The Worcester Greenstar 9i System ERP Boiler Fan Assembly 8716117417 is a gas-powered storage tank water heater with a heating system that operates through a boiler. Manufactured in 2012, this model from Worcester features a compact design in a black colour. It has an amperage of 36 A and is part of the Greenstar product line. This fan assembly is specifically designed for the Worcester Greenstar 9i System ERP Boiler.