LG MULTI F R32 8-Zone Heat Pump | 48,000 BTU Compressor

A multi-zone architecture designed for real comfort, room by room

In many residential projects in Montreal , Laval , Longueuil , and on the North and South Shores, the problem isn't "lacking BTUs." The problem is the distribution of comfort: a bedroom that stays cool, a living room that heats up in the sun, a basement that's more humid, an upper floor that acts like a greenhouse, or an office used only a few hours a day. This is exactly where the LG MULTI F R32 8-Zone Heat Pump | 48,000 BTU Compressor truly shines.

Here, we're talking about an HVAC system that doesn't just cool or heat "the house." It creates independent zones , each with its own logic, habits, constraints, and balance. This approach addresses three objectives that we consistently prioritize at AirGreen :

• Stabilize comfort (fewer differences from one room to another, fewer manual corrections).

• Avoid conflicts between spaces (bedrooms vs open area, basement vs upper floor, north facade vs south facade).

• Optimize installation during renovation (less invasive than complete ductwork, more flexible than a single centralized solution).

What "8 zones" means in practice

A zone is not necessarily a room. A zone is a volume that shares a coherent thermal dynamic. In a well-designed multi-zone project, zones are grouped or separated according to their use:

• "Night" zone: bedrooms, often prioritizing silence and stability.

• “Day” zone: living room and kitchen, more variations, more internal gains (cooking, appliances, occupancy).

• "Work" zone: office, fixed schedule, need for quick control without disrupting the rest.

• "Basement" zone: slower behavior, often more humidity to manage.

• "Glazed extension" zone: significant solar gains, need for fine modulation.

With an LG MULTI F system, up to 8 indoor units can be powered by a single outdoor unit. This reduces the need for multiple outdoor units, simplifies maintenance, and provides truly useful day-to-day management.

The numbers that structure a project (and why they matter)

In a multi-zone system, technical data is not just for show. It is used to validate the electrical system, noise levels, integration, and long-term reliability:

• Cooling capacity: 48,000 BTU : a solid base for powering multiple zones, while maintaining a modulation reserve.

• Refrigerant: R-32 : a modern choice that fits in with current refrigeration practices.

• Included Wi-Fi : useful for harmonizing instructions, schedules and modes according to actual occupancy.

• Outdoor noise level: 55 dB(A) : key point in dense urban environments (back yards, alleys, side margins).

• Power supply: 220V – MCA 34A – MOP 40A : key figures for a compliant electrical circuit.

• Warranty (Compressor – Parts – Labor): 10-10-0 years : important information to frame the service and additional protection options.

At AirGreen, these figures are always translated into concrete decisions: where to position the outdoor unit, how to distribute the zones, how to plan the piping, what control strategy to propose to the customer, and how to avoid "unstable" behaviors (cycles too short, zones that compete for capacity, inconsistent settings).

From the technical specifications to the actual installation: what AirGreen checks before recommending this 48,000 BTU unit

1) The zone strategy: avoid the "room list", create a comfort plan

In a serious multi-zone submission, the first question is not “how many wall heads”. The first question is: which spaces need to be stable, and which spaces can tolerate more variation.

Typical example – Multi-story property (Montreal / Laval)

• Upstairs rooms: priority is given to silence and a stable temperature .

• Open area on the ground floor: more dynamic management, influence of the sun and the kitchen.

• Basement: needs a system that does not create a "heavy" atmosphere and maintains a good balance.

When we transform these observations into a zoning plan, we obtain a system that is simpler to live with, requiring fewer daily adjustments.

2) Choosing indoor units: adapt the air to the space, not the other way around

Several compatible indoor unit models are available. This choice should be guided by the characteristics of the space:

• Rooms : discreet diffusion and stable modulation are preferred.

• Living room : we favor a capacity to absorb variations in occupancy.

• Basement : we avoid a power that is "too aggressive" which cuts out too quickly and leaves a feeling of dampness.

• Office : we like easy settings, quick recovery, and clear hours.

The detail that makes all the difference: the orientation of the louvers and the automated airflow direction (horizontal/vertical). In practice, poor airflow direction creates draft complaints, even if the machine is highly efficient.

3) Multi-zone piping: where the quality of the installation is seen (and felt)

A multi-zone installation is nothing like a "multiplied single-split". The piping is more structured, with branches, cumulative lengths, heights, and connection points that must be executed rigorously.

At AirGreen, piping is planned like a route:

• reduce unnecessary lengths,

• avoid accumulations of bends and complex passages,

• protect the lines for aesthetics and durability,

• plan for future access (service, inspection, maintenance).

