Head to head
Vaillant aroTHERM plus 7kW vs Worcester Bosch Greenstar 5800i AW 5kW
The Vaillant aroTHERM plus 7kW is a r290 monobloc air source heat pump, 7 kw heat output. 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
| Vaillant aroTHERM plus 7kW | Worcester Bosch Greenstar 5800i AW 5kW | |
|---|---|---|
| Heat output | 7 kW | 6.80 kW at 7/35C |
| SCOP | up to 5.03 | 4.53 (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 5kW. 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 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 Vaillant aroTHERM plus 7kW and the Worcester Bosch Greenstar 5800i AW 5kW?
The Vaillant aroTHERM plus 7kW is a r290 monobloc air source heat pump, 7 kW heat output; the Worcester Bosch Greenstar 5800i AW 5kW is a r290 monobloc air source heat pump, 6.80 kW heat output.
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