Project

Installation of a Midea central heat pump in Brossard (South Shore)

AirGreen installed a Midea central heat pump in Brossard , with connections to galvanized ductwork and a custom plenum. Their approach focused on airtightness, airflow, and reliability for consistent comfort year-round.

By AirGreen Climatisation & Chauffage Admin4 min read
Installation of a Midea central heat pump in Brossard (South Shore)
Installation of a Midea central heat pump in Brossard (South Shore)
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.

In many Brossard homes, comfort is achieved through a central system capable of providing even heating in winter, efficient air conditioning in summer, and seamless integration with the existing ductwork. At AirGreen , we recently installed a Midea system in a typical setting: a mechanical room with galvanized ductwork, a custom plenum, and refrigerant connections that needed optimizing for maximum efficiency.

The photo clearly shows the indoor unit (central module) and its connection to the ventilation system: this is the heart of home comfort. When this part is well executed, you get stable air distribution, better energy efficiency, and increased reliability season after season.


Type of machine installed: Midea central heat pump

Here, we're talking about a central system (not a mural). The clues are obvious:

  • presence of an indoor unit of the air handler type ;

  • direct connection to a plenum and rigid ducts ;

  • mechanical room environment with adjacent HVAC components.

This type of installation is ideal when you want to:

  • heat/cool the entire house uniformly;

  • enjoy greater comfort on the upper floors;

  • modernize an existing network of conduits (often already present in several houses on the South Shore).


Selected model (consistent with the brand): Midea EVOX G3

When the model label is not legible in the photo, we remain consistent with the Midea core ranges used in residential settings in Greater Montreal. In this case, the most logical choice is:

Midea EVOX G3 (central heat pump – 1.5 to 5 tonnes depending on sizing)

It's a modern solution designed to offer:

  • stable heating performance;

  • efficient air conditioning during heat waves;

  • integration specific to an existing network of conduits.


Visible installation details: what makes the difference

1) Custom-made plenum and transition

We can see a distribution plenum with a transition made and sealed (foil tape) to ensure airtightness. In a central system, this area is critical: an air leak in the plenum means lost energy… and reduced comfort.

At AirGreen, the goal is:

  • solid and watertight joints;

  • a well-directed airflow;

  • a reduction in losses and vibrations.

2) Existing galvanized pipes: optimization rather than “DIY”

Many installations fail not because of the machine itself, but because of an improvised connection to existing conduits. Here, the metal network is already in place, and the task is to properly adapt it to the new Midea equipment.

Our approach:

  • check the sections and the compatibility of the flow rates;

  • limit unnecessary restrictions;

  • to ensure a balanced distribution throughout the house.

3) Refrigeration connections and insulation

On the right, you can see an insulated copper line (essential for limiting heat loss and preventing condensation). This detail is often overlooked, yet it directly influences:

  • efficiency in air conditioning mode;

  • stability in heating;

  • the durability of the components.


Why a central heat pump is often the best choice in Brossard

Brossard combines several realities: family homes, additions, finished basements, open-plan living spaces, and sometimes significant temperature differences between floors. A central heat pump meets these needs very well, especially when the ductwork allows for even distribution.

The most tangible benefits after installation:

  • uniform temperature in most rooms;

  • better humidity management in summer;

  • Increased comfort on the upper floors (less hot/cold temperature difference);

  • reduction of dependence on auxiliary heating.


Key steps we apply at AirGreen for a successful central installation

Although the photo mainly shows the indoor unit, a complete and durable central installation involves strict steps:

  • Validation of clearances and accessibility (future maintenance, filters, drain).

  • Sealing of plenum fittings to prevent air leaks.

  • Condensation drainage management (and overflow prevention).

  • Airflow verification (static, restrictions, network balance).

  • Rigorous commissioning to guarantee performance and reliability.


Maintenance tips to keep your Midea steam generator in top condition (South Shore)

For a central heat pump, maintenance is simple… but essential:

  • replace/maintain the filter at regular intervals;

  • keep the mechanical room clear for good traffic flow and easy access;

  • have the system checked periodically (airflow, drainage, cleanliness of the exchanger);

  • ensure that the pipes do not have leaks or sagging sections.

A well-maintained central system is:

  • fewer breakdowns,

  • better performance,

  • extended lifespan.


Conclusion: a clean, efficient central installation designed for overall comfort

This Midea installation in Brossard perfectly illustrates what matters in central HVAC: a well-integrated indoor unit, a sealed plenum, clean connections, and a consistent air distribution logic. At AirGreen , we emphasize quality workmanship because a high-performing central system starts with flawless installation.

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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