Vaillant aroTHERM plus (12 kW)
Specifications and technical data
✓ BUS eligibleAir Source (ASHP)ResidentialR29012 kW
| Manufacturer | Vaillant |
|---|---|
| Model | aroTHERM plus |
| Model code | VWL 125/6 A S2 |
| Heat pump type | Air Source (ASHP) All Air Source heat pumps → |
| Application | Residential All Residential heat pumps → |
| Refrigerant | R290 All R290 heat pumps → |
| Mode | Heating & cooling |
| Heating capacity | 12 kW |
| COP (heating) | 4.7 at A7/W35 |
| Heating flow temperature | 10–75 °C |
| Electrical supply | 380-415V (Three Phase) |
| Cooling capacity | 10.8 kW |
| EER (cooling) | 3.5 at A35/W7 |
| Dimensions (H×W×D) | 1565 × 1100 × 490 mm |
| Sound power level | 60 dB(A) (Sound Power LW(A)) |
| Price (unit only) | £4,966.29–£6,386.33 (checked 28/08/2026) |
| Data added | 22/06/2026 |
| Data source | Manufacturer Data Sheet |
| Verification | Verified by a human |
| Boiler Upgrade Scheme | ✓ BUS eligible — Listed on the Ofgem BUS Product Eligibility List (24 Sep 2026). Grant also needs an MCS-certified installer and a qualifying system design. Funding guide |
| PEL certificate no. | KIWA 00044/002 HP |
| MCS certification | ✓ MCS listed |
| MCS certificate no. | KIWA 00044/002 HP |
| MCS listing | View on MCS ↗ |
| Real-world performance data | View on HeatpumpMonitor.org ↗ |
Check noise at a neighbour’s window (MCS 020 a) →
Vaillant aroTHERM plus is a 12 kW air source heat pump, providing heating and cooling, using R290 refrigerant.
Where to buy (UK)
| UK Supplier | The Heat Pump Warehouse |
|---|---|
| UK Supplier | Secon Renewables |
| UK Supplier | City Plumbing |
| UK Supplier | Pirate Heating Supplies |
| UK Supplier | Eco Wizard |
✎ Suggest a correction to this data
Data is compiled from manufacturer sources and may contain errors or gaps. Always confirm specifications with the manufacturer before making decisions.
Reviews & further reading
- Manufacturer NEW aroTHERM plus — Vaillant
- Manufacturer aroTHERM plus — Vaillant
- Review Vaillant aroTHERM plus Heat Pump: Full Guide — Heat GeekIndependent UK installer network's in-depth guide covering real-world performance, sizing and common issues.
- Review The new Vaillant aroTHERM Plus heat pump — Dwellow
- Review Vaillant aroTHERM Plus Air Source Heat Pump Review 2026 — Heatable
- Review Vaillant Arotherm Heat Pump Review: R290, COP, Price, UK Guide — Home Heat Pump GuideCovers the wider Vaillant range
- Real-world data Real-world performance: Vaillant Arotherm+ 12kW — HeatpumpMonitor.org29 monitored systems listed (Sept 2026)
►Air Source Heat Pumps - After Install - Vaillant Arotherm Plus ReviewYouTube2022-08
►Vaillant Arotherm Plus Heat Pump Installation by British GasUpsideDownFork
►Vaillant Arotherm Plus Heat Pump VRC720 SensoCOMFORT SettingsUpsideDownFork
►Vaillant Arotherm Plus 10kW Installation Guide: 160m² UFHUrban PlumbersAlternatives to consider
Three Air Source (ASHP) heat pumps from other manufacturers closest in capacity to this one.
Aquarea M Series
Panasonic · WH-WXG12ME5
- Capacity
- 12 kW
- SCOP
- 5 (W35)
- Sound power
- 53 dB(A)
- Refrigerant
- R290
- Price
- ~£4,795
iTec XTR
Thermia · iTec XTR L
- Capacity
- 3–12 kW
- SCOP
- 5.1 (W35)
- Sound power
- 75 dB(A)
- Refrigerant
- R290
ESTIA BiBloc All-in-One
Toshiba · HWP-1001HW-E AIO
- Capacity
- 2.6–12 kW
- SCOP
- 4.83 (W35)
- Sound power
- 66 dB(A)
- Refrigerant
- R290
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Other Air Source (ASHP) heat pumps
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ASHP · 300–600 kW
H-1200 CO₂
ASHP · 600–1200 kW
H-1800 CO₂
ASHP · 900–1800 kW
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ASHP · 1500–3000 kW
NX-Q-G06
ASHP · 157.5 kW
NX-Q-G06
ASHP · 174.6 kW
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