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Heliotherm Comfort Compact (air)
Model code: S 18 L-M-CC
✓ BUS eligible✓ MCS listedAir Source (ASHP)ResidentialHeating only
Heating capacity
5.1–19.1 kW
SCOP
5
W35
Max flow temp
62°C
Sound power
51 dB(A)
Refrigerant
R410A
Boiler Upgrade Scheme
✓ BUS eligible
Listed on the Ofgem BUS Product Eligibility List (24 Sep 2026).
PEL certificate: BBA 0136/19
Grant also needs an MCS-certified installer and a qualifying system design.
MCS certification
✓ MCS listed
Certificate: BBA 0136/19
| General | |
|---|---|
| Heat pump type | Air Source (ASHP) |
| Application | Residential |
| Refrigerant | R410A |
| Mode | Heating only |
| Heating performance | |
| Heating capacity | 5.1–19.1 kW |
| Max heating output (low temp) | 18.1 kW at A-10/W35 |
| SCOP (heating) | 5 at W35 |
| Heating flow temperature | up to 62 °C |
| Electrical, acoustic and physical | |
| Sound power level | 51 dB(A) (Sound Power LW(A)) |
| Dimensions (H×W×D) | 1702 × 935 × 1002 mm |
| Operational Weight | 262 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.