heatpumpdatabaseProduct data sheetheatpumpdatabase.com
Zealux XAH12Csi9
Model code: XAH12Csi9
✓ BUS eligible✓ MCS listedAir Source (ASHP)ResidentialHeating only
Heating capacity
12.12 kW
COP
4.57
A7/W35
Max flow temp
55°C
Refrigerant
R290
Boiler Upgrade Scheme
✓ BUS eligible
Listed on the Ofgem BUS Product Eligibility List (24 Sep 2026).
PEL certificate: 011-1W0814_1
Grant also needs an MCS-certified installer and a qualifying system design.
MCS certification
✓ MCS listed
Certificate: 011-1W0814_1
| General | |
|---|---|
| Heat pump type | Air Source (ASHP) |
| Application | Residential |
| Refrigerant | R290 |
| Mode | Heating only |
| Heating performance | |
| Heating capacity | 12.12 kW |
| Max heating output (low temp) | 8 kW at A-7/W55 |
| COP (heating) | 4.57 at A7/W35 |
| Operating range (air) | -30 to 43 °C |
| Heating flow temperature | up to 55 °C |
| Cooling performance | |
| Cooling flow temperature | 7–18 °C |
| Electrical, acoustic and physical | |
| Power input | 5.2 kW |
| Electrical supply | 220-240V (Single Phase) |
| Dimensions (H×W×D) | 1260 × 1052 × 453 mm |
| Operational Weight | 107 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.