Head to head
Vaillant aroTHERM plus 10kW vs Worcester Bosch Greenstar 5800i AW 5kW
The Vaillant aroTHERM plus 10kW is a r290 monobloc air source heat pump, 10 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 10kW | Worcester Bosch Greenstar 5800i AW 5kW | |
|---|---|---|
| Heat output | 10 kW | 6.80 kW at 7/35C |
| SCOP | up to 5.03 | 4.53 (MCS, 35C flow) |
| Refrigerant | R290 (propane), low GWP | R290 (propane) |
| Max flow temperature | 75C | 75C |
| Sound pressure | - | 42 dB(A) |
| Dimensions | - | 800 x 1100 x 540 mm (H x W x D) |
| Weight | - | 143 kg |
Sources: Vaillant aroTHERM plus 10kW, 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 10kW if...
The larger aroTHERM plus, sized for a bigger house with a higher heat loss. It keeps the same R290 refrigerant and 75C maximum flow temperature as the smaller units in the range, so it can usually work with existing radiators.
Full aroTHERM plus 10kW 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 10kW and the Worcester Bosch Greenstar 5800i AW 5kW?
The Vaillant aroTHERM plus 10kW is a r290 monobloc air source heat pump, 10 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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