Samsung EHS Gen6 Mono R32 16kW 1-Phase Air-to-Water Outdoor Heat Pump AE160RXYDEG/EU
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Samsung EHS Gen6 Mono R32 16kW 1-Phase Air-to-Water Outdoor Heat Pump AE160RXYDEG/EU

Samsung EHS Gen6 Mono R32 16kW 1-Phase Air-to-Water Outdoor Heat Pump AE160RXYDEG/EU

$1,806.72

Original: $5,162.06

-65%
Samsung EHS Gen6 Mono R32 16kW 1-Phase Air-to-Water Outdoor Heat Pump AE160RXYDEG/EU—

$5,162.06

$1,806.72

The Story

The Samsung EHS Mono Gen6 is a fully-contained monoblock air-to-water heat pump in which the complete refrigerant circuit — inverter-driven BLDC twin-rotary compressor, plate heat exchanger, and electronic expansion valve — is housed entirely within the outdoor unit. Only insulated water pipes run indoors, eliminating any requirement for F-Gas work on the indoor side and simplifying compliance with Building Regulations. The AE160RXYDEG/EU delivers a rated heating capacity of 16 kW at standard A7/W35 test conditions, achieving a Seasonal COP (SCOP) of 4.48 at LWT 35°C — ErP class A+++ — and SCOP 3.53 at LWT 55°C (A++) per EN 14825. This makes it eligible for the UK Boiler Upgrade Scheme (BUS) when installed by an MCS-registered contractor. The unit operates reliably down to −25°C ambient and delivers flow temperatures up to 65°C, serving both low-temperature underfloor heating circuits and existing radiator systems. R32 refrigerant (GWP 675, ODP 0) reduces CO₂-equivalent emissions by 73% compared with R410A systems of equivalent capacity.

16 kW
Rated Heating
Capacity (A7/W35)
SCOP 4.48
ErP A+++
@ LWT 35°C
−25°C
Min Ambient
Operating Temp
65°C
Max Flow
Temperature
52 dB(A)
Sound Pressure
(Heating Mode)
110.0 kg
Net Weight

⚠  Installer & Safety Critical

  • F-Gas regulations apply. R32 is a fluorinated greenhouse gas (GWP 675). All installation, commissioning, and decommissioning work must be carried out by an F-Gas certified engineer. Refrigerant site records must be maintained.
  • No integral pressure relief valve. The outdoor unit does not include a PRV. A compliant pressure relief valve must be installed in the hydraulic circuit in accordance with BS EN 12828 and Building Regulations Part G.
  • MCS registration required for BUS grant. The unit and installation must be registered by an MCS-certified installer before the Boiler Upgrade Scheme grant is submitted.
  • Minimum system water volume: 50 litres. The installer must calculate total hydraulic circuit volume and add a buffer vessel if the minimum cannot be met from pipework and cylinder coil volume alone.

⚠  Compatibility & Advisory

  • Control module not included. The outdoor unit requires the Samsung MIM-E03CN control module (which includes Touch Controller MWR-WW10N) to operate. Order separately or as part of a ClimateHub package.
  • Wi-Fi not embedded. SmartThings App connectivity requires the optional MIM-H04N Wi-Fi Kit (sold separately).
  • Dedicated electrical circuit required: 40 A MCB. This unit draws MCA 32.0 A / MFA 40.0 A. Confirm available supply capacity and cable sizing to MCA before specifying. Note: a 3-phase variant (AE160RXYDGG/EU, 380–415 V) is also available for commercial properties or where a 3-phase supply exists.
  • Filter/strainer mandatory on the return water pipe to protect the outdoor unit heat exchanger from system debris. Clean regularly to maintain minimum flow rate.

ⓘ  Product Highlights

  • MCS Listed — qualifies for the UK Boiler Upgrade Scheme (BUS) £7,500 grant when installed by an MCS-certified contractor.
  • Compatible with the Samsung ClimateHub tank-integrated hydro unit (200 L or 260 L) or third-party cylinders and control kits from various manufacturers.
  • 2-Zone Control supported — optimise a high-temperature radiator zone and a low-temperature underfloor heating zone independently from a single outdoor unit.
  • PV-Enabled & Smart Grid Ready — shifts electrical demand to periods of solar surplus or off-peak grid tariffs to minimise running costs.

