Warmflow ZENO A-Series R32 (7–20 kW)

Specifications and technical data

✓ BUS eligibleAir Source (ASHP)ResidentialR327–20 kW

Manufacturer	Warmflow
Model	ZENO A-Series R32
Model code	AS03-R32
Heat pump type	Air Source (ASHP) All Air Source heat pumps →
Application	Residential All Residential heat pumps →
Refrigerant	R32 All R32 heat pumps →
Mode	Heating only
Heating capacity	7–20 kW
COP (heating)	4.67 at A7/W35
Operating range (air)	-25 to 52 °C
Heating flow temperature	20–65 °C
Electrical supply	220-240V (Single Phase)
Dimensions (H×W×D)	1315 × 997 × 437 mm
Operational Weight	140 kg
Sound power level	55 dB(A) (Sound Power LW(A))
Data added	2026-10-21
Data source	Warmflow ZENO R32 air source heat pump manual
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.	BSI KM 612798/8
MCS certification	✓ MCS listed
MCS certificate no.	BSI KM 612798/8

Free data sheet (PDF) →

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

Warmflow ZENO AS03-R32 R32 variable-speed air-to-water monobloc heat pump, 7-20 kW, flow up to 65 °C, operation down to -25 °C, single-phase 230 V.

Where to buy (UK)

UK Supplier	Plumbnation
UK Supplier	Inspired Heating
UK Supplier	Wolseley
UK Supplier	City Plumbing
UK Supplier	HVAC-Sanitary

✎ Suggest a correction to this data

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