heatpumpdatabaseProduct data sheetheatpumpdatabase.com
Vaillant aroTHERM (VWL /2)
Model code: VWL 155/2 A 230V
✓ BUS eligible✓ MCS listedAir Source (ASHP)ResidentialHeating only
Heating capacity
14.26 kW
COP
3.85
A7/W35
Max flow temp
63°C
Sound power
65 dB(A)
Refrigerant
R410A
Boiler Upgrade Scheme
✓ BUS eligible
Listed on the Ofgem BUS Product Eligibility List (24 Sep 2026).
PEL certificate: KIWA 00016/012 HP
Grant also needs an MCS-certified installer and a qualifying system design.
MCS certification
✓ MCS listed
Certificate: KIWA 00016/012 HP
| General | |
|---|---|
| Heat pump type | Air Source (ASHP) |
| Application | Residential |
| Refrigerant | R410A |
| Mode | Heating only |
| Heating performance | |
| Heating capacity | 14.26 kW |
| Max heating output (low temp) | 10.79 kW at A-7/W35 |
| COP (heating) | 3.85 at A7/W35 |
| Operating range (air) | -20 to 28 °C |
| Heating flow temperature | up to 63 °C |
| Electrical, acoustic and physical | |
| Electrical supply | 220-240V (Single Phase) |
| Sound power level | 65 dB(A) (Sound Power LW(A)) |
| Dimensions (H×W×D) | 1375 × 1103 × 463 mm |
| Operational Weight | 165 kg |
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.