Head to head
Daikin Altherma 3 H HT EPRA14DV3 vs Worcester Bosch Greenstar 5800i AW 5kW
The Daikin Altherma 3 H HT EPRA14DV3 is a r32 monobloc high-temperature air source heat pump, class 14. The Worcester Bosch Greenstar 5800i AW 5kW is a r290 monobloc air source heat pump, 6.80 kw heat output.
Last reviewed 13 September 2026
Specifications side by side
| Daikin Altherma 3 H HT EPRA14DV3 | Worcester Bosch Greenstar 5800i AW 5kW | |
|---|---|---|
| Heat output | 10.17 kW (nominal heating) | 6.80 kW at 7/35C |
| SCOP | 4.51-4.71 (35C flow), 3.57-3.58 (55C flow) | 4.53 (MCS, 35C flow) |
| Refrigerant | R32, 4.2 kg charge | R290 (propane) |
| Sound pressure | 43 dBA (heating) | 42 dB(A) |
| Dimensions | 990 x 1270 x 460 mm (H x W x D) (outdoor unit) | 800 x 1100 x 540 mm (H x W x D) |
| Weight | 146 kg (single-phase) (outdoor unit) | 143 kg |
| Max flow temperature | 70C | 75C |
Sources: Daikin Altherma 3 H HT EPRA14DV3, Worcester Bosch Greenstar 5800i AW 5kW. 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 Greenstar 5800i AW 5kW if...
Worcester Bosch's entry-size 5800i AW, using the natural refrigerant R290 and reaching a 75C flow temperature for existing radiator systems. It is marketed as one of the quieter units in this size at 42 dB(A) sound pressure.
Full Greenstar 5800i AW 5kW specifications →Common questions
What is the difference between the Daikin Altherma 3 H HT EPRA14DV3 and the Worcester Bosch Greenstar 5800i AW 5kW?
The Daikin Altherma 3 H HT EPRA14DV3 is a r32 monobloc high-temperature air source heat pump, class 14; the Worcester Bosch Greenstar 5800i AW 5kW is a r290 monobloc air source heat pump, 6.80 kW heat output.
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