Head to head
Telford Tempest 300 Indirect vs Worcester Bosch Greenstar 2000 25kW combi
The Worcester Bosch Greenstar 2000 25kW combi comes with 5 years more warranty.
Last reviewed 13 September 2026
Key differences
- Warranty: the Worcester Bosch Greenstar 2000 25kW combi comes with 5 years more warranty.
Specifications side by side
| Telford Tempest 300 Indirect | Worcester Bosch Greenstar 2000 25kW combi | |
|---|---|---|
| Dimensions | 1750 mm high x 580 mm diameter | 724 x 400 x 300 mm |
| Weight | 61 kg | 32.1 kg |
| Warranty | Lifetime guarantee on the body with annual service, 2 year component guarantee | 7 years when installed with Greenstar System Filter |
| Capacity | 300 litres | - |
| Material | 2304 duplex stainless steel | - |
| Relief valve setting | 7 bar / 90C | - |
| Immersion heater | 3kW, 240V single phase, included | - |
| Hot water output | - | 25 kW |
| Central heating output | - | 3-24 kW |
| ErP class | - | A |
| Seasonal efficiency | - | 94% |
| Hot water flow rate | - | 10 litres per minute at 35 C rise |
Sources: Telford Tempest 300 Indirect, Worcester Bosch Greenstar 2000 25kW combi. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Tempest 300 Indirect if...
A 300 litre indirect cylinder for a larger household or a property with high simultaneous hot water demand, part of Telford's Tempest range. Like the smaller direct model it carries a lifetime body guarantee when serviced annually.
Full Tempest 300 Indirect specifications →Buy or hire the Greenstar 2000 25kW combi if...
- you want one that comes with 5 years more warranty
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 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 25kW combi specifications →Common questions
What is the difference between the Telford Tempest 300 Indirect and the Worcester Bosch Greenstar 2000 25kW combi?
The Worcester Bosch Greenstar 2000 25kW combi comes with 5 years more warranty. The Telford Tempest 300 Indirect is a indirect unvented hot water cylinder, 300 litres; the Worcester Bosch Greenstar 2000 25kW combi is a gas combi boiler, 25 kW hot water output.
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