Key Features

True Monoblock Architecture

Unlike a split heat pump, the EHS Mono houses the complete refrigerant circuit outdoors. No refrigerant pipework penetrates the building envelope — only insulated water pipes connect the outdoor unit to the indoor hydraulic system. This eliminates F-Gas work on the indoor side, broadens compatibility with third-party cylinders and control kits, and simplifies compliance with Building Regulations Part F.

SCOP 4.48 — ErP A+++ at LWT 35°C

Tested across a full seasonal load profile per EN 14825, this unit achieves SCOP 4.48 at a 35°C leaving water temperature — the ideal operating point for underfloor heating systems. At 55°C flow (for legacy radiator retrofits) the SCOP is 3.53 (A++), still considerably better than a condensing boiler. The inverter-driven compressor modulates continuously to match heat demand, avoiding on/off cycling losses and reducing wear.

−25°C Cold-Climate Performance

The unit maintains full rated output down to −7°C ambient (A−7/W35 peak condition: 14.6 kW) and continues to operate down to −25°C through compressor modulation and supplementary backup heating. Domestic hot water mode remains available down to −25°C, covering the entire range of UK winter conditions with confidence.

Up to 65°C Flow Temperature

A maximum leaving water temperature of 65°C allows this unit to serve legacy radiator systems without mandatory full system re-sizing, provided heat-loss calculations confirm adequate emitter output at the specified flow temperature. For maximum efficiency, the system is best designed to run at 45–55°C or lower, where the SCOP improvement over boiler operation is most significant.

Anti-Salt Heat Exchanger & Robust Casing

The louvred-fin heat exchanger uses G-Fin geometry with an Anti-Salt coating on fins and tubes to resist corrosion in coastal or industrially polluted environments. The powder-coated electro-galvanised steel casing in Samsung's Earth Brown finish provides additional weathering protection. Two axial-flow fans with BLDC motors (2 × 125 W) deliver 118 m³/min airflow at 750 rpm for high throughput with low electrical draw.

Smart Connectivity & Energy Management

Via the optional MIM-H04N Wi-Fi Kit, the unit integrates with the Samsung SmartThings ecosystem for remote on/off, scheduling, and energy monitoring from iOS or Android. The Touch Controller MWR-WW10N (included with MIM-E03CN) supports 2-Zone temperature scheduling, error monitoring, and summer-mode cooling. Smart Grid Ready and PV-Enabled logic allow demand shifting toward off-peak tariffs or surplus solar generation.

Technical Specifications

Parameter AE160RXYDEG/EU
General
Model Number AE160RXYDEG/EU
Series EHS Mono Gen6
Type Monoblock Air-to-Water Heat Pump (A2W)
Power Supply 1-phase, 220–240 V, 50 Hz
Refrigerant R32 (GWP 675, ODP 0) — fluorinated greenhouse gas
Refrigerant Charge 2.20 kg / 1.49 tCO₂e
Refrigerant Control Electronic Expansion Valve (EEV)
Heating Performance
Rated Heating Capacity (A7/W35) 16 kW
Heating Power Input (A7/W35) 3,620 W
COP (A7/W35) 4.42
Heating Capacity at A2/W35 (2°C ambient) 13.2 kW
Heating Capacity at A−7/W35 (Peak, −7°C) 14.6 kW
PdesignH at LWT 35°C 16.0 kW
PdesignH at LWT 55°C 16.0 kW
Cooling Performance
Rated Cooling Capacity (A7/W35) 14 kW
Cooling Power Input (A7/W35) 3,280 W
EER (A7/W35) 4.27
Seasonal Efficiency (EN 14825)
SCOP at LWT 35°C 4.48 — ErP Class A+++
SCOP at LWT 55°C 3.53 — ErP Class A++
SEER (Cooling) 5.31
Electrical
Current Input — Cooling 15.7 A
Current Input — Heating 17.0 A
Minimum Circuit Ampacity (MCA) 32.0 A
Maximum Fuse Ampacity (MFA) 40.0 A
Hydraulics
Leaving Water Temp — Heating Range 15–65°C
Leaving Water Temp — Cooling Range 5–25°C
Nominal Water Flow Rate (H/C) 46.2 / 40.4 LPM (H/C)
Minimum Water Flow Rate 12.0 LPM
Maximum Water Flow Rate 58.0 LPM
Maximum System Water Pressure 3 bar
Water Pipe Connections BSPP Male 1″ (inlet & outlet)
Minimum System Water Volume 50 litres (buffer vessel recommended if not achieved)
Operating Conditions
Heating Ambient Range −25°C to +35°C
Cooling Ambient Range +10°C to +46°C
Domestic Hot Water Ambient Range −25°C to +43°C
Airside & Heat Exchanger
Air Flow Rate 118 m³/min
Fan Quantity / Type 2 × Axial Propeller, Brushless DC Motor
Fan Motor Output 2 × 125 W
Fan Speed 750 rpm
Fan Discharge Direction Horizontal
Heat Exchanger Fin Type G-Fin Louvred
Heat Exchanger Tube Diameter Φ7.94 mm, 2-row
Fin/Coil Treatment Anti-Salt coating
Acoustics (ISO 3741)
Sound Pressure Level — Heating Mode 52 dB(A)
Sound Power Level — Heating Mode 66 dB(A)
Sound Pressure Level — Cooling Mode 54 dB(A)
Sound Power Level — Cooling Mode 68 dB(A)
Compressor
Compressor Type BLDC Twin Rotary, Inverter Driven
Compressor Oil Type / Initial Charge POE / 1,700 cc
Physical
Net Dimensions (W × H × D) 940 × 1,420 × 330 mm
Net Weight 110.0 kg
Casing Material Powder-coated electro-galvanised steel
Casing Colour Earth Brown
Controls & Connectivity
Control Module (required, sold separately) MIM-E03CN (incl. Touch Controller MWR-WW10N)
Wi-Fi Connectivity Optional — MIM-H04N Wi-Fi Kit (sold separately)
SmartThings App Compatible Yes (requires MIM-H04N)
2-Zone Control Yes
PV-Enabled Yes
Smart Grid Ready Yes

