LG MULTI F MAX R32 8-Head Heat Pump | 60,000 BTU Compressor

A multi-zone solution designed for complex buildings in Greater Montreal

At AirGreen , we have been installing HVAC systems for many years in real-world settings: renovated single-family homes, duplexes and triplexes, apartment buildings, professional offices, and commercial buildings in Montreal , Laval , Longueuil , and on the North and South Shores . The LG MULTI F MAX R32 8-head heat pump with a 60,000 BTU compressor is one of the systems we recommend when flexibility, stable performance, and independent zone control are priorities.

This type of equipment is not suitable for standard projects. It meets specific constraints: compartmentalized buildings, limitations of outdoor space, varying thermal needs from one zone to another, or projects where a single outdoor unit must supply several indoor units without compromising comfort.

Understanding how an 8-head multi-zone heat pump works

An LG MULTI F MAX system is based on a centralized architecture: a high-capacity outdoor unit powers up to 8 indoor units , each independently controlled. Each zone can therefore meet its own heating or cooling needs without affecting other spaces.

In practice, this allows, for example:

• Stable heating in north-facing offices

• More intensive air conditioning in spaces with many windows

• Different time slots depending on the actual occupancy of the rooms

• A reduction in frequent thermal conflicts compared to conventional centralized systems

We installed this type of configuration in buildings in Longueuil where each unit required precise control, while retaining only one outdoor unit for aesthetic and regulatory reasons.

Actual capacity and performance in Quebec conditions

The 60,000 BTU rating is just a starting point. This system maintains high performance even in cold weather.

• 42,000 BTU at -8°C

• 46,000 BTU at -15°C

• Certified operation down to -16°C

This data is crucial in the climatic context of Montérégie , the North Shore and Laval , where winter temperature variations put undersized systems to the test.

Why R-32 refrigerant is a real game-changer

The switch to R-32 is not just a regulatory change. In our recent HVAC installations in Montreal , we are seeing tangible benefits:

• Better real-world energy efficiency under partial load

• Reduction of the total amount of refrigerant in the system

• Reduced environmental impact compared to R-410A

• Increased responsiveness to rapid changes in demand

For multi-zone buildings, this stability translates into fewer unnecessary cycles, reduced mechanical wear and tear and better consistency of comfort.

Engineering designed for complex projects

Advanced management of the refrigeration network

This system allows for a total piping length of up to 475.7 feet , with significant height differences between indoor and outdoor units. In three- or four-story buildings in Montreal or Laval , this feature is crucial.

At AirGreen, we pay particular attention to:

• The balanced distribution of line lengths

• The strategic positioning of distribution units

• Strict adherence to maximum elevations

• The precise addition of refrigerant when required

These elements are often overlooked by inexperienced installers, resulting in lost productivity or premature service calls.

Extended compatibility of indoor units

The system accepts several LG wall-mounted, console, and ducted units. This allows us to adapt each area to its specific needs:

• Rooms requiring quiet operation

• Common areas requiring high airflow

• Offices requiring more directional distribution

The indoor noise level can go down to 29 dB(A) depending on the unit chosen, an essential point for high-end rental accommodations or professional environments.

LogisVert grant and financial planning

The $2,100 LogisVert provincial grant (updated November 26, 2025) applies to this type of system when properly configured and installed. We systematically support our clients in:

• Validation of eligibility

• Preparing the required documents

• The consistency between the installed model and the program requirements

On several occasions on the South Shore , clients have contacted us after a third party performed a non-compliant installation, rendering their project ineligible for the subsidy. Thorough planning from the outset prevents this type of situation.

Field feedback: what we observe after installation

In a multi-unit residential building in Laval , equipped with an LG MULTI F MAX 8-zone system, the owner reported to us:

• A significant reduction in comfort-related complaints

• More stable electricity consumption from one month to the next

• Easy management thanks to integrated Wi-Fi controls

In a commercial setting in Montreal , the system made it possible to avoid the installation of several outdoor units, simplifying maintenance and improving the aesthetics of the facade.

Common mistakes to avoid with multi-zone systems

We always emphasize certain critical points:

• Undersize the outdoor unit by assuming that all zones will never operate simultaneously

• Neglecting the balancing of thermal loads by zone

• Improvising the configuration of indoor units without an overall vision

• Ignoring piping and elevation limits

These errors often lead to uneven performance and higher operating costs in the medium term.

Why entrust this project to AirGreen?

At AirGreen , we don't offer this type of heat pump as a universal solution. We only integrate it when the building, its use, and the client's objectives justify it. Our value is based on:

• Precise thermal calculations

• Complete mastery of multi-zone HVAC systems

• Experienced refrigeration technicians

• $5 million liability insurance

• Clear prices, agreed upon before work begins

We regularly operate in Montreal , Laval , Longueuil , on the North Shore , the South Shore and in Montérégie , with a rigorous and transparent approach.

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