Mitsubishi Ecodan Heat Pump Range
Mitsubishi Ecodan UK heat pump. R32 PUZ-WM and R290 PUZ-WZ monobloc ranges, 5–14 kW. Quiet Mark since 2012; UK-built; 5–7 yr warranty via AEI.
4.5 / 5
Outstanding
Strengths
- Quiet Mark certified across both R32 and R290 ranges since 2012 — strongest acoustic position of any UK heat pump brand, with Ultra Quiet 8.5 kW at 45 dB(A) at 1 m
- UK-manufactured in Livingston, Scotland — short replacement-parts supply chain and the most robust supply-chain story among major UK heat pump brands
- Largest UK installer network by installed-base — best price competition through the AEI scheme and lowest commissioning-quality risk in most regions
Watch outs
- Standard warranty is 3 years; extended 5–7 year cover requires installation by an Accredited Ecodan Installer (AEI) — shorter than Worcester Bosch's 12-year ceiling and Aira's 15-year subscription bundle
- Pre-grant pricing (£9,000–£14,000) is mid-premium and consistently above Octopus Cosy 6 — the brand commands a price floor that the installer network's pricing power reinforces
- R290 AEI installer pool is smaller and still growing — lead times on R290 installs in some regions are noticeably longer than the equivalent R32 install
£9,000
Typical price — check Mitsubishi Ecodan Accredited Installer for live pricing.
- R32 range (PUZ-WM) WM50 (5 kW), WM60 (6 kW), WM85 (8.5 kW), HWM140V (14 kW)
- R290 range (PUZ-WZ) WZ50 (5 kW), WZ60 (6 kW), WZ85 (8.5 kW), WZ100 (10 kW), WZ120 (12 kW)
- Maximum flow temperature Up to 75°C (R290 range)
- SCOP at 55°C flow (R32) WM50 3.22, WM60 3.56, WM85 3.47
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By Editorial team2 min read
- R32 range (PUZ-WM)
- WM50 (5 kW), WM60 (6 kW), WM85 (8.5 kW), HWM140V (14 kW)
- R290 range (PUZ-WZ)
- WZ50 (5 kW), WZ60 (6 kW), WZ85 (8.5 kW), WZ100 (10 kW), WZ120 (12 kW)
- Maximum flow temperature
- Up to 75°C (R290 range)
- SCOP at 55°C flow (R32)
- WM50 3.22, WM60 3.56, WM85 3.47
- Energy class (R290 at 35°C)
- A+++
- Operating range (R290)
- Down to −25°C ambient
- Refrigerant
- R32 (GWP 675) on PUZ-WM; R290 propane (GWP 3) on PUZ-WZ
- Sound pressure (Ultra Quiet 8.5 kW)
- 45 dB(A) at 1 m
- Sound power (Ultra Quiet 8.5 kW)
- 58 dB(A)
- Acoustic certification
- Quiet Mark — Noise Abatement Society (since 2012)
- Manufactured in
- Livingston, Scotland (UK-built)
- MCS approval
- Listed under Mitsubishi Electric in MCS product database
- Control platform
- MELCloud — connected weather compensation + remote monitoring
- Coastal protection variants
- Available across the R290 range