Frequently Asked Questions

▶  Does this unit qualify for the UK Boiler Upgrade Scheme (BUS) grant?
Yes. The AE160RXYDEG/EU is MCS listed and qualifies for the BUS grant (currently £7,500 for air source heat pumps). The installation must be completed by an MCS-certified installer, and the unit must be registered under the scheme before the grant claim is submitted. The installer is responsible for MCS registration and EPC requirements.
▶  Can this heat pump work with my existing radiators as well as underfloor heating?
Yes. The unit can supply flow temperatures up to 65°C, making it capable of driving legacy radiator systems. However, the greatest efficiency — SCOP 4.48 at LWT 35°C — is achieved at lower flow temperatures. Most retrofit projects involve upsizing radiators to allow the system to run at 45–55°C rather than 70–80°C, significantly improving seasonal efficiency and reducing running costs. A heat-loss survey and radiator capacity check by a qualified installer are essential before specifying flow temperatures.
▶  What control module and accessories are required?
The outdoor unit alone is not a complete system. The following are required or recommended:
  • MIM-E03CN Control Module (includes Touch Controller MWR-WW10N) — mandatory for operation and commissioning
  • Cylinder or hydraulic module — Samsung ClimateHub (AE200/AE260 series, 200 L or 260 L) or a compatible third-party unvented cylinder with heating coil and controls
  • Filter/strainer on the return pipe (mandatory)
  • MIM-H04N Wi-Fi Kit — optional, for SmartThings remote access
▶  What is the minimum system water volume and when is a buffer vessel needed?
Samsung specifies a minimum of 50 litres total hydraulic circuit volume for the 12 kW and 16 kW models. This includes water held in the cylinder coil, distribution pipework, and any buffer vessel. In compact installations with short pipe runs, circuit volume may fall short of 50 litres; in this case a dedicated buffer vessel must be fitted to prevent short-cycling and protect the compressor. Your installer will calculate the total volume during the design stage.
▶  How does the 16 kW 1-phase model differ from the 3-phase AE160RXYDGG/EU?
Samsung also produces a 3-phase version, the AE160RXYDGG/EU (380–415 V, 3-phase). The 1-phase AE160RXYDEG/EU covered here draws MCA 32 A / MFA 40 A from a single-phase supply, whereas the 3-phase variant spreads load across three phases at only ~5.3 A per phase. For standard UK residential installations a single-phase supply is the norm; the 3-phase variant is typically specified for commercial premises or where a 3-phase supply already exists. Heating and cooling performance specifications are identical between the two supply variants.
▶  Is the unit suitable for coastal or exposed outdoor locations?
The heat exchanger is treated with Samsung's Anti-Salt coating on both fins and tube surfaces for enhanced corrosion resistance in coastal and polluted atmospheres. The powder-coated electro-galvanised steel casing further protects against weathering. For highly exposed coastal sites (within ~500 m of breaking surf), additional protective measures or more frequent inspection and cleaning may be advisable. Always discuss the site environment with your installer as part of the heat pump survey.
Samsung EHS Gen6 Mono R32 16kW 1-Phase Air-to-Water Outdoor Heat Pump AE160RXYDEG/EU - Image 2

Details & Craftsmanship

Every detail has been carefully considered to bring you the perfect product.

