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Viessmann Vitocal 250-A PRO
Model code: AWO-AC-AF 251.A40
✓ BUS eligible✓ MCS listedAir Source (ASHP)CommercialHeating & cooling
Heating capacity
39.5 kW
COP
3.8
A7/W35
Max flow temp
70°C
Sound power
69.8 dB(A)
Refrigerant
R290
Boiler Upgrade Scheme
✓ BUS eligible
Listed on the Ofgem BUS Product Eligibility List (24 Sep 2026).
PEL certificate: 011-1W0833_01
Grant also needs an MCS-certified installer and a qualifying system design.
MCS certification
✓ MCS listed
Certificate: 011-1W0833_01
| General | |
|---|---|
| Heat pump type | Air Source (ASHP) |
| Application | Commercial |
| Refrigerant | R290 |
| Mode | Heating & cooling |
| Heating performance | |
| Heating capacity | 39.5 kW |
| Max heating output (low temp) | 39.5 kW at A7/W35 |
| COP (heating) | 3.8 at A7/W35 |
| Heating flow temperature | up to 70 °C |
| Cooling performance | |
| Cooling capacity | 26 kW |
| Max cooling output (high temp) | 26 kW at A35/W7 |
| Electrical, acoustic and physical | |
| Electrical supply | 380-415V (Three Phase) |
| Sound power level | 69.8 dB(A) (Sound Power LW(A)) |
| Dimensions (H×W×D) | 1570 × 1900 × 940 mm |
| Operational Weight | 550 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.