The Vaillant aroTHERM plus v2, 3-phase, in 10kW and 12kW outputs, is the 400V three-phase version of Vaillant's next-generation flagship air source heat pump, supplied here without an interface (heat pump only). Designed for properties with a three-phase electrical supply, or where a lower per-phase current draw is preferred, this monobloc unit uses the natural refrigerant R290 and shares the same high-efficiency, low-noise platform as the single-phase aroTHERM plus v2 range, including Vaillant's Flexible Space Function for reduced installation clearances.
Up to 75°C
Max Flow Temperature
GWP 0.02
10-Year Global Warming Potential
211kg
Weight, Ready for Operation
14A
Rated Current, Maximum
Lower Per-Phase Current Draw
Spreading the electrical load across three phases reduces the maximum rated current to just 14A, compared to 25A on the single-phase 230V equivalent, which can simplify the electrical supply design on some properties.
Supplied Without Interface
This listing covers the heat pump unit only. A VWZ AI control module, hydraulic module, or uniTOWER pre-plumbed indoor unit must be selected separately depending on the system design.
Qualified Electrical Installation Required
Three-phase (400V) electrical devices must be installed by a suitably qualified electrical contractor in accordance with BS 7671 IET Wiring Regulations. All Vaillant heat pumps must be installed with a Type B RCD rated to 20kHz or greater with a minimum trigger point of 150mA above 1kHz. Confirm the property's electrical supply arrangement and DNO requirements before specifying a three-phase heat pump.
Three-Phase Electrical Supply
Drawing power across three phases rather than one reduces the per-phase current demand compared to an equivalent single-phase unit, which can simplify the electrical supply design on some properties.
Flexible Space Function
Shares the v2 platform's significantly reduced protection zone around the outdoor unit, providing greater freedom when positioning the heat pump on site once activated in the installer settings.
High Flow Temperatures, Low GWP
Delivers flow temperatures of up to 75°C, while R290's 10-year GWP of just 0.02 makes it significantly more climate-friendly than the traditionally assumed value of 3 often quoted for R290 systems.
High-Output Range
At 10kW and 12kW, these are the largest outputs in the aroTHERM plus v2 range, suited to larger homes or properties with higher simultaneous heating and hot water demand.
Twin-Fan Design
Fitted with two fans to move the higher air volume of 5100m³/h maximum required at this output, maintaining efficient heat exchange at higher capacities.
Up to 7-Year Extended Guarantee
The aroTHERM plus v2 comes with an extended guarantee of up to 7 years when registered with a Vaillant cylinder on myREWARDS.
Model Variants in This Range
| Output |
Vaillant Article Number |
Rated Current |
Weight |
| 10kW (400V) |
8000049529 |
14A |
211kg |
| 12kW (400V) |
8000049530 |
14A |
211kg |
Technical Specification
| General |
| Dimensions (H x W x D) |
1480mm x 1100mm x 450mm |
| Weight, ready for operation |
211kg |
| Heating Circuit Connection |
G 1¼" |
| IP Rating |
IPX4 |
| Fan Quantity |
2 |
| Fan Air Flow, Maximum |
5100 m³/h |
| Electrical |
| Rated Voltage |
400V (+10%/-15%), 50Hz, 3~/N/PE |
| Rated Current, Maximum |
14A |
| Fuse Type |
Characteristic C, slow-blow, single-pole switching |
| RCD Type |
Type B, rated to 20kHz or greater, min. trigger 150mA above 1kHz |
| Heating Circuit |
| Heating Water Temperature Range |
20°C to 75°C |
| Minimum / Maximum Volume Flow |
1075 L/h / 2065 L/h |
| Maximum Static Height Difference (outdoor to highest point) |
13m |
| Minimum / Maximum Operating Pressure |
0.5 bar / 2.5 bar |
| Water Volume in the Outdoor Unit |
4.5L |
| Refrigerant Circuit |
| Fluid Type |
R290 |
| Fluid Fill Quantity |
1.3kg |
| Global Warming Potential (GWP), 10-year |
0.02 |
| Compressor Type |
Scroll compressor |
| Compressor Oil Type |
Specific polyalkylene glycol (PAG) |
| Noise & Efficiency |
| Energy Efficiency Class, 35°C |
A+++ |
| Energy Efficiency Class, 55°C |
A+++ |
Frequently Asked Questions
What does 'without Interface' mean for this heat pump?
It means the listing is for the outdoor heat pump unit only. The VWZ AI control module, hydraulic module, or uniTOWER indoor unit must be selected and ordered separately based on the intended system design.
Why choose a three-phase (400V) heat pump over single-phase?
A three-phase supply spreads the electrical load across three phases rather than one, reducing the maximum rated current to 14A versus 25A on the single-phase 230V equivalent. This can be preferable on properties that already have a three-phase supply, or where the local electrical infrastructure or DNO favours a lower single-phase current.
Can I install a three-phase heat pump on a single-phase domestic supply?
No. A three-phase heat pump requires a genuine 3-phase, 400V electrical supply. Confirm the property's electrical arrangement with a qualified electrician before specifying this model.
What is the difference between this and the single-phase 10kW/12kW aroTHERM plus v2?
The heating performance, refrigerant circuit, and physical dimensions are essentially the same platform; the key differences are the electrical supply requirement (400V three-phase vs 230V single-phase) and a slightly higher operating weight (211kg vs 196kg) due to the three-phase electrical components.
Is DNO notification required before installing a three-phase heat pump?
Yes. All heat pump installations, including three-phase units, require notification or application to the local Distribution Network Operator (DNO) before or shortly after connection – confirm current requirements for the specific installation address.
