Head to head
Grant Aerona3 R32 10kW vs Worcester Bosch Greenstar 5800i AW 5kW
The Grant Aerona3 R32 10kW is a r32 inverter driven 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
| Grant Aerona3 R32 10kW | Worcester Bosch Greenstar 5800i AW 5kW | |
|---|---|---|
| Heat output | 10 kW | 6.80 kW at 7/35C |
| SCOP | 5.20 (35C flow), 3.47 (55C flow) | 4.53 (MCS, 35C flow) |
| Refrigerant | R32 | R290 (propane) |
| Dimensions | 882 x 874 x 405 mm (H x W x D) | 800 x 1100 x 540 mm (H x W x D) |
| Weight | 70 kg | 143 kg |
| Warranty | 7 years when installed by a Grant G1 accredited installer | - |
| Sound pressure | - | 42 dB(A) |
| Max flow temperature | - | 75C |
Sources: Grant Aerona3 R32 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 Aerona3 R32 10kW if...
A 10kW R32 inverter driven heat pump from Grant's Aerona3 range, a common choice for off-gas-grid homes that previously ran an oil boiler. It carries a 7 year warranty through Grant's G1 installer scheme, one of the longer standard terms in this category.
Full Aerona3 R32 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 Grant Aerona3 R32 10kW and the Worcester Bosch Greenstar 5800i AW 5kW?
The Grant Aerona3 R32 10kW is a r32 inverter driven 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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