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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 5kWWorcester Bosch Greenstar 5800i AW 7kW
Heat output6.80 kW at 7/35C7.97 kW at 7/35C
SCOP4.53 (MCS, 35C flow)4.54 (MCS, 35C flow)
RefrigerantR290 (propane)R290 (propane)
Sound pressure42 dB(A)42 dB(A)
Dimensions800 x 1100 x 540 mm (H x W x D)800 x 1100 x 540 mm (H x W x D)
Weight143 kg143 kg
Max flow temperature75C75C

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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