The Worcester 87161157410 Heat Exchanger is a stainless steel storage tank water heater that operates on gas. It is designed for wall mounting and is compatible with smart home systems such as Iris and Siri. The heat exchanger is part of a boiler heating system and is ideal for efficiently heating water in residential or commercial settings. Its green colour adds an aesthetic touch to any home or building. Worcester, a trusted brand in heating and plumbing, ensures quality and reliability in this product.