Head to head
Worcester Bosch Greenstar 5800i AW 5kW vs Worcester Bosch Greenstar 5800i AW 7kW
The Worcester Bosch Greenstar 5800i AW 5kW is a r290 monobloc air source heat pump, 6.80 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
| Worcester Bosch Greenstar 5800i AW 5kW | Worcester Bosch Greenstar 5800i AW 7kW | |
|---|---|---|
| Heat output | 6.80 kW at 7/35C | 7.97 kW at 7/35C |
| SCOP | 4.53 (MCS, 35C flow) | 4.54 (MCS, 35C flow) |
| Refrigerant | R290 (propane) | R290 (propane) |
| Sound pressure | 42 dB(A) | 42 dB(A) |
| Dimensions | 800 x 1100 x 540 mm (H x W x D) | 800 x 1100 x 540 mm (H x W x D) |
| Weight | 143 kg | 143 kg |
| Max flow temperature | 75C | 75C |
Sources: Worcester Bosch Greenstar 5800i AW 5kW, 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 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 →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 Worcester Bosch Greenstar 5800i AW 5kW and the Worcester Bosch Greenstar 5800i AW 7kW?
The Worcester Bosch Greenstar 5800i AW 5kW is a r290 monobloc air source heat pump, 6.80 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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