heatpumpdatabaseProduct data sheetheatpumpdatabase.com
Vaillant aroTHERM pro
Model code: VWL 55/7.1 A 230V S2
✓ BUS eligibleAir Source (ASHP)ResidentialHeating only
Heating capacity
6.55 kW
COP
4.93
A7/W35
Max flow temp
70°C
Sound power
49 dB(A)
Refrigerant
R290
Boiler Upgrade Scheme
✓ BUS eligible
Listed on the Ofgem BUS Product Eligibility List (24 Sep 2026).
PEL certificate: 011-1W1212_01
Grant also needs an MCS-certified installer and a qualifying system design.
MCS certification
No MCS listing recorded.
| General | |
|---|---|
| Heat pump type | Air Source (ASHP) |
| Application | Residential |
| Refrigerant | R290 |
| Mode | Heating only |
| Heating performance | |
| Heating capacity | 6.55 kW |
| Max heating output (low temp) | 4.84 kW at A-7/W35 |
| COP (heating) | 4.93 at A7/W35 |
| Operating range (air) | -25 to 43 °C |
| Heating flow temperature | 10–70 °C |
| Electrical, acoustic and physical | |
| Electrical supply | 220-240V (Single Phase) |
| Sound power level | 49 dB(A) (Sound Power LW(A)) |
| Dimensions (H×W×D) | 750 × 1104 × 454 mm |
| Operational Weight | 84.5 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.