Saint-Vincent-de-Paul neighborhood comprises several types of housing: single-family homes, duplexes, renovated properties, older buildings with existing ductwork, as well as residences where mechanical space is limited. In this context, a central electric furnace combined with modern technology like the MIDEA EVOX G3 system can offer a very attractive solution for homeowners who want to improve their comfort without multiplying wall-mounted units in their rooms.

The 3-ton capacity corresponds to central equipment designed to serve a significant area, provided that the sizing is consistent with the house, insulation, sun exposure, quality of the ductwork, and the actual needs of the occupants. A common mistake is to choose a capacity based only on approximate area. In reality, a good choice depends on several parameters:

  • existing air distribution;
  • condition of the ducts;
  • building's thermal losses;
  • ceiling height;
  • number of floors;
  • quality of insulation;
  • presence of large windows;
  • occupants' heating and cooling habits;
  • compatibility with external system components.

In this project in Laval, the objective was clear: to install a MIDEA EVOX G3 central system capable of offering stable comfort, good air circulation, and a clean integration into a technical space already occupied by other mechanical elements.

Installation in a Restricted Space: The Real Challenge of Central Systems

The image shows a rather tight mechanical environment. The air handler is installed close to other equipment, with little room to maneuver around the unit. This reality is common in electric furnace replacement projects or the addition of central heat pumps in homes in Montreal, Laval, Longueuil, the North Shore, and the South Shore.

In this type of space, every inch counts. It's necessary to plan for:

  • sufficient access to service panels;
  • acceptable clearance for future maintenance;
  • a clean path for refrigerant lines;
  • adequate protection of line insulation;
  • reliable condensate drainage;
  • an installation that does not block other equipment;
  • a solid finish to prevent vibrations and unwanted movements.

The quality of an HVAC installation is often seen in the details: pipe alignment, solidity of fastenings, cleanliness of insulation, logic of drainage, and accessibility of components. Here, our technicians worked methodically to maintain functional space around the unit, despite the constraints.

The Central Role of the MIDEA EVOX G3 Air Handler

The air handler is the heart of air distribution in a central system. It receives return air, processes it through the coil, and redistributes it through the ducts to the various rooms of the house. In an installation like this, its performance directly influences the comfort of the occupants.

A good central system must produce more than just a pleasant temperature. It must also offer:

  • regular air circulation;
  • a reduction in temperature differences between rooms;
  • relatively quiet operation;
  • compatibility with heating and cooling cycles;
  • good humidity evacuation in cooling mode;
  • simple and accessible maintenance.

The MIDEA EVOX G3 3-ton model falls into a category of equipment sought after by homeowners who want to modernize their central system while maintaining an efficient, compact approach well-suited to Quebec's climatic conditions.

Visible Connections: An Overview of Technical Care

In the photo, several elements are worth noting. The refrigerant lines are grouped and protected by black insulation, neatly secured. This insulation is essential to limit thermal losses, protect the lines, and ensure stable system operation. Poorly installed insulation can lead to condensation, efficiency losses, or premature degradation.

The visible copper line also shows the importance of a clean routing. In a central installation, the path of the lines must be carefully considered to avoid mechanical stress, friction, and excessive bends. Pipes should not simply be "placed": they must be integrated into the mechanical space in a durable manner.

The PVC drainage, with a transparent siphon, is another important detail. When a central system operates in cooling mode, moisture removed from the air turns into condensate. This condensate must be drained correctly. Poorly designed drainage can cause back-ups, odors, overflows, or damage around the unit. The visible siphon allows for better verification during HVAC maintenance and facilitates diagnosis if a drainage problem arises.

Why Drainage is Often Underestimated

Many homeowners mostly think about the brand, BTU count, or price when shopping for an electric furnace or a central heat pump. Yet, drainage is one of the most important points for long-term reliability. In homes in Laval, Montreal, or Longueuil, we regularly see installations where drainage was done too quickly: insufficient slope, absence of an appropriate siphon, fragile connections, poorly positioned evacuation, or difficult access for cleaning.

In this project in Saint-Vincent-de-Paul, our approach was to install clear, accessible, and logical drainage. The goal is not just for water to flow on the day of installation. The goal is for the system to remain reliable throughout the seasons, especially during prolonged cooling periods.

A Central Electric Furnace Adapted to Quebec's Realities

In Quebec, an HVAC system must contend with very contrasting seasons. Needs are not the same in January as in July. A house may require a strong heating capacity during cold spells, then good humidity management and air conditioning during the summer.

A MIDEA EVOX G3 3-ton electric furnace can be integrated into a very interesting comfort strategy when correctly selected and installed. In several AirGreen projects, particularly in Montreal, Laval, Longueuil, on the North Shore, and on the South Shore, we observe that homeowners are increasingly looking for central systems capable of combining comfort, efficiency, ease of use, and compatibility with financial assistance programs when conditions are met.

However, the issue of subsidies must be approached with precision. Eligibility may depend on the exact model, the combination of units, the AHRI number, the criteria in effect at the time of installation, and the requirements of the applicable program. At AirGreen, we rigorously check these elements to avoid unpleasant surprises. For a homeowner, this validation is essential before making a final decision.

