Head to head
Daikin Altherma 3 H HT EPRA14DV3 vs Grant Aerona3 R32 17kW
The Daikin Altherma 3 H HT EPRA14DV3 is a r32 monobloc high-temperature air source heat pump, class 14. The Grant Aerona3 R32 17kW is a r32 inverter driven air source heat pump, 17 kw heat output.
Last reviewed 13 September 2026
Specifications side by side
| Daikin Altherma 3 H HT EPRA14DV3 | Grant Aerona3 R32 17kW | |
|---|---|---|
| Heat output | 10.17 kW (nominal heating) | 17 kW |
| SCOP | 4.51-4.71 (35C flow), 3.57-3.58 (55C flow) | 4.54 (35C flow), 3.57 (55C flow) |
| Refrigerant | R32, 4.2 kg charge | R32 |
| Dimensions | 990 x 1270 x 460 mm (H x W x D) (outdoor unit) | 1418 x 1024 x 403 mm (H x W x D) |
| Weight | 146 kg (single-phase) (outdoor unit) | 118 kg |
| Sound pressure | 43 dBA (heating) | - |
| Max flow temperature | 70C | - |
| Warranty | - | 7 years when installed by a Grant G1 accredited installer |
Sources: Daikin Altherma 3 H HT EPRA14DV3, Grant Aerona3 R32 17kW. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Altherma 3 H HT EPRA14DV3 if...
A high-temperature monobloc heat pump reaching a 70C flow, aimed squarely at replacing a boiler on an existing radiator system without upgrading radiators. Its class 14 size gives around 10.2kW of heat output, suiting a three or four-bed house.
Full Altherma 3 H HT EPRA14DV3 specifications →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 →Common questions
What is the difference between the Daikin Altherma 3 H HT EPRA14DV3 and the Grant Aerona3 R32 17kW?
The Daikin Altherma 3 H HT EPRA14DV3 is a r32 monobloc high-temperature air source heat pump, class 14; the Grant Aerona3 R32 17kW is a r32 inverter driven air source heat pump, 17 kW heat output.
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