Stiebel Eltron WPL A / AC / AS / ACS (WPL 25 ACS)

Specifications and technical data

Air Source (ASHP)ResidentialR410A7.85–14.3 kW

Manufacturer	Stiebel Eltron
Model	WPL A / AC / AS / ACS
Model code	WPL 25 ACS
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 & cooling
Heating capacity	7.85–14.3 kW
Max heating output (low temp)	11.96 kW at A-15/W35
COP (heating)	4.82 at A7/W35
SCOP (heating)	4.53 at W35
Operating range (air)	-20 to 40 °C
Heating flow temperature	15–65 °C
Electrical supply	220-240V (Single Phase)
Cooling capacity	14.88 kW
Max cooling output (high temp)	14.88 kW at A35/W7
EER (cooling)	2.38 at A35/W7
Dimensions (H×W×D)	1045 × 1490 × 593 mm
Operational Weight	175 kg
Sound power level	54 dB(A) (Sound Power LW(A))
Data added	2026-09-26
Data source	Manufacturer documentation (Stiebel Eltron)
Verification	Verified by a human
MCS certification	✓ MCS listed
MCS certificate no.	011-1W0492

Free data sheet (PDF) →

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

Stiebel Eltron WPL 25 ACS, inverter air-to-water monobloc heat pump, R410A. 8.0 kW at A7/W35 with a COP of 4.82, modulating 7.85 to 12.85 kW; SCOP 4.53. Heating and cooling. Flow to 65 C, operates down to -20 C. Sound power 54 dB(A). Single-phase.

Where to buy (UK)

UK Supplier	Midsummer Wholesale
UK Supplier	Heat Pump Central

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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.