LG Multi F MAX LGRED R32 Heat Pump | 5 Heads + 36000 BTU | Montérégie
The LG Multi F Max LGRED R32 36 000 multi-zone heat pump heats and cools 5 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.
5 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 6 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 multi-zone solution designed for the demanding buildings of the Montérégie region
At AirGreen , we have been installing multi-zone HVAC systems for many years in real-world situations: single-family home extensions, renovated duplexes, local businesses, and mixed-use buildings in the Montérégie region , Montreal , Laval , and on the South and North Shores . The LG Multi F MAX LGRED R32 heat pump with 5 heads and 36,000 BTU is specifically designed for these projects where precise zone management, cold-weather performance, and long-term reliability are key priorities.
This system allows multiple indoor units to be powered by a single outdoor unit, while maintaining independent zone control. In practice, this means rooms with different temperatures, a reduced outdoor footprint, and optimized energy efficiency throughout the building.
Technical architecture and engineering choices
A variable-speed compressor and proven multi-zone logic
The heart of the system lies in a variable-speed inverter compressor, designed to precisely modulate power according to the actual demand of each zone. This modulation avoids the frequent on/off cycles observed in less advanced configurations, thus reducing mechanical wear and stabilizing thermal comfort.
In the multi-zone HVAC projects we undertake, the Multi F MAX logic balances the available capacity between connected indoor units. When one zone requires more heating or cooling, the system adjusts the distribution without impacting other areas, within the capacity limits specified in the design.
R-32 refrigerant and compliance with current standards
The choice of R-32 refrigerant is part of an effort to reduce the environmental footprint and improve volumetric efficiency. In real-world conditions, this facilitates achieving high performance while meeting current regulatory requirements for modern HVAC systems. This approach is particularly relevant for projects eligible for provincial grant programs, including LogisVert , when the criteria are met.
Managing pipe lengths and elevation changes
An aspect often underestimated by homeowners is managing refrigerant line lengths and elevation differences between units. In the field, in the Montérégie and Longueuil regions, we frequently encounter complex configurations: outdoor units on rooftops, indoor units distributed across multiple floors, and limited service access. The Multi F MAX LGRED tolerates significant total lengths and substantial height differences when designed and installed according to best practices, opening the door to realistic solutions where other systems reach their limits.
Heating and air conditioning performance in the Quebec climate
Stable heating in cold weather
In our HVAC installations on the South Shore and North Shore , low-temperature heating capability is a key factor. This model is designed to maintain reliable heat output even when temperatures drop well below freezing. In practice, this translates to a dependable primary heating system for much of the winter season, with a smoother transition to backup systems when needed.
We have observed, in recent residential projects, that the stability of the power delivered contributes to a more homogeneous feeling of comfort, without marked fluctuations between cycles.
Precise multi-zone air conditioning
In cooling mode, the 36,000 BTU capacity allows for efficient cooling of multiple spaces simultaneously. Each indoor unit adjusts its airflow and power according to local demand, preventing over-cooling of certain rooms. For buildings with fluctuating occupancy—offices, retail spaces, or residences with teleworking—this granular control is a real advantage.
Compatible indoor units and layout scenarios
Format flexibility
The LG Multi F MAX LGRED R32 accepts a variety of compatible wall-mounted indoor units, allowing the system to be adapted to the architecture and use of each room. Within a single project, we regularly combine different capacities to suit the actual size and orientation of each area.
Concrete example in Montérégie
In a recent project in the Montérégie region , an intergenerational residence required five distinct zones: two open-plan living areas, two upstairs bedrooms, and a basement office. A single Multi F MAX outdoor unit centralized the installation, reduced the visual impact on the exterior, and provided independent control for each occupant. The result was a measurable improvement in comfort and more consistent energy management throughout the building.
HVAC Installation: Critical Points and Mistakes to Avoid
Sizing and balancing
A common mistake is simply adding up the nominal capacities of the indoor units without taking the simultaneity factor into account. At AirGreen , we conduct a detailed load analysis to avoid costly oversizing or, conversely, an overly restrictive configuration.
Installation of the outdoor unit
The positioning of the outdoor unit directly influences the perceived noise level and ease of maintenance. In Laval and Montreal , we prioritize locations offering good air circulation, safe access for servicing, and discreet integration into the building.
Quality of implementation
The actual performance of a multi-zone system depends heavily on the quality of the installation: careful brazing, rigorous vacuuming, proper management of pipe lengths, and precise control configuration. These elements are integral to our approach to HVAC maintenance and after-sales service.
Reliability, maintenance and long-term service
Preventive maintenance
A well-maintained Multi F MAX system retains its performance for longer. We recommend periodic maintenance including filter cleaning, pressure checks, and inspection of critical components. This approach reduces the risk of breakdowns and extends the equipment's lifespan.
Guarantee and peace of mind
The manufacturer's warranty covers major components (10 years on the compressor and parts), labor is covered for 6 years straight from the distributor, and additional warranty options can be considered depending on the project. For our clients in Montreal , Longueuil , and the Montérégie region, this represents significant peace of mind, especially in high-value, multi-zone installations.
Why choose AirGreen for this system?
Choosing AirGreen means relying on a team of certified refrigeration technicians who understand local realities: electrical standards, architectural constraints, acoustic requirements, and Quebec's climate. Our transparent pricing , $5 million liability insurance coverage, and field experience make all the difference between a theoretical installation and a system that truly performs well every day.
Conclusion
The LG Multi F MAX LGRED R32 | 5 Heads + 36,000 BTU heat pump is an advanced HVAC solution for multi-zone projects in the Montérégie , Montreal , Laval , South Shore , and North Shore regions . Its flexibility, heating stability, and precise cooling capabilities make it a relevant choice for demanding buildings.
For an HVAC system tailored to your project, a detailed load analysis, or a personalized estimate, contact AirGreen directly. Our team will be happy to assist you with concrete, sustainable solutions perfectly suited to your needs.
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 6 on this outdoor unit. This product is configured for 5 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.