heatpumpdatabaseProduct data sheetheatpumpdatabase.com
Nibe S1155
Model code: S1155-25
✓ BUS eligible✓ MCS listedGround Source (GSHP)CommercialHeating only
Heating capacity
6–25 kW
SCOP
5.2
W55
COP
4.68
B0/W35
Max flow temp
65°C
Sound power
47 dB(A)
Refrigerant
R410A
Boiler Upgrade Scheme
✓ BUS eligible
Listed on the Ofgem BUS Product Eligibility List (24 Sep 2026).
PEL certificate: 012-C700074
Grant also needs an MCS-certified installer and a qualifying system design.
MCS certification
✓ MCS listed
Certificate: 012-C700074
| General | |
|---|---|
| Heat pump type | Ground Source (GSHP) |
| Application | Commercial |
| Refrigerant | R410A |
| Mode | Heating only |
| Heating performance | |
| Heating capacity | 6–25 kW |
| Max heating output (low temp) | 12.68 kW at W0/W35 |
| COP (heating) | 4.68 at B0/W35 |
| SCOP (heating) | 5.2 at W55 |
| Operating range (air) | -12 to 30 °C |
| Heating flow temperature | 20–65 °C |
| Electrical, acoustic and physical | |
| Power input | 2.71 kW |
| Electrical supply | Not stated |
| Sound power level | 47 dB(A) (Sound Power LW(A)) |
| Dimensions (H×W×D) | 1500 × 600 × 620 mm |
| Operational Weight | 205 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.