Warmflow Zeno GS03
Specifications and technical data
✓ BUS eligibleGSHP (Brine/Water)ResidentialR410A4.5–18 kW
| Manufacturer | Warmflow |
|---|---|
| Model | Zeno GS03 |
| Model code | GS03 |
| Heat pump type | GSHP (Brine/Water) |
| Application | Residential All Residential heat pumps → |
| Refrigerant | R410A All R410A heat pumps → |
| Mode | Heating only |
| 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 supply | 220-240V (Single Phase) |
| Dimensions (H×W×D) | 890 × 590 × 660 mm |
| Operational Weight | 130 kg |
| Price (unit only) | £10,405.65–£10,624.69 (checked 2026-07-17) |
| Data added | 17/07/2026 |
| Data source | UK Retailer Pricing (Wolseley £10,624.69 ex VAT; City Plumbing £12,486.78 inc VAT listed as model GS16), ex VAT shown |
| Verification | Verified by a human |
| Boiler Upgrade Scheme | ✓ BUS eligible — Listed on the Ofgem BUS Product Eligibility List (24 Sep 2026). Grant also needs an MCS-certified installer and a qualifying system design. Funding guide |
| PEL certificate no. | KM 612798/12 |
| MCS certification | ✓ MCS listed |
| MCS certificate no. | KM 612798/12 |
| MCS listing | View on MCS ↗ |
Ground source (brine/water) heat pump, single-phase electricity supply up to 18kW, variable-speed high-efficiency Grundfos pump for heating & brine circuits, electronic expansion valve, high-flow heat exchangers, flow temperature up to 60C, installation accessories (flexible hoses, filters, 3-port diverting valve) included as standard
Where to buy (UK)
| UK Supplier | Plumbnation |
|---|---|
| UK Supplier | Inspired Heating |
| UK Supplier | Wolseley |
| UK Supplier | City Plumbing |
| UK Supplier | HVAC-Sanitary |
✎ Suggest a correction to this data
Data is compiled from manufacturer sources and may contain errors or gaps. Always confirm specifications with the manufacturer before making decisions.
Reviews & further reading
- Manufacturer Zeno Air Source Heat Pumps — Warmflow
- Manufacturer Zeno Ground Source Heat Pumps — Warmflow
►Warmflow Zeno R290 Air Source Heat Pump - IntroductionWarmflow
►ZENO AIR SOURCE HEAT PUMP // SHORT INTROWarmflowMore from Warmflow
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