Head to head
Mitsubishi Electric Ecodan PUZ-WM85VAA 8.5kW vs Viessmann Vitocal 150-A13
The Mitsubishi Electric Ecodan PUZ-WM85VAA 8.5kW is a r32 monobloc air source heat pump, 8.5 kw heat output. The Viessmann Vitocal 150-A13 is a r290 air source heat pump, 8.1 kw heat output.
Last reviewed 13 September 2026
Specifications side by side
| Mitsubishi Electric Ecodan PUZ-WM85VAA 8.5kW | Viessmann Vitocal 150-A13 | |
|---|---|---|
| Heat output | 8.5 kW at A-7/W35 | 8.1 kW at A7/W35 |
| Refrigerant | R32, 2.2 kg charge | R290 (propane), GWP 0.02 |
| Sound power | 58 dBA | 51 dB(A) assessed total at A7/W55 |
| Dimensions | 1020 x 1050 x 480 mm (H x W x D) | 920 x 450 x 360 mm (H x W x D) (indoor unit); 841 x 1144 x 600 mm (H x W x D, single fan) (outdoor unit) |
| Weight | 98 kg | 162 kg (single fan) (outdoor unit) |
| Max flow temperature | 55C (space heating) | 70C down to -10C outdoor |
| ErP rating | 145% (MCS certified) | - |
| Sound pressure at 1m | 45 dBA | - |
| COP | - | 4.7-5.0 at A7/W35 |
Sources: Mitsubishi Electric Ecodan PUZ-WM85VAA 8.5kW, Viessmann Vitocal 150-A13. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Ecodan PUZ-WM85VAA 8.5kW if...
An 8.5kW R32 monobloc heat pump, the middle unit in the Ecodan PUZ-WM line and a common size for a three-bed house. It runs on a single-phase 220-240V supply, weighs 98 kg and reaches a 55C flow temperature for radiator systems.
Full Ecodan PUZ-WM85VAA 8.5kW specifications →Buy or hire the Vitocal 150-A13 if...
A Vitocal 150-A monobloc-style split heat pump using the natural refrigerant R290, rated at 8.1kW and reaching a 70C flow for boiler-replacement work. Viessmann-trained installers can extend the standard warranty on registration.
Full Vitocal 150-A13 specifications →Common questions
What is the difference between the Mitsubishi Electric Ecodan PUZ-WM85VAA 8.5kW and the Viessmann Vitocal 150-A13?
The Mitsubishi Electric Ecodan PUZ-WM85VAA 8.5kW is a r32 monobloc air source heat pump, 8.5 kW heat output; the Viessmann Vitocal 150-A13 is a r290 air source heat pump, 8.1 kW heat output.
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