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Warmflow Zeno GS03
Model code: GS03
✓ BUS eligible✓ MCS listedGSHP (Brine/Water)ResidentialHeating only
Heating capacity
4.5–18 kW
COP
4.87
B0/W35
Max flow temp
60°C
Refrigerant
R410A
Boiler Upgrade Scheme
✓ BUS eligible
Listed on the Ofgem BUS Product Eligibility List (24 Sep 2026).
PEL certificate: KM 612798/12
Grant also needs an MCS-certified installer and a qualifying system design.
MCS certification
✓ MCS listed
Certificate: KM 612798/12
| General | |
|---|---|
| Heat pump type | GSHP (Brine/Water) |
| Application | Residential |
| Refrigerant | R410A |
| Mode | Heating only |
| Heating performance | |
| Heating capacity | 4.5–18 kW |
| Max heating output (low temp) | 8.53 kW at B0/W35 |
| COP (heating) | 4.87 at B0/W35 |
| Operating range (air) | -5 to 15 °C |
| Heating flow temperature | 30–60 °C |
| Electrical, acoustic and physical | |
| Electrical supply | 220-240V (Single Phase) |
| Dimensions (H×W×D) | 890 × 590 × 660 mm |
| Operational Weight | 130 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.