LG THERMA V R32 Split

LG THERMA V R32 Split is a current air-to-water heat-pump family in which refrigerant pipes connect the outdoor unit to indoor hydro or combi equipment.

Specifications

Specification	Value
Type	air-source, split air-to-water
Supply phases	single
Rated output (kW)	4, 6, 5.5 for marketed 5 kW model, 7 or 9
Rated-output conditions	7°C outdoor air and 35°C leaving water
SCOP (seasonal coefficient of performance) at 35°C	4.65 for the listed 4, 6, 5, 7 and 9 kW variants
SCOP at 55°C	3.23 for the listed 4, 6, 5, 7 and 9 kW variants
Maximum flow temperature (°C)	55 for 4 and 6 kW; 65 for 5, 7 and 9 kW
Heating-water temperature range (°C)	15 to 55 with HN0613M NK5; 15 to 65 with HN091MR NK5
Domestic-hot-water temperature range (°C)	15 to 80; 50 to 80 requires the booster heater with HN0613M NK5, while 55 to 80 requires it with HN091MR NK5
Minimum operating temperature (°C)	-20 for 4 and 6 kW; -25 for 5, 7 and 9 kW
Refrigerant	R32, with published global-warming potential of 675
Sound power (dB)	outdoor unit rated 57 and 58 for 4 and 6 kW; 60 for 5, 7 and 9 kW
Sound pressure at stated distance (dB)	outdoor unit rated 35 and 36 at 5 m for 4 and 6 kW; 38 for 5, 7 and 9 kW, based on catalogue conversion assumptions
MCS certified	current on 23 July 2026: HU041MR U20 / HN0613M NK5; HU061MR U20 / HN0613M NK5; HU051MR U44 / HN091MR NK5; HU071MR U44 / HN091MR NK5; HU091MR U44 / HN091MR NK5. Expired on 7 December 2023: HU051MR U44 / HN0916M NK4; HU071MR U44 / HN0916M NK4; HU091MR U44 / HN0916M NK4
Warranty (years)	1 without required commissioning paperwork; 3 with commissioning sheet and system diagram; up to 7 with additional documents, biannual servicing and other terms; a separate current table says 3 basic and 7 extended
Refrigerant-pipe length (m)	30 maximum for 4 and 6 kW; 50 maximum for 5, 7 and 9 kW

A complete R32 Split product identity combines an HU outdoor code with compatible indoor equipment. LG’s catalogue includes hydro and combi arrangements, while the MCS evidence recorded here is limited to the exact hydro-unit pairings in the specification.

Two capacity groups

The range divides into a 4 kW and 6 kW pair and a separate 5 kW, 7 kW and 9 kW group. The groups have different pipe-length, outdoor-temperature and water-temperature boundaries.

The marketed 5 kW product also has a higher value in the catalogue’s rated-output row at the specified test point. A design record therefore needs the HU outdoor code and its paired indoor code, not only the marketed capacity.

All five variants use a single-phase supply. Their identical published seasonal figures do not make the hardware interchangeable, because their point outputs, sound declarations and operating envelopes differ.

Hydro and combi indoor units

The wall-mounted hydro unit contains the water-side components while leaving domestic-hot-water storage separate. The floor-standing combi unit integrates a cylinder and hydronic equipment. That catalogue choice is part of the system design, but it does not extend the MCS status of the exact hydro pairings to a combi unit.

LG’s UK page describes ThinQ app control with the required Wi-Fi modem. Refrigerant pipe length varies between the two capacity groups and remains an installation-design limit rather than a target distance.

Split pairing lifecycle and warranty

The MCS Product Directory contained the exact current hydro combinations shown in the specification and retained the earlier expired pairings. The complete outdoor and indoor-unit pair identifies the lifecycle record.

LG’s warranty periods depend on the commissioning documents submitted for the installation and continued biannual servicing under the stated terms. The current warranty page contains a separate, conflicting summary, so the installation record and applicable terms determine cover.

Manufacturer and reference sources

Brand

Reference type

Heat-pump or fixed-AC model

Last reviewed

23 Jul 2026

Current status

Current in the manufacturer's UK range.