Boiler is compatible with long flue lengths (up to 12m with 60/100mm flues) for flexibility of siting and includes a 500ml integrated condensate siphon to reduce the risk of freezing, together with features of the existing Greenstar i. Pre-piping jig with rear piping as standard enables SimpleSwitch to previous Worcester i system models. Fast and easy installation, commissioning and servicing. Max. Central Heating Output: 18kW Aluminium Silicon Heat Exchanger Top Flue Outlet Compatible with Unvented Indirect Cylinders & Twin Coil Cylinders for Solar Compatibility Compatible with Solar Panels 5 Year Manufacturers Guarantee (Registration Required, T&Cs Apply) 61418.556BTU Backlit LCD Full Colour Display Max. Central Heating Output: 18kW Aluminium Silicon Heat Exchanger Top Flue Outlet Compatible with Unvented Indirect Cylinders & Twin Coil Cylinders for Solar Compatibility Compatible with Solar Panels 5 Year Manufacturers Guarantee (Registration Required, T&Cs Apply) 61418.556BTU Ba...