The Samsung EHS Mono R32 12kW Three-Phase Air Source Heat Pump is the three-phase version of Samsung's Gen 6 monobloc platform, built for larger UK homes and small commercial buildings where a three-phase electrical supply is available. As with every unit in the Mono range, the full refrigeration circuit is factory-sealed inside the outdoor unit, removing the need for F-Gas handling on site.
This unit delivers the same 12.00 kW heating capacity and COP of 4.53 at standard A7/W35 conditions as its single-phase equivalent, while spreading the electrical load across three phases for a lower current draw per line. It continues to operate reliably down to -25°C outdoor air temperature, with leaving water temperatures of up to 65°C suiting both underfloor heating and radiator systems.
12.0kW
Heating Output
4.53
COP (A7/W35)
-25°C
Min. Operating Temp
65°C
Max Flow Temp
50 dBA
Sound Pressure
R32
Refrigerant (GWP 675)
Lead Time - Please Check Before Ordering
This three-phase unit typically carries a lead time of up to 15 business days. Please contact us to confirm current stock and lead time before placing an order, particularly where installation is scheduled against a fixed date.
MCS Installation & Control Kit Required
This is an outdoor unit only. A Samsung control kit (MIM-E03EN or equivalent) or a pre-plumbed cylinder solution such as a Samsung ClimateHub is required to complete a working heating and hot water system. Installation must be carried out by an MCS-certified installer to qualify for BUS grant funding and the extended manufacturer warranty.
Compatible Control Kits & Wi-Fi
This unit is completed with either the MIM-E03EN or MIM-E03FN control kit (sold separately) - both provide full heating, hot water, and mixing valve control, with the MIM-E03FN adding a 7" touchscreen display over the standard wired controller. Add the MIM-H04EN Wi-Fi Controller Kit to either control kit for remote monitoring and control via the Samsung SmartThings app. Alternatively, pair this heat pump with a pre-plumbed Samsung ClimateHub or Joule Kodiak cylinder, which include the necessary controls built in.
Up to 7-Year Warranty
Samsung backs this unit with a standard warranty extendable to 7 years when installed and registered by a Samsung-trained EHS installer, giving long-term cover on one of the most established heat pump platforms sold in the UK.
True Monobloc Design
The entire refrigerant circuit is factory-sealed in the outdoor unit, removing the need for on-site refrigerant handling, F-Gas certification, or an indoor hydro box.
Balanced Three-Phase Load
Distributes electrical draw across three phases (380-415V, 50Hz), reducing current per phase compared with the single-phase 12kW equivalent.
High-Output Cold-Climate Performance
Rated to operate continuously down to -25°C outdoor air temperature, maintaining full heating output through the coldest UK winters.
Strong Efficiency at Higher Capacity
Delivers a COP of 4.53 at standard A7/W35 test conditions, matching the thermal performance of the single-phase 12kW model.
Low-GWP R32 Refrigerant
Uses R32 refrigerant (GWP 675), requiring a smaller charge than older R410A systems for a reduced environmental footprint.
Quiet BLDC Twin Rotary Compressor
The BLDC Twin Rotary compressor keeps sound pressure to 50 dBA despite the higher heating capacity.
Performance
Heating Capacity (A7/W35)
12.00 kW
Cooling Capacity (A35/W18)
12.00 kW
COP (Heating, A7/W35)
4.53
EER (Cooling)
4.33
Leaving Water Temperature (Heating)
15-65°C
Leaving Water Temperature (Cooling)
5-25°C
Operating Range (Heating)
-25°C to +35°C outdoor
Operating Range (Cooling)
10°C to 46°C outdoor
Domestic Hot Water Range
-25°C to +43°C outdoor
Electrical
Power Supply
Three phase, 380-415V, 50Hz
Power Input (Heating)
2.650 kW
Power Input (Cooling)
2.770 kW
Refrigerant & Compressor
Refrigerant Type
R32 (GWP 675)
Factory Refrigerant Charge
2.20 kg (1.49 tCO₂e)
Compressor Type
BLDC Twin Rotary
Control Method
Electronic Expansion Valve (EEV)
Physical & Acoustic
Net Dimensions (W x H x D)
940 x 1,420 x 330 mm
Net Weight
110.0 kg
Sound Pressure Level
50 dBA
Sound Power Level
65 dBA
Water Connections
1" BSPP male, inlet/outlet
Confirm Exact Circuit Rating With Your Installer
Per-phase MCA/MFA figures for this three-phase model should be confirmed against Samsung's current installation manual for the exact site voltage, as they are not published on the standard specification sheet used for this listing. Your installer will size the circuit protection based on the nameplate rating of the unit supplied.
Why choose the three-phase version over single-phase?
The three-phase 12kW unit delivers identical heating capacity and efficiency to the single-phase model, but spreads a higher electrical load across three lines rather than one, which is often the more practical option at this capacity.
What is the typical lead time on this product?
This three-phase unit typically has a lead time of up to 15 business days. Please contact us to confirm current stock and lead time before ordering, especially for time-sensitive installations.
Does this heat pump include an indoor control unit or cylinder?
No. This listing is for the outdoor monobloc unit only. To complete a working system you will need a compatible Samsung control kit or a pre-plumbed cylinder solution such as a ClimateHub, sold separately.
Is MCS certification required for installation?
Yes. Installation should be carried out by an MCS-certified installer to ensure compliance with UK regulations, to qualify for available government funding schemes, and to validate the manufacturer's extended warranty.
Can this heat pump run underfloor heating and radiators together?
Yes. With a maximum leaving water temperature of 65°C, the unit can supply both low-temperature underfloor heating and standard radiator circuits, subject to correct system design and zoning.
BTU & WATT Calculator
Room Dimensions
Room Type
Living Room
Bedroom
Kitchen
Bathroom
Conservatory
Hallway
Glazing Type
Single Glazed
Double Glazed
Triple Glazed
External Walls
0 Wall
1 Wall
2 Walls
3 Walls
4 Walls
Insulation Level
Poor
Average
Good (New Build)
Required Heating
0
Watts
0
BTUs
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