Head to head
Mitsubishi Electric Ecodan PUZ-WM112VAA 11.2kW vs Viessmann Vitodens 100-W 35kW combi
The Mitsubishi Electric Ecodan PUZ-WM112VAA 11.2kW is a r32 monobloc air source heat pump, 11.2 kw heat output. The Viessmann Vitodens 100-W 35kW combi is a gas combi boiler, 34.9 kw hot water output.
Last reviewed 13 September 2026
Specifications side by side
| Mitsubishi Electric Ecodan PUZ-WM112VAA 11.2kW | Viessmann Vitodens 100-W 35kW combi | |
|---|---|---|
| Dimensions | 1020 x 1050 x 480 mm (H x W x D) | 700 x 400 x 360 mm |
| Weight | 119 kg | 35 kg |
| Heat output | 11.2 kW at -7C outdoor / 35C flow | - |
| SCOP | 4.78 (MCS, 35C flow), 3.34 (55C flow) | - |
| Refrigerant | R32, 3.0 kg charge | - |
| Sound power | 60 dBA | - |
| Sound pressure at 1m | 45 dBA | - |
| Max flow temperature | 55C (space heating), 35C (combination heater) | - |
| Hot water output | - | 34.9 kW |
| Central heating output | - | 32 kW |
| ErP class | - | A |
| Seasonal efficiency | - | 98% |
| Warranty | - | 5 years |
| Hot water flow rate | - | 17 litres per minute |
Sources: Mitsubishi Electric Ecodan PUZ-WM112VAA 11.2kW, Viessmann Vitodens 100-W 35kW combi. 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 Vitodens 100-W 35kW combi if...
A gas combi boiler with 34.9 kW of hot water output, sized for a larger house with two bathrooms. It delivers about 17 litres per minute of hot water, which decides how well a shower runs while a tap is on. Warranty: 5 years. Seasonal efficiency is 98%.
Full Vitodens 100-W 35kW combi specifications →Common questions
What is the difference between the Mitsubishi Electric Ecodan PUZ-WM112VAA 11.2kW and the Viessmann Vitodens 100-W 35kW combi?
The Mitsubishi Electric Ecodan PUZ-WM112VAA 11.2kW is a r32 monobloc air source heat pump, 11.2 kW heat output; the Viessmann Vitodens 100-W 35kW combi is a gas combi boiler, 34.9 kW hot water output.
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