Part no 0020219517 This fixed, non-telescopic, horizontal flue kit for all Vaillant ecoTEC boilers is used to install a flue through the wall to the rear, left or right of the boiler. Non-corrosive, the flue kit has been designed to withstand the acidic gases that condensate boilers expel, creating a system that will last the life of the boiler. Simple to install, the kit is comprised of push-fit connections and positive screw fixings. The kit consists of the horizontal air duct, flue corner, 60mm air duct clamp, 30mm air duct clamp, internal trim ring and external wall seal. Suitable for use with Vaillant Ecotec boiler range Easy to install Quality product Effective disposal of acidic gases Easy to use