Head to head
Vaillant ecoTEC plus 832 32kW combi vs Worcester Bosch Greenstar 4000 30kW combi
The Worcester Bosch Greenstar 4000 30kW combi puts out 4kW more to the radiators. The Vaillant ecoTEC plus 832 32kW combi has 2kW more hot water output and runs 0.7 litres a minute more hot water.
Last reviewed 13 September 2026
Key differences
- Central heating output: the Worcester Bosch Greenstar 4000 30kW combi puts out 4kW more to the radiators.
- Hot water output: the Vaillant ecoTEC plus 832 32kW combi has 2kW more hot water output.
- Hot water flow rate: the Vaillant ecoTEC plus 832 32kW combi runs 0.7 litres a minute more hot water.
Specifications side by side
| Vaillant ecoTEC plus 832 32kW combi | Worcester Bosch Greenstar 4000 30kW combi | |
|---|---|---|
| Hot water output | 31.8 kW | 30 kW |
| Central heating output | 26.4 kW | 30 kW |
| ErP class | A | A |
| Seasonal efficiency | 94% | 94% |
| Dimensions | 720 x 440 x 372 mm | 710 x 400 x 310 mm |
| Weight | 37 kg | 32.3 kg |
| Warranty | 10 years with Vaillant Advance Boiler Protection Kit | 10 years |
| Hot water flow rate | 13 litres per minute | 12.3 litres per minute |
Sources: Vaillant ecoTEC plus 832 32kW combi, Worcester Bosch Greenstar 4000 30kW combi. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the ecoTEC plus 832 32kW combi if...
- you want one that has 2kW more hot water output
- you want one that runs 0.7 litres a minute more hot water
A gas combi boiler with 31.8 kW of hot water output, sized for a three-bed house with one or two bathrooms. It delivers about 13 litres per minute of hot water, which decides how well a shower runs while a tap is on. Warranty: 10 years with Vaillant Advance Boiler Protection Kit. Seasonal efficiency is 94%.
Full ecoTEC plus 832 32kW combi specifications →Buy or hire the Greenstar 4000 30kW combi if...
- you want one that puts out 4kW more to the radiators
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 12.3 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 30kW combi specifications →Common questions
What is the difference between the Vaillant ecoTEC plus 832 32kW combi and the Worcester Bosch Greenstar 4000 30kW combi?
The Worcester Bosch Greenstar 4000 30kW combi puts out 4kW more to the radiators. The Vaillant ecoTEC plus 832 32kW combi has 2kW more hot water output and runs 0.7 litres a minute more hot water. The Vaillant ecoTEC plus 832 32kW combi is a gas combi boiler, 31.8 kW hot water output; the Worcester Bosch Greenstar 4000 30kW combi is a gas combi boiler, 30 kW hot water output.
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