LG MULTI F MAX R32 7-Zone Heat Pump | 54,000 BTU Compressor
The LG Multi F Max R32 54 000 multi-zone heat pump heats and cools 7 rooms with a single outdoor unit. it delivers 37,200 BTU/h at −8 °C, heats down to −16 °C and qualifies for a $1,860 LogisVert grant. Installed by AirGreen in Montréal, Laval, Longueuil, the North Shore and the South Shore.
7 rooms, one outdoor unit, and the most powerful in its class at −8 °C.
Compared with the 7 multi-zone systems of 54,000 BTU we sell. Every number on this page carries its source.
The parts that make a multi-zone system.
Tap a part to learn more.
Outdoor unit
One compressor for the whole house. It supplies up to 8 heads and modulates from 12,420 to 48,000 BTU/h depending on what the rooms call for (NEEP).
Base pan heater
A heater keeps the outdoor unit’s base pan free of ice below 1 °C and during defrost (NEEP).
Refrigerant lines
One pair of lines per head.
Indoor heads
One head per room, each with its own remote and temperature. The combination is chosen in the “Zones” menu.
Control
Each zone is set separately, also from your phone.
Turn rooms on and off. Watch the power being shared.
One outdoor unit supplies every head: when several rooms call at once, they share its capacity. Pick an outdoor temperature.
Tell us your rooms. We tell you if this size is enough.
Pick the number of rooms and their size. The estimate targets a −15 °C day; it is a guide, the real calculation is done room by room at your home.
The whole series at a glance: find the box that fits you.
Each box is a product: the outdoor unit’s size, and the number of heads.
At −15 °C, it still delivers 72 % of its rated capacity.
Tap a temperature: certified capacity, efficiency and the cost of one hour of heating.
It slows down, it speeds up: the certified modulation range
Light bar: from minimum to maximum capacity. Dark mark: the rated value.
At every temperature, cheaper than baseboards.
Cost of one hour at full output, for the same heat delivered. Hydro-Québec Rate D, second tier: 11.142 ¢/kWh.
The official ratings, on the same scales as before.
SEER2, HSPF2 and EER2 come from the AHRI certification. The mark shows the median of the same-size multi-zone systems we sell.
A grant you can calculate, not guess.
The capacity at −8 °C comes from Hydro-Québec’s list of October 1, 2026. $50 per 1,000 BTU/h is the rate for ENERGY STAR heat pumps (guide v1.10).
Where it ranks among same-size multi-zone systems.
Compared with the 7 multi-zone systems of 54,000 BTU we sell, using the LogisVert list figures. Weaknesses too, said plainly.
One multi-zone or several wall units? Both sides, honestly.
We compare both options on your floor plan during the estimate.
What to know before installing a multi-zone system.
Dimensions, wiring and lines, drawn. Then our six steps.
The outdoor unit, dimensioned
One circuit for the whole house
Published sound levels, on one scale.
We use the outdoor figure to choose where the unit goes.
What is particular about this machine.
Only facts published by ENERGY STAR, NEEP or the manufacturer.
Every number, and where it comes from.
Each line carries its source; a line with no published value is not shown.
The manufacturer’s documentation, as PDF.
Everything we have written about this system.
A centralized HVAC solution designed for complex buildings in Quebec
In many high-end residential, multi-unit and light commercial building projects in Montreal , Laval , Longueuil , on the North Shore and the South Shore , one issue constantly arises: how to offer precise thermal comfort by zone , while avoiding the multiplication of outdoor units, electrical overload and aesthetic compromises?
At AirGreen , we encounter this problem every week in the field.
The LG MULTI F MAX R32 7-Zone Heat Pump – 54,000 BTU Compressor – was specifically designed to meet this type of need. It allows you to supply up to 7 separate zones (and even a maximum of 8 zones ) from a single outdoor unit, while maintaining independent comfort control in each space.
Why this multi-zone system is a real game-changer
One compressor, multiple controlled spaces
In an apartment building, an intergenerational home, or a commercial space with enclosed offices, heating requirements vary constantly:
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A south-facing dwelling overheats.
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Another one, on the ground floor, remains cooler.
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A computer office requires stable cooling even in winter.
The LG MULTI F MAX R32 allows each indoor unit to operate according to its own parameters, without affecting other zones. This true independence avoids the common compromises seen in poorly sized systems.
Space saving and preserved aesthetics
Reducing the number of outdoor units is a major advantage, especially in dense urban areas like Montreal or Longueuil . A single outdoor unit:
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simplifies architectural integration,
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reduces clutter on balconies, roofs or backyards,
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facilitates long-term HVAC maintenance.
In several recent projects on the South Shore , this feature has been crucial in obtaining approval from condominium associations.
Key technical specifications of the LG MULTI F MAX R32
Thermal performance adapted to the Quebec climate
This system offers a cooling capacity of 54,000 BTU and maintains reliable heating performance down to -16°C , an essential factor for the winters of Laval and the North Shore .
In real-world conditions, this means:
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stable heating during periods of moderate cold,
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a smooth transition between seasons,
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improved continuity of comfort without excessive reliance on supplementary systems.
Energy efficiency and precise control
Thanks to its advanced design:
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High SEER2 for seasonal air conditioning
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HSPF2 performs well in heating.
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COP optimized even at low temperatures.
