Includes Standard Horizontal Flue Kit & Timer DHW 14.7 litres/min 6.84-29.31 kW H 780mm x W 400mm x D 358mm For your convenience this product is a boiler, standard flue and timer as a bundled pack. This is more economical for you than purchasing the three items separately. You will not need to purchase the flue to complete the installation. Please note - this product has a 5 day lead time.