Description

The Samsung EHS Mono Gen6 is a fully-contained monoblock air-to-water heat pump in which the complete refrigerant circuit — inverter-driven BLDC twin-rotary compressor, plate heat exchanger, and electronic expansion valve — is housed entirely within the outdoor unit. Only insulated water pipes run indoors, eliminating any requirement for F-Gas work on the indoor side and simplifying compliance with Building Regulations. The AE160RXYDEG/EU delivers a rated heating capacity of 16 kW at standard A7/W35 test conditions, achieving a Seasonal COP (SCOP) of 4.48 at LWT 35°C — ErP class A+++ — and SCOP 3.53 at LWT 55°C (A++) per EN 14825. This makes it eligible for the UK Boiler Upgrade Scheme (BUS) when installed by an MCS-registered contractor. The unit operates reliably down to −25°C ambient and delivers flow temperatures up to 65°C, serving both low-temperature underfloor heating circuits and existing radiator systems. R32 refrigerant (GWP 675, ODP 0) reduces CO₂-equivalent emissions by 73% compared with R410A systems of equivalent capacity.

16 kW
Rated Heating
Capacity (A7/W35)
SCOP 4.48
ErP A+++
@ LWT 35°C
−25°C
Min Ambient
Operating Temp
65°C
Max Flow
Temperature
52 dB(A)
Sound Pressure
(Heating Mode)
110.0 kg
Net Weight

⚠  Installer & Safety Critical

  • F-Gas regulations apply. R32 is a fluorinated greenhouse gas (GWP 675). All installation, commissioning, and decommissioning work must be carried out by an F-Gas certified engineer. Refrigerant site records must be maintained.
  • No integral pressure relief valve. The outdoor unit does not include a PRV. A compliant pressure relief valve must be installed in the hydraulic circuit in accordance with BS EN 12828 and Building Regulations Part G.
  • MCS registration required for BUS grant. The unit and installation must be registered by an MCS-certified installer before the Boiler Upgrade Scheme grant is submitted.
  • Minimum system water volume: 50 litres. The installer must calculate total hydraulic circuit volume and add a buffer vessel if the minimum cannot be met from pipework and cylinder coil volume alone.

⚠  Compatibility & Advisory

  • Control module not included. The outdoor unit requires the Samsung MIM-E03CN control module (which includes Touch Controller MWR-WW10N) to operate. Order separately or as part of a ClimateHub package.
  • Wi-Fi not embedded. SmartThings App connectivity requires the optional MIM-H04N Wi-Fi Kit (sold separately).
  • Dedicated electrical circuit required: 40 A MCB. This unit draws MCA 32.0 A / MFA 40.0 A. Confirm available supply capacity and cable sizing to MCA before specifying. Note: a 3-phase variant (AE160RXYDGG/EU, 380–415 V) is also available for commercial properties or where a 3-phase supply exists.
  • Filter/strainer mandatory on the return water pipe to protect the outdoor unit heat exchanger from system debris. Clean regularly to maintain minimum flow rate.

ⓘ  Product Highlights

  • MCS Listed — qualifies for the UK Boiler Upgrade Scheme (BUS) £7,500 grant when installed by an MCS-certified contractor.
  • Compatible with the Samsung ClimateHub tank-integrated hydro unit (200 L or 260 L) or third-party cylinders and control kits from various manufacturers.
  • 2-Zone Control supported — optimise a high-temperature radiator zone and a low-temperature underfloor heating zone independently from a single outdoor unit.
  • PV-Enabled & Smart Grid Ready — shifts electrical demand to periods of solar surplus or off-peak grid tariffs to minimise running costs.

Key Features

True Monoblock Architecture

Unlike a split heat pump, the EHS Mono houses the complete refrigerant circuit outdoors. No refrigerant pipework penetrates the building envelope — only insulated water pipes connect the outdoor unit to the indoor hydraulic system. This eliminates F-Gas work on the indoor side, broadens compatibility with third-party cylinders and control kits, and simplifies compliance with Building Regulations Part F.

