LG MULTI F MAX R32 4-Zone Heat Pump | 54,000 BTU Compressor

BROCHURE

A centralized and precise HVAC solution for complex buildings in Quebec

At AirGreen, we've been installing HVAC systems long enough to know that a multi-zone system is never just a catalog choice. It's a strategic decision that impacts a building's comfort, energy efficiency, and long-term reliability. The LG MULTI F MAX R32 4-Zone Heat Pump with a 54,000 BTU compressor is specifically designed for these demanding projects: large residences, multi-unit residential buildings, commercial spaces, offices, or hybrid buildings.

This LG model stands out for its ability to power up to 8 indoor units , while offering independent zone management, excellent heating stability in cold climates, and unparalleled installation flexibility. In the Montreal, Laval, Longueuil, North Shore, and South Shore areas, we often encounter buildings with complex architectural constraints: low ceilings, multiple partitions, staggered floors, and significant duct lengths. It is precisely in this context that this system proves its worth.

A multi-zone architecture designed for real-world projects

Independent management of zones, without compromise

The LG MULTI F MAX R32 allows you to simultaneously connect several types of indoor units: wall-mounted, ducted, console, or ceiling-mounted, depending on the specific needs of each zone. In a duplex or triplex in Montreal, for example, we can configure:

• one zone for each dwelling,

• an area dedicated to common areas,

• a separate area for an office or shop on the ground floor.

Each zone benefits from its own temperature control, airflow, and scheduling, without negative interaction with other spaces. This approach significantly reduces complaints related to comfort differences between rooms, a common problem with traditional centralized systems.

Up to 8 zones on a single outdoor unit

Although this configuration is often used in a quad-zone setup, the system accommodates up to 8 indoor units , allowing for future building expansion without replacing the outdoor compressor. We recently installed this model on the South Shore , in a residential building where the owner initially wanted to air-condition four apartments and then gradually add more zones during subsequent renovations.

Thermal performance adapted to the Quebec climate

Reliable heating down to -16°C

The 54,000 BTU compressor provides stable heating power down to -16°C , with a capacity maintained at over 39,000 BTU at -15°C . In practice, this means the heat pump continues to provide efficient primary heating for most of the Quebec winter, reducing the need for backup systems.

In several installations in Laval and on the North Shore , we measured a significant reduction in electricity consumption compared to older dual-energy or direct electric systems, while maintaining constant comfort even during cold spells.

High energy efficiency

This system displays remarkable efficiency indicators:

• SEER2 greater than 20 in air conditioning,

• High HSPF2 for seasonal heating,

• High COP at -8°C , a sign of excellent electricity conversion into useful heat.

These features make the LG MULTI F MAX R32 Heat Pump eligible for the LogisVert grant , currently valued at $1,860 , subject to project eligibility and applicable conditions.

R-32 refrigerant: a coherent technical and environmental choice

The choice of R-32 is not insignificant. At AirGreen, we have observed several concrete advantages in the field:

• better heat transfer

• reduced refrigerant charge,

• lower environmental impact compared to older gases.

On urban construction sites in Montreal , where regulatory and environmental constraints are becoming increasingly strict, this type of refrigerant represents a real advantage in the medium and long term.

Installation flexibility is essential in urban environments.

Significant pipe lengths and elevation changes

The LG MULTI F MAX R32 accepts:

• a total length of pipes exceeding 475 feet ,

• height differences of up to nearly 100 feet between units.

In practical terms, this allows us to install the outdoor unit on a roof, in a backyard, or in a remote technical space, while efficiently serving indoor units spread across multiple floors. This flexibility is crucial in Longueuil 's multi-unit residential buildings or the narrow commercial buildings in the city centre.

Acoustic comfort: an often underestimated aspect

The outdoor noise level of approximately 55 dB(A) remains very acceptable for a system of this capacity. Indoors, some compatible units can operate at less than 30 dB(A) depending on the model and configuration chosen.

In several residential projects, particularly condominiums on the South Shore , this aspect has been crucial in obtaining approval from the condominium association and ensuring the peace and quiet of the occupants.

Real-life case: multi-unit apartment building in Montreal

We recently installed an LG MULTI F MAX R32 54,000 BTU in a four-unit apartment building in the Plateau-Mont-Royal neighborhood. There were many constraints:

• Limited outdoor access

• strict acoustic requirements

• long pipe lengths,

• owner's desire to maintain independent control over each unit.

The LG multi-zone solution enabled:

• a single, discreetly positioned outdoor unit,

• four completely independent zones,

• a significant reduction in operating costs,

• eligibility for provincial subsidies.

The owner particularly appreciated the stability of the heating and the ease of management via the integrated WiFi , both for tenants and for maintenance.

Key points to consider before installation

At AirGreen, we always emphasize certain elements before recommending this type of system:

• precise sizing of zones and indoor units,

• strict adherence to pipe lengths and slopes,

• appropriate selection of distribution modules (BD Units) ,

• Electrical installation compliant with MCA of 34 A and MOP of 40 A.

A poorly planned installation can negatively impact overall efficiency, even with excellent equipment. That's why we always conduct a comprehensive building analysis before any multi-zone HVAC installation.

Why entrust this project to AirGreen?

Choosing AirGreen means benefiting from:

• certified refrigeration technicians specializing in multi-zone systems,

• from concrete experience on complex residential and commercial projects,

• $5 million in liability insurance ,

• clear, unsurprising support from the quote to commissioning.

We operate daily in Montreal, Laval, Longueuil, on the North Shore and the South Shore , with in-depth knowledge of local realities, subsidies and regulatory requirements.

A sustainable and scalable HVAC solution

The LG MULTI F MAX R32 4-Zone Heat Pump | 54,000 BTU represents a wise investment for homeowners seeking a scalable, high-performance, and reliable solution. Properly designed and installed, it meets current needs while allowing for future expansion.

Take action

For a complete assessment , a detailed quote , or to verify your project's eligibility for available subsidies, contact AirGreen directly. Our team will support you every step of the way, from technical analysis to final installation.