PowerFlue Chimney Exhaust Fans for Wood stoves and other closed solid fuel appliances up to 25kw. Designed and manufactured in the UK. The spigot is bolted to the underside of the fan unit. The spigot (approximately 6”-15cm long) goes down inside the chimney holding it in place. 230volt models are supplied with 20 metres of 3-core cable and a fan speed control. Simple and fast to install.