The Worcester Bosch Telescopic Horizontal Long Flue is a compact storage tank water heater designed for indoor use. With a power source of gas, this boiler offers energy efficiency at an A+++ rating. The metal tank lining and telescopic design make installation convenient, while the brand reputation ensures quality and reliability in heating systems. Ideal for replacing outdated or inefficient water heaters, this product provides a reliable and efficient solution for your hot water needs.