A common mistake to avoid

Doing "the shortest route in one area" and "the longest route in another" without any overall logic. The result: one area becomes less stable, or the system loses its balance when operating simultaneously. A multi-zone system should be conceived as a whole, not as eight separate mini-projects.

4) Electric vehicles: safety, compliance, and long-term peace of mind

On a 48,000 BTU multi-zone system, electrical preparation is fundamental. The MCA 34A and MOP 40A values ​​directly frame the circuit breaker rating, protection, and power supply.

We sometimes see buildings where the panel is already heavily used (renovation, addition of EV charging, electric kitchen, etc.). Our approach:

• validate the actual capacity,

• to propose a clean path,

• avoid “borderline” solutions that become problems in the first serious winter.

5) Noise and location: a detail that changes the relationship with the neighborhood

The advertised outdoor noise level may seem “acceptable” on paper, but the actual experience depends primarily on:

• the fixing surface (wall, slab, supports),

• the transmission of vibrations,

• the proximity of windows, reflective corners, or brick walls.

In many backyards in Montreal and Longueuil , placement is a strategic decision. A good location reduces noise perception, facilitates access to services, and improves air circulation around the unit.

AirGreen Case Study – Duplex on the South Shore: balanced comfort and unobstructed façade

In a renovated duplex on the South Shore , the owner wanted:

• independent monitoring of the rooms,

• a comfortable open area despite the solar gains,

• avoid having two visible outdoor units.

Our solution:

• a zoning plan clearly separating night and day ,

• Indoor units chosen to limit noise in the rooms

• Pipe routing planned to preserve aesthetics (clean line covers, discreet passages),

• final settings adapted to habits: reasonable instructions, calibrated ventilation, simple schedules.

Result observed after commissioning:

• fewer “too hot / too cold” variations

• fewer manual corrections,

• More stable comfort in previously problematic rooms.

AirGreen Case Study – Large house in Laval: glazed extension usable all year round

In a large property in Laval , the glazed extension was difficult to manage: overheating in the sun, rapid cooling in the evening, and constant discomfort. Multi-zone climate control solved the problem:

• an area dedicated to expansion,

• independent management of the main spaces

• simple schedules: active zone when occupied, gentler mode the rest of the time.

The winning feature: modulation . Instead of "forcing" a temperature everywhere, the system responds exactly to the space in question.

What a homeowner experiences on a daily basis with a well-designed multi-zone system

A successful multi-zone system can be achieved through simple actions:

• a room that remains comfortable without over-ventilation

• a living room that doesn't become an "unstable" area as soon as there are people around,

• a basement that doesn't give the impression of heavy air,

• a clear routine: logical instructions and schedules, without micromanagement.

And most importantly: comfort no longer depends on a single room imposing its needs on the entire building.

The most costly mistakes (and how we avoid them)

1) Oversize “for safety”

Oversizing a multi-zone system can create excessively short cycles and less stable comfort. We size systems according to the actual load, insulation, orientation, solar gain, and usage.

2) Design the zones without any occupancy logic

A building is not occupied uniformly. Without an occupancy plan, you get a system that "works", but which is constantly being adjusted.

3) Neglecting access to the service

A multi-zone system should remain easy to maintain. We always plan:

• access to the fittings,

• a clear passage,

• sufficient clearances,

• a clean installation that allows for rapid diagnosis.

4) Poorly managing air direction

Even a high-performance system can feel uncomfortable if the air is directed to the wrong place. We adjust and validate air distribution zone by zone, under real-world conditions.

Why choose AirGreen for an LG MULTI F 8-Zone R32

At AirGreen , our multi-zone approach is centered on actual use and sustainability:

• Analysis of zones : comfort, occupancy, thermal constraints, habits.

• Installation design : logical piping, clean aesthetics, line protection.

• Electrical framework : compliance, safety, realistic solutions.

• Rigorous commissioning : adjustments, validation, clear explanation of operation.

• Solution-oriented monitoring : abnormal behavior is addressed at the cause, not through temporary adjustment.

We install HVAC solutions every week in Montreal , Laval , Longueuil , on the North Shore and the South Shore . On an 8-zone multi-system, experience counts: good results come from structured design and precise execution.

Next Step

For a multi-zone heat pump capable of managing up to 8 zones , with a 48,000 BTU compressor, a clean installation and proper commissioning make all the difference. Contact AirGreen for an on-site assessment and a clear proposal tailored to your building in Montreal , Laval , Longueuil , the North Shore , or the South Shore .