LG

LG MULTI F DoubleZone heat pump | 18,000 BTU Compressor | Montreal, Laval, Longueuil, South Shore and North Shore

In stock
SKU: LMU180HV-99
18,000BTU/h · 2 heads
−20 °Cheats down to
Wi-Fi includedR-410AUp to 2 heads
Areas
Talk to a technician · 514 316-2973
Outdoor unit LMU180HV*Possible indoor models LMN079HVT, LSN090HSV5, LSN120HSV5AHRI 206221543
In short

The LG Multi F 18 000 multi-zone heat pump heats and cools 2 rooms with a single outdoor unit. it delivers 20,200 BTU/h at −8 °C, heats down to −20 °C. Installed by AirGreen in Montréal, Laval, Longueuil, the North Shore and the South Shore.

01 · The verdict in 10 seconds

2 rooms, one outdoor unit, and the most powerful in its class at −8 °C.

Compared with the 48 multi-zone systems of 18,000 BTU we sell. Figures come from the manufacturer’s data and the AHRI certification.

AHRI 206221543
+20,200 BTU/h at −8 °CRank 1 of 45. Class median: 15,000 BTU/h.
+HSPF2 11.0Rank 1 (tied) of 46. Class median: 10.0.
+Only 54 dB(A) outdoorsRank 7 (tied) of 48. Class median: 56 dB(A).
!Good to know: heats down to −20 °CRank 38 of 48; class median: −25.5 °C.
20,200BTU/h at −8 °C
−20 °Cstill heating
2heads
02 · The machine

The parts that make a multi-zone system.

Tap a part to learn more.

LMU180HV*

Outdoor unit

One compressor for the whole house. It supplies up to 2 heads.

03 · How it works

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.

04 · My plan

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.

05 · The series

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.

Outdoor2 zones3 zones4 zones5 zones6 zones7 zones8 zones
18,000BTU
Here
24,000BTU
23
30,000BTU
234
36,000BTU
234
48,000BTU
2345678
60,000BTU
2345678

LG Multi F 18 000 · 2 zones

20,200 BTU/h
at −8 °C

Up to 2 heads on this outdoor unit. Tap another box to see that size.

06 · Deep cold

At −15 °C, it still delivers 98 % of its rated capacity.

Tap a temperature: capacity, efficiency and the cost of one hour of heating.

07 · The bill

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.

08 · Efficiency

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.

SEER2 · seasonal cooling22.5
Scale 1 – 30Median: 22
Rank 16 (tied) of 47 in its class.
HSPF2 · seasonal heating11.0
Scale 1 – 15Median: 10
Rank 1 (tied) of 46 in its class.
EER2 · cooling in peak heat13.5
Scale 1 – 20Median: 12.5
Rank 9 (tied) of 45 in its class.
09 · Report card

Where it ranks among same-size multi-zone systems.

Compared with the 48 multi-zone systems of 18,000 BTU we sell. Weaknesses too, said plainly.

10 · Head-to-head

Against three other brands in its class.

Same rated size, other manufacturers. Pick the opponent.

11 · Multi-zone or wall units

One multi-zone or several wall units? Both sides, honestly.

This multi-zone2 wall units
On the wall1 outdoor unit2 outdoor units
Electrical1 dedicated circuitOne circuit per unit
CapacityShared between roomsReserved for each room
If the outdoor unit stopsEvery zone stopsOnly one room
ModesSame mode everywhereEach room chooses
LogisVertPer the listDepends on each model

We compare both options on your floor plan during the estimate.

12 · Installation

What to know before installing a multi-zone system.

Dimensions, wiring and lines, drawn. Then our six steps.

The outdoor unit, dimensioned

25.3 in
LMU180HV*Depth 15.2 in
36.1 in
Dimensions: product sheet (W × D × H).

One circuit for the whole house

Electrical panel
Load calculation before the quote
20 A max. breaker
MCA 16 A · 220 V
Outdoor unit
Head 1
Head 2
Our RBQ licence covers electrical work (subclass 16).
01Room-by-room visit and surveyWe measure each zone and note insulation and windows. The on-site estimate is free.
02Heads and line layoutOne pair of lines per head.
03Outdoor unit baseAbove the snow line, away from the neighbours’ bedroom windows.
04Exposed, finished linesLines 1/4 - 3/8 in under line covers, no work inside the walls.
05Dedicated circuit220 V, MCA 16 A, 20 A protection. The panel load calculation is done before the quote.
06Commissioning, zone by zoneEach head is tested and the controls set up.
13 · Sound

Published sound levels, on one scale.

We use the outdoor figure to choose where the unit goes.

29
38
54
27
56
20 dB(A)3040506070
29 Reference head, lowest speed38 Reference head, highest speed27 Class indoor median54 Outdoor unit56 Class outdoor median
Values in dB(A). Indoor values are those of the sheet’s reference head; each head has its own, confirmed for the chosen model. Municipal noise by-laws vary by borough.
14 · Specifications

Every number, and where it comes from.

Each line carries its source; a line with no published value is not shown.

