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Warmflow Zeno AS03 R290
Model code: AS03-R290
✓ BUS eligible✓ MCS listedAir Source (ASHP)ResidentialHeating only
Heating capacity
8–22 kW
SCOP
4.65
W35
COP
4.71
A7/W35
Max flow temp
75°C
Sound power
64 dB(A)
Refrigerant
R290
Boiler Upgrade Scheme
✓ BUS eligible
Listed on the Ofgem BUS Product Eligibility List (24 Sep 2026).
PEL certificate: BSI KM 612798/11
Grant also needs an MCS-certified installer and a qualifying system design.
MCS certification
✓ MCS listed
Certificate: BSI KM 612798/11
| General | |
|---|---|
| Heat pump type | Air Source (ASHP) |
| Application | Residential |
| Refrigerant | R290 |
| Mode | Heating only |
| Heating performance | |
| Heating capacity | 8–22 kW |
| Max heating output (low temp) | 22 kW at A7/W35 |
| COP (heating) | 4.71 at A7/W35 |
| SCOP (heating) | 4.65 at W35 |
| Operating range (air) | -25 to 43 °C |
| Heating flow temperature | 20–75 °C |
| Electrical, acoustic and physical | |
| Electrical supply | 220-240V (Single Phase) |
| Sound power level | 64 dB(A) (Sound Power LW(A)) |
| Dimensions (H×W×D) | 1330 × 1250 × 540 mm |
| Operational Weight | 202 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.