LG Multi F MAX LGRED R32 Heat Pump | 4 Heads + 36000 BTU | Montérégie

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

In many residential and multi-unit projects in the Montérégie region , we encounter the same constraint: providing precise comfort in each zone without increasing the number of outdoor units or sacrificing winter heating performance. The LG Multi F MAX LGRED R32 heat pump – 4 heads – 36,000 BTU – perfectly addresses this need.

At AirGreen , we regularly install this system in multigenerational homes, renovated duplexes, large condos, and light commercial buildings in Montreal , Laval , Longueuil , and on the North and South Shores. This model is ideal when flexibility, reliability, and thermal stability are priorities.

Understanding the Multi F MAX LGRED architecture

One outdoor unit, several independent zones

The heart of the system is the LG KUMXA361A outdoor unit, designed to supply up to 4 active zones (expandable to up to 5 zones depending on the configuration). Each indoor unit operates independently: temperature, airflow, schedules, and modes can be adjusted room by room.

This approach allows for:

• a fine-tuned management of comfort ,

• a reduction in energy consumption compared to poorly zoned centralized systems,

• discreet integration on facades and roofs.

R-32 refrigerant: technical and environmental choice

The system uses R-32 gas , known for:

• a lower global warming potential than older refrigerants,

• improved thermodynamic efficiency ,

• optimal compatibility with current and future standards.

In AirGreen installations, this choice translates into better heating stability in cold weather and sustainable long-term efficiency.

Actual capabilities and behavior in the Quebec climate

Power suitable for harsh winters

With a nominal capacity of 36,000 BTU , this heat pump is designed to maintain comfort even when demand is high:

• reliable operation down to -25°C

• Available power of approximately 29,600 BTU at -8°C ,

• enhanced capacity at very low temperatures thanks to LGRED technology.

In practice, we have installed it in several residences on the South Shore where it provides the main heating, without systematic recourse to a backup system.

Balanced cooling in summer

In air conditioning mode, multi-zone distribution helps prevent the temperature fluctuations common in large open spaces. Each indoor unit precisely modulates its airflow, improving comfort while reducing unnecessary compressor cycles.

Interior units: flexibility and architectural integration

Compatible with multiple LG formats

The Multi F MAX accepts various models of wall-mounted, ceiling-mounted, or ducted indoor units. In this 4-head configuration, we often prefer wall-mounted units for:

• their quiet operation (approximately 29 to 38 dB(A) depending on the model),

• their simplified maintenance ,

• their discreet visual integration .

Each indoor unit has:

• integrated Wi-Fi ,

• precise control of the vertical and horizontal flaps,

• of individual airflow management.

Installation: what the AirGreen experience changes in concrete terms

Controlled refrigerated distribution

The Multi F MAX system relies on refrigerant distribution via bypass modules . Their positioning is critical:

• maximum pipe lengths respected,

• Controlled elevation differences between units,

• balance of thermal loads between zones.

These technical parameters directly influence the performance and longevity of the system.

Safe power supply

For this model:

• Voltage : 220 V,

• MCA : 33 A,

• MOP : 40 A.

At AirGreen, we always validate the capacity of the electrical panel before installation to avoid any overload or unforeseen modification after work.

Real-life example: quadruple zone on the South Shore

In a renovated duplex in Boucherville , the client wanted:

• to maintain thermally independent rooms,

• avoid multiple visible outdoor units

• reduce long-term energy costs.

We installed an LG Multi F MAX 36,000 BTU – 4 heads , covering:

• two bedrooms upstairs,

• an open-plan living room,

• a closed office in the basement.

Result :

• Stable comfort in both winter and summer.

• Significant reduction in outside noise.

• access to the LogisVert grant of $3,552 applicable at the time of installation.

Points to know before choosing this model

Who is this system suitable for?

• multi-story houses,

• plex and multi-unit dwellings,

• light commercial businesses requiring precise zoning,

• projects where exterior aesthetics are a key issue.

Common mistakes to avoid

• undersize the zones,

• ignore piping limitations,

• entrusting the installation to a team not specialized in multi-zone systems .

These errors often lead to performance losses and premature compressor wear.

Why entrust this project to AirGreen?

At AirGreen Heat Pumps, Air Conditioning & Heating , we don't just install equipment:

• detailed thermal analysis

• configuration adapted to each building

• Transparent pricing , no surprises.

• certified refrigeration technicians,

• $5 million liability insurance

• comprehensive support for provincial grants .

Our field expertise in Montreal , Laval , Longueuil , on the North Shore , the South Shore and in Montérégie makes the difference on complex systems like the Multi F MAX.

Conclusion: a highly adaptable solution for lasting comfort

The LG Multi F MAX LGRED R32 heat pump – 4 heads – 36,000 BTU is designed for projects where precision, winter performance, and flexibility are essential. When properly installed, it becomes a reliable, quiet, and scalable central system, perfectly suited to Quebec's climate.

Need a technical opinion or a quote?

Contact AirGreen today for a personalized assessment of your project in the Montérégie region , including Montreal , Laval , Longueuil , the North Shore , and the South Shore . We support you from the initial analysis to full commissioning.

Call us at 514-316-2973 or email us at sales@airgreen.ca

Warranty: 10 years on the compressor, 10 years on parts and 6 years on labor, straight from the distributor.