SCOP 4.48 — ErP A+++ at LWT 35°C

Tested across a full seasonal load profile per EN 14825, this unit achieves SCOP 4.48 at a 35°C leaving water temperature — the ideal operating point for underfloor heating systems. At 55°C flow (for legacy radiator retrofits) the SCOP is 3.53 (A++), still considerably better than a condensing boiler. The inverter-driven compressor modulates continuously to match heat demand, avoiding on/off cycling losses and reducing wear.

−25°C Cold-Climate Performance

The unit maintains full rated output down to −7°C ambient (A−7/W35 peak condition: 14.6 kW) and continues to operate down to −25°C through compressor modulation and supplementary backup heating. Domestic hot water mode remains available down to −25°C, covering the entire range of UK winter conditions with confidence.

Up to 65°C Flow Temperature

A maximum leaving water temperature of 65°C allows this unit to serve legacy radiator systems without mandatory full system re-sizing, provided heat-loss calculations confirm adequate emitter output at the specified flow temperature. For maximum efficiency, the system is best designed to run at 45–55°C or lower, where the SCOP improvement over boiler operation is most significant.

Anti-Salt Heat Exchanger & Robust Casing

The louvred-fin heat exchanger uses G-Fin geometry with an Anti-Salt coating on fins and tubes to resist corrosion in coastal or industrially polluted environments. The powder-coated electro-galvanised steel casing in Samsung's Earth Brown finish provides additional weathering protection. Two axial-flow fans with BLDC motors (2 × 125 W) deliver 118 m³/min airflow at 750 rpm for high throughput with low electrical draw.

Smart Connectivity & Energy Management

Via the optional MIM-H04N Wi-Fi Kit, the unit integrates with the Samsung SmartThings ecosystem for remote on/off, scheduling, and energy monitoring from iOS or Android. The Touch Controller MWR-WW10N (included with MIM-E03CN) supports 2-Zone temperature scheduling, error monitoring, and summer-mode cooling. Smart Grid Ready and PV-Enabled logic allow demand shifting toward off-peak tariffs or surplus solar generation.

Technical Specifications

Parameter AE160RXYDEG/EU
General
Model Number AE160RXYDEG/EU
Series EHS Mono Gen6
Type Monoblock Air-to-Water Heat Pump (A2W)
Power Supply 1-phase, 220–240 V, 50 Hz
Refrigerant R32 (GWP 675, ODP 0) — fluorinated greenhouse gas
Refrigerant Charge 2.20 kg / 1.49 tCO₂e
Refrigerant Control Electronic Expansion Valve (EEV)
Heating Performance
Rated Heating Capacity (A7/W35) 16 kW
Heating Power Input (A7/W35) 3,620 W
COP (A7/W35) 4.42
Heating Capacity at A2/W35 (2°C ambient) 13.2 kW
Heating Capacity at A−7/W35 (Peak, −7°C) 14.6 kW
PdesignH at LWT 35°C 16.0 kW
PdesignH at LWT 55°C 16.0 kW
Cooling Performance
Rated Cooling Capacity (A7/W35) 14 kW
Cooling Power Input (A7/W35) 3,280 W
EER (A7/W35) 4.27
Seasonal Efficiency (EN 14825)
SCOP at LWT 35°C 4.48 — ErP Class A+++
SCOP at LWT 55°C 3.53 — ErP Class A++
SEER (Cooling) 5.31
Electrical
Current Input — Cooling 15.7 A
Current Input — Heating 17.0 A
Minimum Circuit Ampacity (MCA) 32.0 A
Maximum Fuse Ampacity (MFA) 40.0 A
Hydraulics
Leaving Water Temp — Heating Range 15–65°C
Leaving Water Temp — Cooling Range 5–25°C
Nominal Water Flow Rate (H/C) 46.2 / 40.4 LPM (H/C)
Minimum Water Flow Rate 12.0 LPM
Maximum Water Flow Rate 58.0 LPM
Maximum System Water Pressure 3 bar
Water Pipe Connections BSPP Male 1″ (inlet & outlet)
Minimum System Water Volume 50 litres (buffer vessel recommended if not achieved)
Operating Conditions
Heating Ambient Range −25°C to +35°C
Cooling Ambient Range +10°C to +46°C
Domestic Hot Water Ambient Range −25°C to +43°C
Airside & Heat Exchanger
Air Flow Rate 118 m³/min
Fan Quantity / Type 2 × Axial Propeller, Brushless DC Motor
Fan Motor Output 2 × 125 W
Fan Speed 750 rpm
Fan Discharge Direction Horizontal
Heat Exchanger Fin Type G-Fin Louvred
Heat Exchanger Tube Diameter Φ7.94 mm, 2-row
Fin/Coil Treatment Anti-Salt coating
Acoustics (ISO 3741)
Sound Pressure Level — Heating Mode 52 dB(A)
Sound Power Level — Heating Mode 66 dB(A)
Sound Pressure Level — Cooling Mode 54 dB(A)
Sound Power Level — Cooling Mode 68 dB(A)
Compressor
Compressor Type BLDC Twin Rotary, Inverter Driven
Compressor Oil Type / Initial Charge POE / 1,700 cc
Physical
Net Dimensions (W × H × D) 940 × 1,420 × 330 mm
Net Weight 110.0 kg
Casing Material Powder-coated electro-galvanised steel
Casing Colour Earth Brown
Controls & Connectivity
Control Module (required, sold separately) MIM-E03CN (incl. Touch Controller MWR-WW10N)
Wi-Fi Connectivity Optional — MIM-H04N Wi-Fi Kit (sold separately)
SmartThings App Compatible Yes (requires MIM-H04N)
2-Zone Control Yes
PV-Enabled Yes
Smart Grid Ready Yes

