LG MULTI F R32 Dual Zone Heat Pump | 36000 BTU Compressor

A high-end, multi-zone solution for two spaces, designed for the Greater Montreal climate.

When a home needs to be heated and cooled consistently in two distinct zones (ground floor + upper floor, front wing + rear wing, main residence + intergenerational living space, etc.), the real challenge isn't simply "having a certain number of BTUs." The challenge lies in achieving stable distribution , precise control by zone , and performance that remains reliable when conditions change: heat waves, high humidity, cool nights, thaws, and the dry cold of January.

The LG MULTI F R32 36,000 BTU DoubleZone heat pump , with its KUMXB361A outdoor unit, aims for exactly this balance: a multi-zone base capable of managing two indoor units (and able to expand to more zones depending on the installation), variable speed operation, and technical parameters that really matter for houses and plexes in Montreal , Laval , Longueuil , as well as for properties on the North Shore and South Shore .

At AirGreen , we very often see the same reality in the field: a house that feels like two separate zones, but is treated as if everything were uniform. The result: the upper floor is uncomfortable in the summer, the ground floor is uneven in the winter, and the homeowner spends all their time fiddling with the settings. A well-designed DualZone aims for the opposite: simple controls, consistent comfort, and a feeling of stability that is noticeable every day.

Key elements of the model (what you need to remember)

• Cooling capacity: 36,000 BTU

• 2-zone system (Double Zone) , with the possibility of evolving towards a larger multi-zone architecture depending on the configuration

• R-32 refrigerant, for a more modern approach in terms of efficiency and environmental impact

• Wi-Fi included (depending on the control configuration/compatibility of the indoor units)

• ENERGY STAR®: Yes (according to product information)

• LogisVert provincial subsidy: $1050 (subject to eligibility and application details, to be validated in the file)

These are useful guidelines, but the key lies in the design: which interior units , where to place them, how to manage line lengths, and how to balance the actual needs of the rooms.

What we aim for with a DualZone: stable comfort, real control, measurable efficiency

A multi-zone heat pump is not a “comfort gadget”. When it is properly sized and installed, it becomes a very logical thermal management tool: each zone receives the capacity and airflow strategy it actually needs.

How does a multi-zone system behave on a daily basis (simple and useful explanation)?

In a typical house in Greater Montreal, the thermal loads are not equal:

• Floors : more accumulated heat, often more glazing, sometimes closed bedrooms.

• Ground floor : exterior doors, corridors, kitchen, faster variations.

• Rooms facing south/west : intense solar gain in the afternoon during summer.

• Basement : inertia, humidity, different needs.

With an LG MULTI F DualZone system , the outdoor unit acts as a "distribution center." It adapts its operation to the demands of the two indoor units. This allows for better management of:

• Rapid variations (kitchen, open area, direct sunlight)

• Stable needs (rooms, offices)

• The sensation of air currents (more controlled blowing)

• The consistency between two floors, especially in duplexes and houses with central staircases

The goal is not to have “stronger”, but to have more just .

36,000 BTU: when it's an excellent choice… and when caution is advised

A 36,000 BTU Dual Zone unit becomes relevant in several scenarios common to our customers:

• Duplex, triplex, renovated house with extension

• Open plan + glass-roofed upper floor

• Older dwelling (variable insulation) where robust capacity is desired

• We need reliable air conditioning in the summer, without losing the logic of heating in the shoulder seasons.

However, we always emphasize one point: nominal power alone is not enough. The success of a multi-zone system depends on the capacity distribution between the two indoor units and the room usage strategy.

The most common mistake: “using two heads because you can”

We still see installations where two indoor units have been chosen “at random” (or simply based on availability), without analysis:

• The actual volume of the rooms

• Orientation and the sun

• The rooms that are closed at night

• Lifestyle (teleworking, active cooking, presence of pets, etc.)

The result: one area is working too hard, the other not hard enough, and the system becomes frustrating.

At AirGreen , we avoid this trap by starting with the building, not the catalogue.

The true heart of the project: choosing and balancing the indoor units

Your product page lists several possible interior models (depending on size and series). For a DoubleZone project, this list is not a "menu." It's a set of tools, and the correct installation depends on the specific building.

How we select indoor units (field method)

1. Load analysis (simplified but rigorous)

   • surface areas, ceiling height, insulation, infiltration, orientation

2. Understanding the usage

   • Closed rooms, remote work, kitchen, schedules, seasonal needs

3. Choice of air strategy

   • Avoid direct airflow, promote natural air circulation, and limit dead zones.

4. Installation constraints

   • routing of lines, drainage, access, aesthetics, local regulations

5. Settings and commissioning

   • ventilation speed, louvers, settings, modes, multi-zone optimization

Real-life example (Montreal): renovated duplex, upper floor too hot

In a renovated duplex, the upstairs overheated in the summer, while the downstairs remained more stable. A "one large unit in the center" approach would have created a permanent compromise. With DoubleZone, the upstairs received a dedicated indoor unit, and the downstairs a second, with a distribution strategy that avoids uncomfortable air jets. The most striking result wasn't a number: it was the disappearance of the reflex to constantly adjust the settings. When people stop adjusting, it's because they're comfortable.

Real-life example (Laval): bungalow extended, new section difficult to balance

In an extended bungalow, the new section (often with more windows) became uncomfortable. With a DoubleZone system, the main section and the extension were treated as two separate zones. This allowed for control of the extension without affecting the entire house, and maintained a simple and stable temperature control system.

Multi-zone installation: the details that make the difference in Montreal, Laval, Longueuil

A multi-zone heat pump can be efficient, but it must be installed with a coherent approach. Here are the key points that make all the difference, especially in buildings in Greater Montreal.

