LG Multi F LGRED R32 Heat Pump | 2 Indoor Units - 1 Compressor 18000 BTU
The LG Multi F LGRED R32 18 000 multi-zone heat pump heats and cools 2 rooms with a single outdoor unit. it delivers 13,900 BTU/h at −8 °C, heats down to −25 °C and qualifies for a $1,668 LogisVert grant. Installed by AirGreen in Montréal, Laval, Longueuil, the North Shore and the South Shore.
2 rooms, one outdoor unit.
Compared with the 48 multi-zone systems of 18,000 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 2 heads and modulates from 10,248 to 23,600 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 110 % 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 48 multi-zone systems of 18,000 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 residential realities of Quebec
At AirGreen , we have been installing multi-zone systems for many years in a wide variety of settings: duplexes in Montreal , single-family homes in Laval , new condos in Longueuil , multigenerational properties on the North Shore , and renovated residences on the South Shore . The LG Multi F LGRED R32 dual-zone 18,000 BTU heat pump is one of the configurations we recommend when a single outdoor compressor needs to supply two separate spaces with different heating requirements, while maintaining a clean, efficient, and durable installation.
This type of system addresses a common problem: how to heat and cool two rooms without increasing the number of outdoor units, compromising the building's aesthetics, or unnecessarily oversizing the equipment. LG's Multi F provides a practical solution to these constraints, particularly in dense urban environments.
Understanding the logic of a Multi F system with two indoor units
A multi-zone system operates on a simple principle: a single outdoor compressor powers two independent indoor units . Each unit has its own control, sensors, and power modulation. In the case of the LG Multi F LGRED R32 , the total nominal capacity of 18,000 BTU is intelligently distributed according to the actual demand of each zone.
In practical terms, this means:
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A north-facing bedroom may require heating while a sunnier living room remains stable.
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A room used full-time can receive more power than a secondary space.
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Power consumption adjusts continuously, without abrupt cycles.
During our installations in Montreal and Laval , this type of configuration is often chosen for homes where you want to air condition a living room and a bedroom, or a ground floor and an office, without multiplying the equipment visible outside.
Choosing R-32 refrigerant: efficiency and environmental compliance
R-32 gas represents a major advancement in residential HVAC . Compared to older refrigerants, it offers:
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A reduced global warming potential , in line with current regulatory guidelines.
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Improved heat transfer capacity, which enhances actual heating and cooling efficiency.
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A lower refrigerant charge for equivalent performance.
In our projects on the South Shore and in Montérégie , this criterion is increasingly important for clients who want to invest in a sustainable solution, compatible with future standards, and eligible for the LogisVert provincial subsidy programs when applicable.
Performance in winter heating: a priority at AirGreen
In Quebec, heating capacity in cold weather is never an afterthought. The LG Multi F LGRED R32 heat pump is designed to maintain stable heat output even in very low temperatures, making it a relevant choice as a primary or supplementary heating system.
On site, our refrigeration technicians observe:
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A gradual temperature increase, without excessive drying of the air.
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Appreciable thermal stability in remote rooms.
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A significant reduction in the use of electric baseboard heaters.
In several installations carried out in Longueuil and on the North Shore , this type of system has made it possible to significantly reduce the annual energy bill, while improving perceived comfort, particularly in rooms that were previously difficult to heat.
Flexibility of indoor units: a real advantage in renovation
One of the strengths of the LG Multi F lies in its compatibility with several models of indoor units . This flexibility is particularly useful in renovation projects, where architectural constraints vary from room to room.
At AirGreen , we adapt the choice of units according to:
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The actual area of each zone.
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Ceiling height.
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Orientation and sunlight.
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The desired sound level.
In a condo in Montreal East , for example, we installed a more compact and very quiet unit in one bedroom, and a higher airflow unit in the main living area. This customized approach is at the heart of our HVAC installation method.
Noise levels and acoustic comfort
Comfort isn't just about temperature. Noise level is a crucial factor, especially in urban living. Indoor units compatible with this system are designed to operate at low sound pressure levels, making them suitable for bedrooms, home offices, and relaxation areas.
During our interventions in Laval and Boucherville , several clients mentioned to us that the discreet operation of the system had a direct impact on sleep quality and concentration at work.
HVAC installation: the importance of sizing and installation
A poorly sized or installed multi-zone system quickly loses its advantages. At AirGreen , every project begins with a precise analysis:
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Calculation of thermal load per zone.
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Verification of the length of the refrigeration lines.
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Power supply validation (220 V, MCA, MOP).
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Choosing the optimal location for the outdoor compressor.
During rework carried out by other contractors, we observed that the most frequent errors concerned power distribution between zones and de-icing management in winter. Our approach aims to avoid these problems from the project design stage.
HVAC maintenance and long-term durability
A well-maintained LG Multi F LGRED R32 system retains its performance for many years. We recommend:
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An annual HVAC service including filter cleaning, pressure checks and electrical inspection.
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Periodic monitoring of condensate drainage.
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A check of heating efficiency before the winter season.
In our customer follow-ups in Montreal and on the South Shore , regular maintenance helps to maintain stable operation and significantly reduce the risk of breakdowns during peak periods.
Why entrust this project to AirGreen?
Choosing AirGreen means benefiting from:
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With proven field expertise in LG multi-zone systems.
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Certified refrigeration technicians accustomed to the climatic realities of Quebec.
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A transparent approach, with recommendations tailored to each building.
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Clear support for LogisVert subsidies , when applicable.
We never offer a standardized system without taking into account the specific characteristics of the home. Each installation is designed to be coherent, durable, and truly useful on a daily basis.
A coherent investment for two very distinct areas
The LG Multi F LGRED R32 heat pump – 2 indoor units, 1 compressor, 18,000 BTU – represents a balanced solution for homeowners who want to optimize their comfort without adding to their outdoor infrastructure. In residential settings in Montreal , Laval , Longueuil , the North Shore , and the South Shore , this type of configuration offers a smart compromise between performance, quiet operation, and energy efficiency.
Take action with AirGreen
To obtain a detailed quote , confirm the compatibility of this system with your home, or discuss your HVAC installation project, contact AirGreen directly. Our team will take the time to analyze your situation and offer you a truly tailored solution.
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: 13,900 BTU/h at −8 °C, 19,800 at −15 °C.
How many heads can I connect?
Up to 2 on this outdoor unit. This product is configured for 2 heads.
How much is the LogisVert grant?
$1,668 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 3553132. 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, 54 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.