Head to head
Grant Aerona3 R32 17kW vs Mitsubishi Electric Ecodan PUZ-WM85VAA 8.5kW
The Grant Aerona3 R32 17kW is a r32 inverter driven air source heat pump, 17 kw heat output. The Mitsubishi Electric Ecodan PUZ-WM85VAA 8.5kW is a r32 monobloc air source heat pump, 8.5 kw heat output.
Last reviewed 13 September 2026
Specifications side by side
| Grant Aerona3 R32 17kW | Mitsubishi Electric Ecodan PUZ-WM85VAA 8.5kW | |
|---|---|---|
| Heat output | 17 kW | 8.5 kW at A-7/W35 |
| Refrigerant | R32 | R32, 2.2 kg charge |
| Dimensions | 1418 x 1024 x 403 mm (H x W x D) | 1020 x 1050 x 480 mm (H x W x D) |
| Weight | 118 kg | 98 kg |
| SCOP | 4.54 (35C flow), 3.57 (55C flow) | - |
| Warranty | 7 years when installed by a Grant G1 accredited installer | - |
| ErP rating | - | 145% (MCS certified) |
| Sound power | - | 58 dBA |
| Sound pressure at 1m | - | 45 dBA |
| Max flow temperature | - | 55C (space heating) |
Sources: Grant Aerona3 R32 17kW, Mitsubishi Electric Ecodan PUZ-WM85VAA 8.5kW. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Aerona3 R32 17kW if...
A 17kW R32 inverter driven heat pump from Grant's Aerona3 range, a common choice for off-gas-grid homes that previously ran an oil boiler. It carries a 7 year warranty through Grant's G1 installer scheme, one of the longer standard terms in this category.
Full Aerona3 R32 17kW specifications →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 →Common questions
What is the difference between the Grant Aerona3 R32 17kW and the Mitsubishi Electric Ecodan PUZ-WM85VAA 8.5kW?
The Grant Aerona3 R32 17kW is a r32 inverter driven air source heat pump, 17 kW heat output; the Mitsubishi Electric Ecodan PUZ-WM85VAA 8.5kW is a r32 monobloc air source heat pump, 8.5 kW heat output.
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