Heliotherm Comfort Compact (air) (4.1–12.2 kW)

Specifications and technical data

✓ BUS eligibleAir Source (ASHP)ResidentialR410A4.1–12.2 kW

Manufacturer	Heliotherm
Model	Comfort Compact (air)
Model code	S 12 L-M-CC
Heat pump type	Air Source (ASHP) All Air Source heat pumps →
Application	Residential All Residential heat pumps →
Refrigerant	R410A All R410A heat pumps →
Mode	Heating only
Heating capacity	4.1–12.2 kW
Max heating output (low temp)	12 kW at A-10/W35
SCOP (heating)	4.6 at W35
Heating flow temperature	up to 62 °C
Dimensions (H×W×D)	1702 × 935 × 1002 mm
Operational Weight	256 kg
Sound power level	50 dB(A) (Sound Power LW(A))
Data added	2026-10-20
Data source	Heliotherm Air Heat Pump Comfort Compact brochure (March 2024)
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.	BBA 0136/18
MCS certification	✓ MCS listed
MCS certificate no.	BBA 0136/18

Free data sheet (PDF) →

Check noise at a neighbour’s window (MCS 020 a) →

Heliotherm Comfort Compact S 12 L-M-CC fully modulating air-to-water heat pump for outdoor installation, 4.1-12.2 kW, flow up to 62 °C, optional reversible cooling.

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Data is compiled from manufacturer sources and may contain errors or gaps. Always confirm specifications with the manufacturer before making decisions.