LG Multi F MAX LGRED R32 Heat Pump | 3 Heads + 36000 BTU | Montérégie
The LG Multi F Max LGRED R32 36 000 multi-zone heat pump heats and cools 3 rooms with a single outdoor unit. it delivers 29,600 BTU/h at −8 °C, heats down to −25 °C and qualifies for a $3,552 LogisVert grant. Installed by AirGreen in Montréal, Laval, Longueuil, the North Shore and the South Shore.
3 rooms, one outdoor unit.
Compared with the 141 multi-zone systems of 36,000 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 5 heads and modulates from 12,420 to 49,600 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 115 % 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. $120 per 1,000 BTU/h is the rate for ENERGY STAR cold-climate heat pumps (guide v1.10).
Where it ranks among same-size multi-zone systems.
Compared with the 141 multi-zone systems of 36,000 BTU we sell, using the LogisVert list figures. Weaknesses too, said plainly.
Against three other brands in its class.
Same rated size, other manufacturers. Pick the opponent.
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 high-end, multi-zone solution designed for residential and multi-unit buildings in Montérégie
At AirGreen , we have been installing multi-zone systems in real-world settings for many years: complex single-family homes, duplexes, triplexes, apartment buildings, local businesses, and professional offices. The LG Multi F MAX LGRED R32 heat pump – 3 heads – 36,000 BTU – falls squarely into this category of advanced technical solutions, designed to offer flexibility, efficiency, and stability in the demanding climate of Montreal, Laval, Longueuil, the North Shore, and the South Shore , including the entire Montérégie region .
This system allows up to three independent indoor units to be powered by a single outdoor unit, with intelligent power management tailored to the actual needs of each zone. This approach is particularly relevant when heating and cooling loads vary from one space to another, something we observe daily in the field.
Multi F MAX LGRED architecture: what this actually changes in an HVAC installation
A robust outdoor unit designed for the Quebec climate
The outdoor model KUMXA361A is based on a variable-speed scroll compressor inverter architecture, designed to operate over a wide temperature range. In practice, this translates to:
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Heating capacity maintained down to -25°C , a critical threshold for the Montérégie and North Shore regions.
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Precise power modulation, reducing on/off cycles
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Improved thermal stability in each zone, even during prolonged cold spells.
During our installations in semi-rural areas of Montérégie , this type of compressor makes a real difference: fewer fluctuations, fewer complaints related to comfort, and better controlled electricity consumption over the entire season.
R-32 refrigerant: technical choice and real impact
The system uses R-32 gas , a choice we are increasingly favoring at AirGreen for several concrete reasons:
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Reduced global warming potential (GWP) compared to older refrigerants
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Better volumetric efficiency, therefore less fluid required
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Compatibility with current and future environmental requirements
In practice, this also facilitates long-term HVAC maintenance and ensures a better lifespan for the installation.
Multi-zone management: true independence of spaces
Three indoor units, three distinct behaviors
The 3-zone configuration allows you to connect different compatible wall units or consoles (e.g., KNUAK091A, KNUAK121A, KNUAK181A , etc.), each with:
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Its own thermostat
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Its own airflow
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His own logic of demand
In a typical Montérégie home that we recently equipped, this allowed us to:
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A main zone heated continuously
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A guest room kept at a reduced temperature
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A home office with independent air conditioning in summer
Result: targeted comfort and measurable savings , without compromise.
Intelligent power distribution
The 36,000 BTU rated power is not rigidly allocated. The system dynamically adjusts the allocation according to the actual demand of the active zones. This logic is essential in buildings where not all rooms are occupied simultaneously, which is extremely common in our projects in Laval and Longueuil .
Key technical data useful in the context of installation
Without delving into theoretical values disconnected from reality, here are the technical elements that directly influence our installation choices:
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Rated cooling capacity : 36,000 BTU
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Heating capacity maintained at low temperature thanks to LGRED technology
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Controlled external noise levels , important for densely populated residential areas
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Voltage 220 V , MCA and MOP compliant with local electrical requirements
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Built-in Wi-Fi , facilitating remote control and diagnostics
The piping diagrams, maximum permissible lengths and permitted elevation differences are particularly generous on this series, which gives us great design freedom during complex installations or advanced renovations.
Installation in Montérégie: what we systematically adapt
Building analysis prior to any final proposal
Before installing an LG Multi F MAX heat pump , we always analyze:
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The building's thermal envelope
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The actual volumes of each area
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Pipe passage constraints
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The acoustic limits of the neighborhood
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The existing electrical configuration
This step helps to avoid common mistakes: oversizing, poor distribution of zones, or disappointing performance during peak periods.
Distribution Unit Management (DUM)
On Multi F MAX systems, the correct use of the distribution units (BDUs) is crucial. At AirGreen, we pay particular attention to:
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Their internal positioning
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Component insulation
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Strict adherence to maximum lengths and heights
Poor management of these elements is one of the main causes of performance losses that we observe when taking over poorly designed installations.
LogisVert subsidy and actual profitability
At the time of writing, this system is eligible for a provincial LogisVert grant of up to $3,552 , subject to project and installation compliance. In the Montérégie region, this financial assistance significantly improves the return on investment, especially when replacing less efficient electrical systems.
We systematically support our clients in:
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Validation of eligibility
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Document preparation
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The technical compliance required by the program
Why entrust the installation to AirGreen
Choosing a multi-zone heat pump of this size requires more than just a simple connection. At AirGreen , we provide:
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Certified refrigeration technicians experienced with complex systems
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Real-world experience in residential, commercial, and multi-unit housing.
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Transparent pricing , confirmed before work begins
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$5,000,000 liability insurance
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A structured and accessible after-sales service
We operate daily in Montreal, Laval, Longueuil, on the North Shore and the South Shore , with a strong presence in Montérégie .
A suitable solution when comfort does not need to be uniform, but precise.
The LG Multi F MAX LGRED R32 Heat Pump | 3 heads | 36,000 BTU is particularly relevant when each space has its own unique thermal requirements. It's a solution we recommend when precision, stability, and flexibility are more important than standardized approaches.
Proceed to the next step
For a technical assessment , detailed quote , or feasibility study for your building in Montérégie, Montreal, Laval, or Longueuil , contact AirGreen directly. We will guide you toward a solution truly tailored to your project, without approximations.
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: 29,600 BTU/h at −8 °C, 41,500 at −15 °C.
How many heads can I connect?
Up to 5 on this outdoor unit. This product is configured for 3 heads.
How much is the LogisVert grant?
$3,552 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, cold climate, ID 3621279. It also meets the ENERGY STAR Most Efficient criteria, according to the ENERGY STAR database.
Down to what temperature does it heat?
Down to −25 °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.