Head to head
Mitsubishi Electric Ecodan PUZ-WM112VAA 11.2kW vs Worcester Bosch Greenstar 5800i AW 5kW
The Mitsubishi Electric Ecodan PUZ-WM112VAA 11.2kW is a r32 monobloc air source heat pump, 11.2 kw heat output. The Worcester Bosch Greenstar 5800i AW 5kW is a r290 monobloc air source heat pump, 6.80 kw heat output.
Last reviewed 13 September 2026
Specifications side by side
| Mitsubishi Electric Ecodan PUZ-WM112VAA 11.2kW | Worcester Bosch Greenstar 5800i AW 5kW | |
|---|---|---|
| Heat output | 11.2 kW at -7C outdoor / 35C flow | 6.80 kW at 7/35C |
| SCOP | 4.78 (MCS, 35C flow), 3.34 (55C flow) | 4.53 (MCS, 35C flow) |
| Refrigerant | R32, 3.0 kg charge | R290 (propane) |
| Dimensions | 1020 x 1050 x 480 mm (H x W x D) | 800 x 1100 x 540 mm (H x W x D) |
| Weight | 119 kg | 143 kg |
| Max flow temperature | 55C (space heating), 35C (combination heater) | 75C |
| Sound power | 60 dBA | - |
| Sound pressure at 1m | 45 dBA | - |
| Sound pressure | - | 42 dB(A) |
Sources: Mitsubishi Electric Ecodan PUZ-WM112VAA 11.2kW, Worcester Bosch Greenstar 5800i AW 5kW. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Ecodan PUZ-WM112VAA 11.2kW if...
The largest domestic unit in the Ecodan PUZ-WM range at 11.2kW, sized for a larger house or one with a higher heat loss. Its SCOP of 4.78 at a 35C flow is among the higher MCS-rated figures in this range, and it weighs 119 kg against 98 kg for the smaller units.
Full Ecodan PUZ-WM112VAA 11.2kW specifications →Buy or hire the Greenstar 5800i AW 5kW if...
Worcester Bosch's entry-size 5800i AW, using the natural refrigerant R290 and reaching a 75C flow temperature for existing radiator systems. It is marketed as one of the quieter units in this size at 42 dB(A) sound pressure.
Full Greenstar 5800i AW 5kW specifications →Common questions
What is the difference between the Mitsubishi Electric Ecodan PUZ-WM112VAA 11.2kW and the Worcester Bosch Greenstar 5800i AW 5kW?
The Mitsubishi Electric Ecodan PUZ-WM112VAA 11.2kW is a r32 monobloc air source heat pump, 11.2 kW heat output; the Worcester Bosch Greenstar 5800i AW 5kW is a r290 monobloc air source heat pump, 6.80 kW heat output.
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