1) The location of the outdoor unit: noise, clearances, durability

Outdoor unit in the courtyard, on a wall bracket, on a slab, on a structure… the choice is never neutral. We analyze:

• Risk of resonance (corner between two walls, enclosed balcony, alcove)

• Clearances for air circulation and service access

• Snow/ice accumulation and drainage management

• Protection against splashes (salt, ice, packed snow)

Even with a technically well-designed machine, a poorly chosen location can create unnecessary complaints: vibration, structural noise, difficult access for service.

2) Refrigerated circuit: aesthetics and performance

Multi-zone systems involve refrigeration lines and condensate drainage. We pay attention to:

• Clean and watertight perforations

• Discreet and durable pipe cover

• Protection against UV rays and mechanical stress

• Reliable slope and drainage to prevent backflow or damage

In Montreal's apartment buildings or Longueuil's townhouses, the discreetness of the installation is often just as important as performance. A clean installation protects your investment and your facade.

3) Electrical: compliance, stability, safety

For 220V systems, it's essential to check the panel's capacity and ensure adequate protection, and avoid "quick fixes" that end up being expensive. We confirm:

• Driver caliber

• Circuit breaker and protection

• External disconnection compliant

• Grounding

A serious HVAC installation is not only seen by the result: it is seen by the respect for electrical logic.

4) Winter management: defrosting, drainage, perceived comfort

Defrosting is normal in heating systems. What makes the difference is:

• The way in which the air is blown during these phases

• The stability of the instructions and ventilation

• Water and ice management outdoors

• The location avoids creating an “ice rink” in front of a passageway

We explain these realities to our customers from the outset, because a well-informed customer better understands the normal behavior of a heat pump and gets more out of their system.

Real efficiency: what influences your bill (beyond the numbers)

Efficiency indices (SEER2, HSPF2, COP at certain temperatures) provide benchmarks, but in practice, savings mainly come from the following combination:

• Consistent sizing (neither too small nor too large)

• Intelligent modulation (better stability, fewer short cycles)

• Adjusted settings (ventilation, shutters, modes)

• Minimal but regular maintenance

• Usage habits (reasonable instructions, stable settings)

What we often observe among owners

When a multi-zone system is well designed:

• People are keeping to stable guidelines

• The rooms are more uniform.

• We experience fewer "peaks" of hot/cold

• The house is more comfortable in the shoulder seasons, when poorly sized systems become irritating.

Wi-Fi and control: useful when used correctly

Wi-Fi control (depending on configuration) is useful for:

• Adapt instructions according to the schedule (teleworking, children, absences)

• Follow habits and avoid extreme settings

• Adjust one area without disturbing the other

However, we recommend a simple approach: smart controls are useless if the basic design is poor. Wi-Fi should be an enhancement , not a crutch.

Maintenance and service: what we recommend to maintain performance

To maintain consistent performance in Montreal , Laval , Longueuil , and in the windier areas of the North Shore or the more humid areas of the South Shore , we recommend:

Maintenance on the indoor unit side

• Filter cleaning (frequency depending on usage, dust, animals)

• Checking the drain and flow

• Visual inspection of the heat exchangers (dust, obstruction)

• Checking for abnormal noise (vibration, fan wheel)

Maintenance on the outdoor unit side

• Snow and debris removal

• Checking the stability of the support and the anti-vibration devices

• Visual inspection of the fins and the coil

• Gentle cleaning when necessary (without damaging the fins)

A concept often overlooked: perceived performance

A system can "work" and yet be less comfortable. The service isn't just about repairs; it's about maintaining a high level of comfort : airflow, stability, and consistency between zones.

Common mistakes we correct (and how to avoid them)

Here's what we see most often during assessments or takeovers:

• Poorly positioned indoor units : blows directly onto a resting area → discomfort, complaints of drafts.

• Undersized critical zone : glazed floor or sunny room → discomfort and overuse of the second zone.

• Improvised line layout : visually cumbersome installation, difficult maintenance, risk of drainage problems.

• Inadequate external support : vibration, structural noise, instability in winter.

• Inconsistent settings : speeds too high, extreme instructions, flaps incorrectly oriented.

Our rule of thumb: a successful multi-zone installation is a combination of design , execution , and commissioning . That's where the difference lies between "it works" and "it's comfortable."

Why choose AirGreen for an LG Multi F Dual Zone 36,000 BTU

A DualZone heat pump is an investment that must be protected by a rigorous approach. At AirGreen , our added value is simple and concrete:

• On-site assessment to validate the actual constraints (building, layout, aesthetics, noise)

• Clear final offer before work begins (transparent pricing, no surprises)

• Clean installation designed for durability (fixings, pipe covers, drainage, electrical)

• Complete commissioning (settings, explanations, zone optimization)

• Excellent support (service, documentation, usage tips)

This model, LG MULTI F R32 36,000 BTU Dual Zone Heat Pump – KUMXB361A , is a very relevant option for houses and plexes where real comfort is desired in two separate zones, without multiplying outdoor equipment, and while maintaining a simple control logic.

For what type of property is this model often ideal?

• Duplex / triplex (naturally separated zones)

• Two-story house (significant temperature difference between levels)

• Bungalow extended (new section difficult to balance)

• Two-level condo (mezzanine bedroom, open concept)

• House with lots of windows (variable charges)

In all these cases, multi-zone becomes a tool for comfort and energy management, provided that the installation is adapted to the reality of the building.

Do you want an accurate estimate and a proposal tailored to your property in Montreal, Laval, Longueuil, on the North Shore or the South Shore?
Contact AirGreen for an assessment and quote: we will propose a coherent DoubleZone configuration (capacity distribution, unit location, line routing, installation details) to achieve stable and lasting comfort.