Head to head
Mitsubishi Electric Ecodan PUZ-WM112VAA 11.2kW vs NIBE S2125 Model 12
The Mitsubishi Electric Ecodan PUZ-WM112VAA 11.2kW is a r32 monobloc air source heat pump, 11.2 kw heat output. The NIBE S2125 Model 12 is a air/water heat pump, up to 8.4 kw heat output.
Last reviewed 13 September 2026
Specifications side by side
| Mitsubishi Electric Ecodan PUZ-WM112VAA 11.2kW | NIBE S2125 Model 12 | |
|---|---|---|
| Heat output | 11.2 kW at -7C outdoor / 35C flow | 6.80-7.60 kW (average climate), 8.4 kW (cold climate) |
| SCOP | 4.78 (MCS, 35C flow), 3.34 (55C flow) | 5.0 at 35C, 3.8 at 55C (average climate); 4.2 at 35C, 3.4 at 55C (cold climate) |
| Sound power | 60 dBA | 49 dB(A) at nominal rating (EN12102) |
| Dimensions | 1020 x 1050 x 480 mm (H x W x D) | 1070 x 1130 x 820 mm (H x W x D) |
| Weight | 119 kg | 160 kg |
| Max flow temperature | 55C (space heating), 35C (combination heater) | up to 75C |
| Refrigerant | R32, 3.0 kg charge | - |
| Sound pressure at 1m | 45 dBA | - |
Sources: Mitsubishi Electric Ecodan PUZ-WM112VAA 11.2kW, NIBE S2125 Model 12. 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 S2125 Model 12 if...
The larger NIBE S2125, sized for a medium house and rated to hold output down to -25C outdoor temperature. It shares its cabinet size with the smaller model but weighs 10 kg more for the larger compressor.
Full S2125 Model 12 specifications →Common questions
What is the difference between the Mitsubishi Electric Ecodan PUZ-WM112VAA 11.2kW and the NIBE S2125 Model 12?
The Mitsubishi Electric Ecodan PUZ-WM112VAA 11.2kW is a r32 monobloc air source heat pump, 11.2 kW heat output; the NIBE S2125 Model 12 is a air/water heat pump, up to 8.4 kW heat output.
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