Head to head
Mitsubishi Electric Ecodan PUZ-WM112VAA 11.2kW vs Vaillant aroTHERM plus 5kW
The Mitsubishi Electric Ecodan PUZ-WM112VAA 11.2kW is a r32 monobloc air source heat pump, 11.2 kw heat output. The Vaillant aroTHERM plus 5kW is a r290 monobloc air source heat pump, 5 kw heat output.
Last reviewed 13 September 2026
Specifications side by side
| Mitsubishi Electric Ecodan PUZ-WM112VAA 11.2kW | Vaillant aroTHERM plus 5kW | |
|---|---|---|
| Heat output | 11.2 kW at -7C outdoor / 35C flow | 5 kW |
| SCOP | 4.78 (MCS, 35C flow), 3.34 (55C flow) | up to 5.03 |
| Refrigerant | R32, 3.0 kg charge | R290 (propane), low GWP |
| Sound power | 60 dBA | 53 dB(A) at A7/W35, 58 dB(A) at A7/W55 |
| Dimensions | 1020 x 1050 x 480 mm (H x W x D) | 965 x 1100 x 450 mm (H x W x D) |
| Weight | 119 kg | 128 kg (operating) |
| Max flow temperature | 55C (space heating), 35C (combination heater) | 75C |
| Sound pressure at 1m | 45 dBA | - |
Sources: Mitsubishi Electric Ecodan PUZ-WM112VAA 11.2kW, Vaillant aroTHERM plus 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 aroTHERM plus 5kW if...
The smallest aroTHERM plus, sized for a well-insulated flat or small house. It uses the natural refrigerant R290 rather than an F-gas, and reaches a 75C flow temperature, which helps it work with existing radiators on a retrofit job.
Full aroTHERM plus 5kW specifications →Common questions
What is the difference between the Mitsubishi Electric Ecodan PUZ-WM112VAA 11.2kW and the Vaillant aroTHERM plus 5kW?
The Mitsubishi Electric Ecodan PUZ-WM112VAA 11.2kW is a r32 monobloc air source heat pump, 11.2 kW heat output; the Vaillant aroTHERM plus 5kW is a r290 monobloc air source heat pump, 5 kW heat output.
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