These indicators translate concretely into controlled electricity consumption , a point often underestimated when selecting a multi-zone system.
R-32 refrigerant: a technical and environmental choice
R-32 gas offers several concrete advantages:
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better energy efficiency per load
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reduced environmental impact compared to older refrigerants,
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compatibility with current and future HVAC standards.
At our recent installations in Montérégie , this choice also facilitates long-term maintenance and regulatory compliance.
Installation flexibility: an underestimated advantage
Advanced pipe network management
The LG MULTI F MAX R32 allows:
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a total piping length of up to 475.7 feet ,
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significant differences in elevation between internal units,
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a great deal of freedom in the distribution of zones.
This flexibility is crucial in existing buildings, where mechanical pathways often need to adapt to the structure, and not the other way around.
At AirGreen, we installed this model in older buildings in East Montreal where architectural constraints made other solutions impractical. The system allowed for a clean integration, without major demolition.
Compatible with several types of indoor units
Depending on the needs of each area, it is possible to combine different models of LG indoor units:
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murals
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consoles,
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ceiling lights,
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ducted units.
This modularity allows for the optimization of comfort, aesthetics and the overall cost of the project.
Sound management: a critical point in multi-zone systems
In multi-unit housing projects, noise is one of the main sources of dissatisfaction after installation.
The LG MULTI F MAX R32 displays:
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a controlled external noise level (approximately 55 dB(A) ),
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indoor units can go down to 29 dB(A) depending on the model.
In a project completed in Boucherville , a landlord was concerned about complaints from noise-sensitive tenants. After installation, no negative feedback was reported, even during extended nighttime operation.
Power supply, protection and safety
This system operates on 220V , with:
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MCA: 34 A ,
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MOP: 40 A.
These values must be strictly adhered to during installation. An incorrect electrical assessment can lead to:
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unintended triggering,
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premature wear of the compressor,
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non-compliance with standards.
At AirGreen, each project includes a complete electrical validation before installation, in coordination with partner master electricians.
Concrete cases observed in the field
6-unit apartment building – Laval
Objective: to replace six independent, noisy, and energy-intensive systems.
Solution: an LG MULTI F MAX R32 powering 6 wall units.
Result :
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Significant reduction in outside noise.
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improved comfort distribution
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Simplified HVAC maintenance for the homeowner.
Intergenerational housing – North Shore
Initial problem: opposing heating needs between the main residence and the secondary residence.
Solution: 5 independent zones on a single compressor.
Result: each space managed separately, without any conflicting settings.
Common mistakes to avoid with a multi-zone system
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Undersizing the total capacity for the sake of economy.
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Neglecting the actual distribution of charges by zone.
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Improvising the piping without respecting the maximum lengths.
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Entrusting the installation to a team without multi-zone experience.
These mistakes are costly in the long run. It is precisely to avoid them that AirGreen's field expertise makes the difference.
Why entrust this project to AirGreen?
At AirGreen , we don't just sell equipment. We:
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Let's analyze the building's structure,
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Let's validate the actual technical feasibility.
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Let's size each zone precisely.
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We ensure a compliant and durable HVAC installation.
Our experience on hundreds of projects in Montreal , Laval , Longueuil , North Shore and South Shore allows us to anticipate constraints before they become problems.
Conclusion and personalized support
The LG MULTI F MAX R32 7-Zone Heat Pump – 54,000 BTU is a coherent, high-performance, and structured solution for demanding projects where multi-zone management is not a luxury, but a necessity. Its flexibility, efficiency, and design make it a particularly relevant choice in the Quebec context.
Take the next step with AirGreen
For a detailed quote , feasibility analysis , or specific advice tailored to your building, contact AirGreen Air Conditioning & Heating directly. Our team will support you from the initial assessment through to after-sales service, with a clear, transparent, and professional approach.
Warranty: 10 years on the compressor, 10 years on parts and 6 years on labor, straight from the distributor.
What people ask us about multi-zone systems.
Can I heat one room and cool another at the same time?
No. On a multi-zone system like this one, every head works in the same mode, heating or cooling. Each room still keeps its own set temperature.
What happens when every room calls for heat?
They share the outdoor unit’s capacity: 37,200 BTU/h at −8 °C, 39,000 at −15 °C.
How many heads can I connect?
Up to 8 on this outdoor unit. This product is configured for 7 heads.
How much is the LogisVert grant?
$1,860 according to Hydro-Québec’s list of October 1, 2026. The grant never exceeds 100 % of the cost before taxes; apply within 9 months of installation.
Is it ENERGY STAR certified?
Yes, ID 3621275. It also meets the ENERGY STAR Most Efficient criteria, according to the ENERGY STAR database.
Down to what temperature does it heat?
Down to −16 °C.
Is it noisy?
Indoors, the reference head goes down to 29 dB(A). Outdoors, 55 dB(A): we place the unit away from bedroom windows.
Why a multi-zone instead of several wall units?
One outdoor unit on the wall and one circuit. In return, the rooms share the capacity, and if the outdoor unit stops, every zone stops.
What does the warranty cover?
Our sheet lists 10 years on the compressor and 10 years on parts. AirGreen extended warranty: possible.
A multi-zone system is planned room by room. At your home.
We measure every room, draw the line route and choose the right head for each zone. The on-site estimate is free and the quote arrives within 24 h.