Head to head
Daikin Altherma 3 H HT EPRA16DV3 vs Grant Aerona3 R32 6kW
The Daikin Altherma 3 H HT EPRA16DV3 is a r32 monobloc high-temperature air source heat pump, class 16. The Grant Aerona3 R32 6kW is a r32 inverter driven air source heat pump, 6 kw heat output.
Last reviewed 13 September 2026
Specifications side by side
| Daikin Altherma 3 H HT EPRA16DV3 | Grant Aerona3 R32 6kW | |
|---|---|---|
| Heat output | 11.57-11.82 kW | 6 kW |
| SCOP | 4.51-4.71 (35C flow), 3.57-3.58 (55C flow) | 4.61 (35C flow), 3.29 (55C flow) |
| Refrigerant | R32, 4.2 kg charge | R32 |
| Dimensions | 990 x 1270 x 460 mm (H x W x D) (outdoor unit) | 675 x 898 x 379.4 mm (H x W x D) |
| Weight | 146 kg (single-phase) (outdoor unit) | 51 kg |
| Sound pressure | 38 dBA at 3m (standard mode), 35 dBA at 3m (low sound mode) | - |
| Max flow temperature | 70C | - |
| Warranty | - | 7 years when installed by a Grant G1 accredited installer |
Sources: Daikin Altherma 3 H HT EPRA16DV3, Grant Aerona3 R32 6kW. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Altherma 3 H HT EPRA16DV3 if...
The next size up in the Altherma 3 H HT range at around 11.7kW, still reaching a 70C flow for boiler-replacement jobs. It shares the same outdoor cabinet size and weight as the class 14 unit, so it suits a larger house without a larger footprint.
Full Altherma 3 H HT EPRA16DV3 specifications →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 →Common questions
What is the difference between the Daikin Altherma 3 H HT EPRA16DV3 and the Grant Aerona3 R32 6kW?
The Daikin Altherma 3 H HT EPRA16DV3 is a r32 monobloc high-temperature air source heat pump, class 16; the Grant Aerona3 R32 6kW is a r32 inverter driven air source heat pump, 6 kW heat output.
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