LG Multi F MAX LGRED R32 Heat Pump | 2 Zones + 42000 BTU | Montérégie

BROCHURE

A multi-zone solution designed for demanding buildings in the Montérégie region

In the Montérégie region , many homeowners, building managers, and contractors are now looking for HVAC systems that offer true flexibility , stable winter heating , and precise control of multiple zones without requiring numerous outdoor units. The LG Multi F MAX LGRED R32 – 2-zone, 42,000 BTU heat pump perfectly addresses this real-world need that we encounter daily at AirGreen.

This system is not designed for standard needs. It is intended for large houses , plexes , multi-unit residential buildings , offices and certain commercial spaces where independent zone control is essential, both for comfort and energy optimization.

At AirGreen, we install this type of configuration in projects where a simple wall-mounted heat pump would be insufficient, but where a complete central system would be neither relevant nor cost-effective.

Multi F MAX Architecture: Understanding what you are actually installing

The LG Multi F MAX LGRED R32 is based on a multi-zone architecture with variable refrigerant flow , allowing up to 6 indoor units to be connected to a single outdoor unit, even though this product sheet is configured here for 2 active zones .

KUMXA421A outdoor unit: the heart of the system

The KUMXA421A outdoor unit offers a nominal cooling capacity of 42,000 BTU and an operating range suitable for cold climates. It is designed to operate in heating mode down to -25°C , with remarkable low-temperature stability.

This unit uses:

• A variable speed scroll compressor

• R-32 refrigerant , more efficient and with a reduced global warming potential

• An intelligent defrosting system optimized for Quebec winters

• Precise electronic management (EEV) to adjust the flow rate according to actual demand

In practice, this means fewer on/off cycles, better controlled consumption and a more stable indoor temperature.

Heating and air conditioning performance in a climate like Montérégie

Winter heating: a non-negotiable criterion

In the Montérégie region , heating is not a secondary consideration. The LGRED Multi F MAX is designed to maintain high capacity even when temperatures drop sharply.

In harsh winter conditions, we observe:

• A maximum heating capacity of around 48,000 to 54,500 BTU depending on the conditions

• Performance is maintained down to -20°C and even down to -25°C depending on the configuration.

In practice, this translates to:

• Less need for supplemental heating

• Improved comfort consistency in remote areas

• A reduction in temperature differences between rooms

Controlled summer air conditioning

With 42,000 BTU of cooling capacity , this system can efficiently serve large areas while modulating its power according to the actual needs of each zone. In summer, this allows for:

• A faster temperature rise

• Better humidity management

• A reduction in unnecessary overconsumption when certain areas do not require cooling

Flexibility of indoor units: a tangible advantage

One of the major advantages of this LG heat pump is its compatibility with a wide range of indoor units :

• Wall-mounted (9,000 to 24,000 BTU)

• Consoles

• Ducted

• Cassettes (depending on the project)

This flexibility allows AirGreen to adapt each project to the architectural reality of the building , without aesthetic or functional compromise.

In several projects in the Montérégie region , we have, for example:

• Installed a wall unit in a main living area

• Combined with a discreet ducted unit for bedrooms

• Maintained a single outdoor unit to limit the external footprint

Technical constraints controlled by AirGreen

A Multi F MAX system cannot be improvised. Pipe lengths, elevation differences, and refrigerant distribution must be calculated precisely.

Key data to respect during installation

• Total piping length up to 475 feet

• Maximum length between outdoor unit and indoor units: approximately 98 feet

• Maximum height difference between indoor units: approximately 49 feet

At AirGreen, each project is subject to:

• From a detailed technical survey

• From a precise calculation of equivalent lengths

• Strategic positioning of distribution units

It is this rigor that guarantees the long-term reliability of the system.

Noise, comfort and residential integration

Despite its power, the outdoor unit maintains a controlled noise level , typically around 54 to 56 dB(A) depending on the operating mode. In practice, this allows for easy installation:

• In a residential backyard

• Near outdoor living areas

• On multi-unit residential buildings without excessive nuisance

Inside, the compatible units descend to very discreet levels, which is particularly appreciated in bedrooms and offices.

Electrical safety and compliance

For this model:

• Voltage: 208-230V

• MCA: approximately 32.5 A

• MOP: 40 A

AirGreen systematically ensures that:

• The electrical panel is compliant

• The protective measures are adequate.

• The installation complies with the Quebec Electrical Code

AirGreen real-life case study in Montérégie

In a recent project in Boucherville , a renovated duplex had very different heating and cooling needs between the ground floor and the upper floor. We installed an LG Multi F MAX LGRED with two separate indoor units, allowing for:

• Independent temperature control

• A significant reduction in comfort-related complaints

• A measured decrease in consumption compared to two independent systems

This type of feedback is common on this model when the sizing is done correctly.

Why entrust this system to AirGreen?

Installing an LG Multi F MAX heat pump is more than just installing equipment. It's a complete HVAC project that requires:

• Genuine multi-zone expertise

• A precise reading of the technical constraints

• Field experience in Montreal, Laval, Longueuil, North Shore, South Shore and Montérégie

At AirGreen , we combine:

• Certified refrigeration technicians

• $5 million liability insurance

• A transparent approach, with no surprises at the end of the project

• In-depth knowledge of programs like LogisVert

A sustainable, scalable and consistent solution

The LG Multi F MAX LGRED R32 heat pump – 2 zones, 42,000 BTU – is a logical choice for those who want a system:

• Powerful without being oversized

• Flexible in its configuration

• Adapted to the climatic realities of Quebec

• Evolving if new areas are added later

Take action with AirGreen

Are you considering a multi-zone HVAC installation in Montérégie , Montreal , Laval , Longueuil , on the North Shore or the South Shore ? Our experts can analyze your building, validate the sizing and offer you a perfectly adapted solution.

Contact AirGreen today for a detailed estimate, a technical visit or specific advice on the LG Multi F MAX LGRED R32 heat pump.