LG · Model MU3R19.U23
MU3R19 (Multi F, 3-room outdoor unit)
LG's compact three-port Multi F outdoor unit reaches the top A+++ cooling class, running up to three indoor units efficiently across a smaller flat or house.
€1,300
List priceoutdoor unit only; indoor units and install extra
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Units like this are usually quoted and fitted by a specialist installer. Compare it against models you can buy today.
Sizing this system
This is a whole-home system: its rated cooling is shared across several indoor units or distributed through ductwork, so there is no single room it does or does not fit. An installer sizes each zone against that room (a Manual J calculation), which is why we do not print a room verdict here.
Installation cost
$5,000-15,000 fully installed depending on the number of zones (roughly $3,000-8,000+ for the multi-zone install on top of the equipment). A 2-room (2x1) setup sits near the lower end, a 4-5 room whole-home system near the top. The unit price you see here is hardware only; installation is the larger, separate cost.
A typical range for this system type, for comparison only, not a quote for this unit. The actual price depends on the line-set run, electrical work and access.
At a glance
Best for energy-conscious owners of a smaller two or three room home wanting top efficiency.
Performance
- Cooling capacity
- 5.3 kW · 18,000 BTU
- Heating capacity
- 6.3 kW
- Total coverage
- 40–65 m²
- SEER (cooling)
- 8.6
- SCOP (heating)
- 4.65
- Energy class (cooling)
- A+++
- Energy class (heating)
- A+
- Annual energy (cooling)
- 217 kWh
Noise, size & features
- Model number
- MU3R19.U23
- Indoor noise
- 19 dB(A)quieter than a whisper
- Outdoor noise
- 47 dB(A)
- Indoor unit
- varies by chosen indoor units (e.g. DualCool wall unit 837x308x189 mm)
- Outdoor unit
- 650x870x330 mm (HxWxD)
- Refrigerant
- R32
- Wi-Fi / app
- Yes
- Outdoor unit needed
- Yes
What is good
- Top A+++ cooling class with very low 217 kWh annual cooling energy use
- Compact, lightweight outdoor unit (around 44 kg) and quiet 47 dB(A)
- ThinQ Wi-Fi control and UVnano on many compatible indoor units
- Runs up to 3 indoor units from one efficient condenser
What to watch
- 5.3 kW total is best for smaller homes, not large open-plan spaces
- Three-port limit, so no fourth or fifth room
- Maximum heating output is modest for very cold climates
Installation & the rules that apply
This is a multi-split. Same F-gas certified-installer requirement and sub-750 GWP refrigerant rule as a single split, applied across a bigger system. Because it touches multiple rooms and routes pipes through the structure, it more often triggers planning or prior-declaration steps, freeholder, landlord or condominium and shared-wall consent, and neighbour distance and noise rules. Heritage and historic-centre restrictions apply to the outdoor unit just as for a single split, but the single shared condenser is often easier to get approved than several separate units.
Certified installer
R32
Common questions about the LG MU3R19 (Multi F, 3-room outdoor unit)
- How loud is the LG MU3R19 (Multi F, 3-room outdoor unit)?
- 19 dB(A) indoors, quieter than a whisper.
- How energy-efficient is the LG MU3R19 (Multi F, 3-room outdoor unit)?
- Its efficiency rating is SEER 8.6.
- Do I need a professional to install the LG MU3R19 (Multi F, 3-room outdoor unit)?
- Yes. As a multi-split it needs a certified installer. Usually needs permission.
- Does the LG MU3R19 (Multi F, 3-room outdoor unit) heat as well as cool?
- Yes. It also heats, rated 6.3 kW of heating output.
More multi-split units around 5.3 kW
Mitsubishi Electric
MXZ-2F53VF5 (2-room multi-split outdoor unit)
The Mitsubishi Electric MXZ-2F53VF5 is a 5.3 kW two-zone multi-split outdoor unit (A+++ cooling) that runs two indoor units quietly from a single compact condenser.
€1,279
Hardware price
Hitachi
RAM-G55N3HAE airHome Multi Pro
The Hitachi RAM-G55N3HAE airHome Multi Pro is a 5.5 kW R32 tri-split outdoor unit with class-leading A+++ cooling efficiency. One condenser drives up to three indoor heads, making it a tidy solution for a three-room flat or a home office plus two bedrooms.
€1,500
Hardware price
