Head to head
Grant Aerona3 R32 10kW vs Worcester Bosch Greenstar 2000 30kW combi
The Grant Aerona3 R32 10kW is a r32 inverter driven air source heat pump, 10 kw heat output. The Worcester Bosch Greenstar 2000 30kW combi is a gas combi boiler, 30 kw hot water output.
Last reviewed 13 September 2026
Specifications side by side
| Grant Aerona3 R32 10kW | Worcester Bosch Greenstar 2000 30kW combi | |
|---|---|---|
| Dimensions | 882 x 874 x 405 mm (H x W x D) | 724 x 400 x 300 mm |
| Weight | 70 kg | 32.1 kg |
| Warranty | 7 years when installed by a Grant G1 accredited installer | 7 years when installed with Greenstar System Filter |
| Heat output | 10 kW | - |
| SCOP | 5.20 (35C flow), 3.47 (55C flow) | - |
| Refrigerant | R32 | - |
| Hot water output | - | 30 kW |
| Central heating output | - | 3-24 kW |
| ErP class | - | A |
| Seasonal efficiency | - | 94% |
| Hot water flow rate | - | 12 litres per minute at 35 C rise |
Sources: Grant Aerona3 R32 10kW, Worcester Bosch Greenstar 2000 30kW combi. 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 2000 30kW combi if...
A gas combi boiler with 30 kW of hot water output, sized for a three-bed house with one or two bathrooms. It delivers about 12 litres per minute at 35 C rise of hot water, which decides how well a shower runs while a tap is on. Warranty: 7 years when installed with Greenstar System Filter. Seasonal efficiency is 94%.
Full Greenstar 2000 30kW combi specifications →Common questions
What is the difference between the Grant Aerona3 R32 10kW and the Worcester Bosch Greenstar 2000 30kW combi?
The Grant Aerona3 R32 10kW is a r32 inverter driven air source heat pump, 10 kW heat output; the Worcester Bosch Greenstar 2000 30kW combi is a gas combi boiler, 30 kW hot water output.
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