Mitsubishi Electric Ecodan R32 Monobloc (PUZ-HWM140YHA)

Specifications and technical data

Also known as: PUZ-HWM140YHA-BS

✓ BUS eligibleAir Source (ASHP)ResidentialR3214 kW

Manufacturer	Mitsubishi Electric
Model	Ecodan R32 Monobloc
Model code	PUZ-HWM140YHA
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	14 kW
Max heating output (low temp)	14 kW at A-7/W35
COP (heating)	2.45 at A-7/W35
SCOP (heating)	4.48 at W35
Operating range (air)	-28 to 35 °C
Electrical supply	380-415V (Three Phase)
Dimensions (H×W×D)	1350 × 1020 × 360 mm
Operational Weight	143 kg
Sound power level	67 dB(A) (Sound Power LW(A))
Data added	2026-09-24
Data source	Manufacturer documentation (Mitsubishi Electric)
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.	037-0035-20-03
MCS certification	✓ MCS listed
MCS certificate no.	037-0035-20-03; 037-0035-20-04

Free data sheet (PDF) →

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

Mitsubishi Electric Ecodan R32 PUZ-HWM140YHA, 14 kW air-to-water monobloc, R32. 14 kW at A-7/W35 with a COP of 2.45 - Mitsubishi rates this range at -7 C outdoor and states it holds full capacity in cold weather. SCOP 4.48 at W35 (A+++) and 3.35 at W55 (A++). Sound power 67 dB(A). Three-phase.

Where to buy (UK)

UK Supplier	The Heat Pump Warehouse
UK Supplier	Secon Renewables
UK Supplier	City Plumbing
UK Supplier	BHL
UK Supplier	Quality Heating

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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.

Reviews & further reading

Manufacturer Ecodan R32 Air Source Heat Pump — Mitsubishi Electric
Manufacturer Ecodan R32 Compact Air Source Heat Pump — Mitsubishi Electric
Review Mitsubishi Ecodan air source heat pump review — Federation of Master Builders
Covers the Ecodan range generally, not this specific R32 monobloc variant only.
Review Mitsubishi Ecodan 11.2kw R410a monobloc heat pump review — Homebuilding & Renovating
Long-term homeowner review (5 years on) of an earlier R410A Ecodan monobloc from the same range; written by Homebuilding's renewables expert David Hilton.