Head to head
Vaillant aroTHERM plus 7kW vs Worcester Bosch Greenstar 5800i AW 7kW
The Vaillant aroTHERM plus 7kW is a r290 monobloc air source heat pump, 7 kw heat output. The Worcester Bosch Greenstar 5800i AW 7kW is a r290 monobloc air source heat pump, 7.97 kw heat output.
Last reviewed 13 September 2026
Specifications side by side
| Vaillant aroTHERM plus 7kW | Worcester Bosch Greenstar 5800i AW 7kW | |
|---|---|---|
| Heat output | 7 kW | 7.97 kW at 7/35C |
| SCOP | up to 5.03 | 4.54 (MCS, 35C flow) |
| Refrigerant | R290 (propane), low GWP | R290 (propane) |
| Dimensions | 1565 x 1100 x 450 mm (H x W x D) | 800 x 1100 x 540 mm (H x W x D) |
| Weight | 194 kg (operating) | 143 kg |
| Max flow temperature | 75C | 75C |
| Sound power | 58 dB(A) at A7/W35, 60 dB(A) at A7/W55 | - |
| Sound pressure | - | 42 dB(A) |
Sources: Vaillant aroTHERM plus 7kW, Worcester Bosch Greenstar 5800i AW 7kW. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the aroTHERM plus 7kW if...
A mid-size aroTHERM plus for a typical three-bed house. It is taller and heavier than the 5kW unit, reflecting a larger outdoor cabinet, and shares the same R290 refrigerant and 75C maximum flow temperature.
Full aroTHERM plus 7kW specifications →Buy or hire the Greenstar 5800i AW 7kW if...
The larger 5800i AW unit, for a slightly bigger house than the 5kW model while sharing the same cabinet size and 42 dB(A) sound rating. Its R290 refrigerant and 75C flow temperature suit a radiator-based retrofit.
Full Greenstar 5800i AW 7kW specifications →Common questions
What is the difference between the Vaillant aroTHERM plus 7kW and the Worcester Bosch Greenstar 5800i AW 7kW?
The Vaillant aroTHERM plus 7kW is a r290 monobloc air source heat pump, 7 kW heat output; the Worcester Bosch Greenstar 5800i AW 7kW is a r290 monobloc air source heat pump, 7.97 kW heat output.
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