Head to head
Ideal Heating Logic Max Combi C24 24kW vs Worcester Bosch Greenstar 4000 25kW combi
The Worcester Bosch Greenstar 4000 25kW combi runs 0.6 litres a minute more hot water and has 1kW more hot water output.
Last reviewed 13 September 2026
Key differences
- Hot water flow rate: the Worcester Bosch Greenstar 4000 25kW combi runs 0.6 litres a minute more hot water.
- Hot water output: the Worcester Bosch Greenstar 4000 25kW combi has 1kW more hot water output.
- Central heating output: the Worcester Bosch Greenstar 4000 25kW combi puts out 1kW more to the radiators.
Specifications side by side
| Ideal Heating Logic Max Combi C24 24kW | Worcester Bosch Greenstar 4000 25kW combi | |
|---|---|---|
| Hot water output | 24.2 kW | 25 kW |
| Central heating output | 24.2 kW | 25 kW |
| ErP class | A | A |
| Seasonal efficiency | 94% | 94% |
| Dimensions | 700 x 395 x 278 mm | 710 x 400 x 310 mm |
| Warranty | 10 years | 10 years |
| Hot water flow rate | 9.9 litres per minute | 10.5 litres per minute |
| Weight | - | 32.0 kg |
Sources: Ideal Heating Logic Max Combi C24 24kW, Worcester Bosch Greenstar 4000 25kW combi. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Logic Max Combi C24 24kW if...
A gas combi boiler with 24.2 kW of hot water output, sized for a flat or small house with one bathroom. It delivers about 9.9 litres per minute of hot water, which decides how well a shower runs while a tap is on. Warranty: 10 years. Seasonal efficiency is 94%.
Full Logic Max Combi C24 24kW specifications →Buy or hire the Greenstar 4000 25kW combi if...
- you want one that runs 0.6 litres a minute more hot water
- you want one that has 1kW more hot water output
- you want one that puts out 1kW more to the radiators
A gas combi boiler with 25 kW of hot water output, sized for a flat or small house with one bathroom. It delivers about 10.5 litres per minute of hot water, which decides how well a shower runs while a tap is on. Warranty: 10 years. Seasonal efficiency is 94%.
Full Greenstar 4000 25kW combi specifications →Common questions
What is the difference between the Ideal Heating Logic Max Combi C24 24kW and the Worcester Bosch Greenstar 4000 25kW combi?
The Worcester Bosch Greenstar 4000 25kW combi runs 0.6 litres a minute more hot water and has 1kW more hot water output. The Ideal Heating Logic Max Combi C24 24kW is a gas combi boiler, 24.2 kW hot water output; the Worcester Bosch Greenstar 4000 25kW combi is a gas combi boiler, 25 kW hot water output.
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