Performance
Cooling capacity (size)18,000 BTU · 1,5 tonsSheet
SEER2 (seasonal cooling efficiency)22.5AHRI
EER2 (instant cooling efficiency)13.5AHRI
HSPF2 (seasonal heating efficiency, region IV)11.0AHRI
Dehumidification2.3 pints/hSheet
Heating
Capacity at −8 °C20,200 BTU/hSheet
Capacity at −15 °C17,700 BTU/hSheet
Heats down to−20 °CSheet
Zones and heads
Zones on this product2 Zones (Dual Zone)Sheet
Maximum zones2 Zones (Dual Zone)Sheet
Possible indoor modelsLMN079HVT, LSN090HSV5, LSN120HSV5Sheet
Combinations offered3 · 9 + 9 … 12 + 12Sheet
Indoor dimensions (W × D × H)32.94 × 7.44 × 12.13 inSheet
Vertical louversManualSheet
Horizontal louversAutoSheet
Airflow (reference head)282 CFMSheet
Indoor sound (reference head)29 – 38 dB(A)Sheet
Installation
Outdoor unit (W × D × H)36.1 x 15.2 x 25.3 inSheet
Line sizes1/4 - 3/8 inSheet
Outdoor sound54 dB(A)Sheet
Electrical
Voltage220 VSheet
MCA (minimum circuit ampacity)16 ASheet
MOP (maximum overcurrent protection)20 ASheet
RefrigerantR-410ASheet
Wi-FiIncludedSheet
Certifications and warranty
AHRI206221543AHRI
Warranty (compressor · parts · labour)10 yrs · 10 yrs · 0 yrsSheet
AirGreen extended warrantyPossibleSheet
15 · Official brochures

The manufacturer’s documentation, as PDF.

16 · Description

Everything we have written about this system.

LG MULTI F DoubleZone Heat Pump | 18,000 BTU Compressor | Montreal, Laval, Longueuil, South Shore, and North Shore

Introduction to the Double Zone Heat Pump

In the vast world of residential heating and cooling solutions, the LG MULTI F DoubleZone Heat Pump stands out for its efficiency, versatility, and advanced technology. Designed to meet the specific needs of homes in Montreal, Laval, Longueuil, as well as the South Shore and North Shore, this wall-mounted 2-zone heat pump is a true revolution in the realm of home comfort.

Main Features

The LG MULTI F DoubleZone Heat Pump boasts an impressive cooling capacity of 18,000 BTU, paired with an effective heating capability down to -20°C, making it the perfect ally against Canada's harsh winters and hot summers. Its innovative design allows for a discreet and elegant installation, seamlessly integrating into the aesthetic of any home.

Modulable Comfort Zones

One of the most remarkable features of this heat pump is its ability to manage two distinct comfort zones, thus allowing for the customization of the indoor climate according to individual preferences. Whether in bedrooms, living rooms, or kitchens, each space can benefit from independent settings, ensuring an ideal atmosphere at all times and in every place.

Advanced Technology and Features

Equipped with a variable speed compressor inverter, the LG MULTI F DoubleZone Heat Pump automatically adjusts its power according to needs, thereby optimizing its energy consumption and efficiency. Features such as automatic defrosting, delayed restart, and automatic diagnosis highlight the intelligence of this device, designed to offer a hassle-free user experience.

Energy Performance and Subsidies

Despite the lack of Energy Star® certification, this heat pump stands out for its exceptional 22.5 SEER performance, synonymous with substantial savings on energy bills. Moreover, homeowners can benefit from attractive federal and provincial subsidies, making the investment in the LG MULTI F DoubleZone Heat Pump even more advantageous.

Professional Installation and Warranty

AirGreen, with its expertise in the HVAC field in Montreal and surrounding areas, ensures professional installation that complies with the strictest standards. With an extended warranty on the compressor, parts, and labor, our clients enjoy unmatched peace of mind, knowing their investment is protected for many years.

Conclusion: A Wise Choice for Uncompromised Comfort

Choosing the LG MULTI F DoubleZone Heat Pump is the wise choice for anyone looking for a modulable, efficient, and durable heating and cooling solution. AirGreen is committed to providing top-tier installation and maintenance services, thus ensuring that every home in Montreal, Laval, Longueuil, on the South Shore, and the North Shore enjoys ultimate comfort all year round.

17 · Questions

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: 20,200 BTU/h at −8 °C, 17,700 at −15 °C.

How many heads can I connect?

Up to 2 on this outdoor unit. This product is configured for 2 heads.

Can I mix head sizes?

Yes. The “Zones” menu offers 3 combinations, from 9 + 9 to 12 + 12 (in thousands of BTU). Each head is sized for its room.

Down to what temperature does it heat?

Down to −20 °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; labour is not included by the manufacturer. AirGreen extended warranty: possible.

AirGreen

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.

RBQ 5645-9605-01Ventilation 15.8, refrigeration 15.10, electrical 16
We handle the circuitOur licence covers the electrical work
Beware of scamsHydro-Québec does no phone or door-to-door solicitation for LogisVert
Sources checked on October 1, 2026.Costs: Hydro-Québec Rate D, 11.142 ¢/kWh (second tier, since 1 April 2026). Amounts shown are estimates; only the responsible bodies confirm the grant awarded.