The wall-mounted Worcester Bosch Greenstar 4000 System GR4700iW 21 S NG system boiler pack with flue offers an attractive design, improved installation and excellent performance. ErP A-rated for energy efficiency, this 21kW boiler includes an intuitive display panel for ease of use.
- Ease of installation SimpleSwitch to previous Worcester i System models with pre-piping jig offering rear piping as standard
- Flexibility of siting provided by long flue lengths (up to 12m with 60/100mm flues) and a 500ml integrated condensate siphon to reduce the risk of freezing
- Complete peace of mind for the end user with a 10-year heat exchanger and a 7-year product guarantee available as standard. Wide modulation range designed to optimise efficiency when heating demand is low
- High-end design, quiet operation (up to 42dB(A)) with an intuitive, long text, colour boiler display for ease of use
Web Pack Includes
141655 Worcester Bosch Greenstar 4000 system 21kW
100850 Worcester telescopic horizontal flue kit 100mm