Mistakes to Avoid During a Central System Installation

An installation like this highlights several common mistakes that we recommend avoiding.

Choosing Equipment Without Checking Ducts

A high-performing central system can be limited by poorly designed, dirty, leaky, or unbalanced ductwork. Before installing an air handler, it is necessary to assess whether the air distribution is consistent. A quality machine will not always compensate for inadequate ductwork.

Neglecting Service Space

An appliance installed too tightly, without access to panels or connections, becomes difficult to maintain. This increases future costs and complicates interventions. On this project, we paid particular attention to accessibility despite the restricted space.

Underestimating the Importance of Line Insulation

Refrigerant lines must be properly protected. Incomplete or poorly secured insulation can cause condensation and reduce the overall efficiency of the system.

Installing Drainage Without a Maintenance Logic

A drain must be inspectable, cleanable, and easily understandable by a technician during a future service. The transparent siphon visible in this installation is a good example of a practical choice.

Relying Solely on Price

Price is important, but it should never be the only criterion. A central HVAC installation requires time, experience, and rigorous execution. A less expensive initial installation can become more expensive if it causes problems with drainage, noise, performance, or service access.

What This Installation Reveals About Our AirGreen Method

Our work is not limited to installing a machine. We want every installation to be logical, durable, and adapted to the building. In this project in Saint-Vincent-de-Paul, several technical decisions were made to ensure a reliable result:

  • careful positioning of the air handler;
  • clean connection of refrigerant lines;
  • insulation of exposed lines;
  • installation of accessible drainage;
  • maintenance of reasonable service space;
  • clean finish around the unit;
  • validation of system operation after installation.

This approach is particularly important for central systems, as an installation error can reverberate throughout the house. Unlike a simple wall-mounted unit that serves one zone, a central furnace influences the overall comfort of the building.

A Customer Experience Focused on Clarity

For this type of project, homeowners generally want to understand what will be installed, how long the work will take, what will be modified, and how the system will operate after start-up. We take the time to explain the essential points without overloading the client with unnecessary technical jargon.

In the case of this MIDEA installation in Laval, the mechanical space required precise execution. We therefore paid particular attention to work coordination, component protection, cleanliness of connections, and final verification. These are the steps that differentiate a simply functional installation from a truly professional one.

MIDEA EVOX G3: An Interesting Option for Homeowners in Laval and Greater Montreal

The MIDEA brand is increasingly present in the residential HVAC market in Quebec, especially for homeowners looking for a modern, efficient, and well-positioned solution. The EVOX G3 model is often considered in projects where an existing central system is to be modernized or the overall comfort of a home improved.

For homeowners in Montreal, Laval, Longueuil, the North Shore, and the South Shore, the benefit of a central system like this lies in its ability to serve the entire home through ducts. This allows for a more discreet interior aesthetic than multiple wall-mounted units, while still providing centralized air distribution.

However, success always depends on the quality of the installation. The best equipment can only perform at its best if the connections, ducts, drainage, settings, and commissioning are carried out correctly.

The Importance of Maintenance After Installation

Once the MIDEA EVOX G3 3-ton electric furnace is installed, maintenance remains essential. A central system must be inspected periodically to maintain its performance. Filters must be replaced as needed, drainage must be checked, ducts must remain clean, and components must be inspected during service visits.

Good HVAC maintenance helps to:

  • preserve air quality;
  • reduce the risk of drain blockage;
  • maintain good airflow;
  • limit premature wear;
  • improve comfort consistency;
  • detect anomalies before they become costly.

In an installation like the one in Saint-Vincent-de-Paul, having visible and accessible drainage is a concrete advantage for future maintenance.

An Installation Representative of Current Residential HVAC Needs

This project perfectly illustrates what many homeowners are looking for today: a central, clean, efficient, and well-integrated solution. Homes in Greater Montreal often have their own constraints: narrow mechanical spaces, existing ducts, already installed equipment, high comfort requirements, and realistic expectations regarding energy consumption.

At AirGreen, we adapt our work to these realities. A successful installation is not a standard installation applied everywhere in the same way. It is an installation designed according to the building, the equipment, the client's objectives, and the constraints observed on site.

Why Choose AirGreen for a Central Electric Furnace Installation

Installing an electric furnace, an air handler, or a central heat pump requires a contractor capable of combining field experience, technical rigor, and knowledge of the equipment available in Quebec. Our team regularly intervenes in Montreal, Laval, Longueuil, on the North Shore, and on the South Shore, with an approach focused on installation quality rather than speed at all costs.

For this MIDEA EVOX G3 project in Saint-Vincent-de-Paul, the final result perfectly reflects this vision: a well-positioned central unit, clean connections, clear drainage, and a system ready to serve the home with stability.

Every detail matters. The path of a pipe, the slope of a drain, the insulation of a line, access to a panel, the solidity of a fastener: these are the elements that determine the real reliability of an HVAC system over the years.

The steps

How it goes, from the first call to the end

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

And 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.

    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.
    And at your place?

    Which type of equipment for your project?

    Pick what looks like your need.

    Mistakes avoided

    Four mistakes we do not make

    Flip each card to see what we do instead.

    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.
    Going further

    Useful pages for what comes next

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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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