heatpumpdatabaseProduct data sheetheatpumpdatabase.com
Vaillant aroTHERM plus
Model code: VWL 125/6 A S2
✓ BUS eligible✓ MCS listedAir Source (ASHP)ResidentialHeating & cooling
Heating capacity
12 kW
COP
4.7
A7/W35
Max flow temp
75°C
Sound power
60 dB(A)
Refrigerant
R290
Boiler Upgrade Scheme
✓ BUS eligible
Listed on the Ofgem BUS Product Eligibility List (24 Sep 2026).
PEL certificate: KIWA 00044/002 HP
Grant also needs an MCS-certified installer and a qualifying system design.
MCS certification
✓ MCS listed
Certificate: KIWA 00044/002 HP
| General | |
|---|---|
| Heat pump type | Air Source (ASHP) |
| Application | Residential |
| Refrigerant | R290 |
| Mode | Heating & cooling |
| Heating performance | |
| Heating capacity | 12 kW |
| COP (heating) | 4.7 at A7/W35 |
| Heating flow temperature | 10–75 °C |
| Cooling performance | |
| Cooling capacity | 10.8 kW |
| EER (cooling) | 3.5 at A35/W7 |
| Electrical, acoustic and physical | |
| Electrical supply | 380-415V (Three Phase) |
| Sound power level | 60 dB(A) (Sound Power LW(A)) |
| Dimensions (H×W×D) | 1565 × 1100 × 490 mm |
Test conditions: A = outdoor air °C, W = flow water °C (e.g. A7/W35 = 7°C air, 35°C flow). Compare COP and SCOP only at the same conditions.