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Our rating: 4/5
Efficiency rating: 90.1%*
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Worcester-Bosch Greenstar 12i System
The Worcester-Bosch Greenstar 12i System boiler delivers high energy efficiency – in fact 90.1% energy efficiency – by employing a robust aluminium-silicon heat exchanger exclusive to Worcester-Bosch. The extra large surface area of the heat exchanger allows exhaust gases to cool, to around 55°C, such that the latent heat contained in them can be used effectively rather than disappearing out of the boiler flue. This ability to extract as much useful heat as possible from each unit of gas consumed is what allows the Worcester-Bosch Greenstar 12i System to operate so efficiently. In doing so the Worcester-Bosch Greenstar 12i System also helps to reduce the amount of carbon dioxide (CO2) gas – the main contributor to global warming – released into the atmosphere.
The Worcester-Bosch Greenstar 12i System boiler requires a hot water storage cylinder but all the other major components – expansion vessel, circulating pump, etc. – are built in to the boiler unit itself and are wired, plumbed as well as tested as a system. This allows the appliance to be efficient, reliable and easy to install.
Key product features of the Worcester-Bosch Greenstar 12i System include:
- Maximum 12kW output for domestic hot water and central heating
- Low carbon dioxide (CO2) and nitrogen oxide (NOx) emissions
- SEDBUK ("Seasonal Efficiency for Domestic Boilers") "A" rated for energy efficiency
- Compact dimensions (H710mm x W400 x D300mm) and light weight (27kg) allow flexible siting
- Vertical and horizontal fluing options, in 100mmm and 125mm diameters, up to 15 metres
- 2 year warranty on parts and labour 10 year warranty on primary heat exchanger
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* When review applies to a range of Boilers, efficiency applies to best model in range. Always check with manufacturer.