Head to head
Grant Aerona3 R32 6kW vs Mitsubishi Electric Ecodan PUZ-WM112VAA 11.2kW
The Grant Aerona3 R32 6kW is a r32 inverter driven air source heat pump, 6 kw heat output. The Mitsubishi Electric Ecodan PUZ-WM112VAA 11.2kW is a r32 monobloc air source heat pump, 11.2 kw heat output.
Last reviewed 13 September 2026
Specifications side by side
| Grant Aerona3 R32 6kW | Mitsubishi Electric Ecodan PUZ-WM112VAA 11.2kW | |
|---|---|---|
| Heat output | 6 kW | 11.2 kW at -7C outdoor / 35C flow |
| SCOP | 4.61 (35C flow), 3.29 (55C flow) | 4.78 (MCS, 35C flow), 3.34 (55C flow) |
| Refrigerant | R32 | R32, 3.0 kg charge |
| Dimensions | 675 x 898 x 379.4 mm (H x W x D) | 1020 x 1050 x 480 mm (H x W x D) |
| Weight | 51 kg | 119 kg |
| Warranty | 7 years when installed by a Grant G1 accredited installer | - |
| Sound power | - | 60 dBA |
| Sound pressure at 1m | - | 45 dBA |
| Max flow temperature | - | 55C (space heating), 35C (combination heater) |
Sources: Grant Aerona3 R32 6kW, Mitsubishi Electric Ecodan PUZ-WM112VAA 11.2kW. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Aerona3 R32 6kW if...
A 6kW 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 6kW specifications →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 →Common questions
What is the difference between the Grant Aerona3 R32 6kW and the Mitsubishi Electric Ecodan PUZ-WM112VAA 11.2kW?
The Grant Aerona3 R32 6kW is a r32 inverter driven air source heat pump, 6 kW heat output; the Mitsubishi Electric Ecodan PUZ-WM112VAA 11.2kW is a r32 monobloc air source heat pump, 11.2 kW heat output.
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