Frequently Asked Questions

▶  Does this unit qualify for the UK Boiler Upgrade Scheme (BUS) grant?
Yes. The AE160RXYDEG/EU is MCS listed and qualifies for the BUS grant (currently £7,500 for air source heat pumps). The installation must be completed by an MCS-certified installer, and the unit must be registered under the scheme before the grant claim is submitted. The installer is responsible for MCS registration and EPC requirements.
▶  Can this heat pump work with my existing radiators as well as underfloor heating?
Yes. The unit can supply flow temperatures up to 65°C, making it capable of driving legacy radiator systems. However, the greatest efficiency — SCOP 4.48 at LWT 35°C — is achieved at lower flow temperatures. Most retrofit projects involve upsizing radiators to allow the system to run at 45–55°C rather than 70–80°C, significantly improving seasonal efficiency and reducing running costs. A heat-loss survey and radiator capacity check by a qualified installer are essential before specifying flow temperatures.
▶  What control module and accessories are required?
The outdoor unit alone is not a complete system. The following are required or recommended:
  • MIM-E03CN Control Module (includes Touch Controller MWR-WW10N) — mandatory for operation and commissioning
  • Cylinder or hydraulic module — Samsung ClimateHub (AE200/AE260 series, 200 L or 260 L) or a compatible third-party unvented cylinder with heating coil and controls
  • Filter/strainer on the return pipe (mandatory)
  • MIM-H04N Wi-Fi Kit — optional, for SmartThings remote access
▶  What is the minimum system water volume and when is a buffer vessel needed?
Samsung specifies a minimum of 50 litres total hydraulic circuit volume for the 12 kW and 16 kW models. This includes water held in the cylinder coil, distribution pipework, and any buffer vessel. In compact installations with short pipe runs, circuit volume may fall short of 50 litres; in this case a dedicated buffer vessel must be fitted to prevent short-cycling and protect the compressor. Your installer will calculate the total volume during the design stage.
▶  How does the 16 kW 1-phase model differ from the 3-phase AE160RXYDGG/EU?
Samsung also produces a 3-phase version, the AE160RXYDGG/EU (380–415 V, 3-phase). The 1-phase AE160RXYDEG/EU covered here draws MCA 32 A / MFA 40 A from a single-phase supply, whereas the 3-phase variant spreads load across three phases at only ~5.3 A per phase. For standard UK residential installations a single-phase supply is the norm; the 3-phase variant is typically specified for commercial premises or where a 3-phase supply already exists. Heating and cooling performance specifications are identical between the two supply variants.
▶  Is the unit suitable for coastal or exposed outdoor locations?
The heat exchanger is treated with Samsung's Anti-Salt coating on both fins and tube surfaces for enhanced corrosion resistance in coastal and polluted atmospheres. The powder-coated electro-galvanised steel casing further protects against weathering. For highly exposed coastal sites (within ~500 m of breaking surf), additional protective measures or more frequent inspection and cleaning may be advisable. Always discuss the site environment with your installer as part of the heat pump survey.