100% efficient means there is no loss of heat, reducing the amount you spend on running gas fires. Coal effect fuel bed with a stainless steel finish. No flue required. 100% Heat Efficiency Rotary Control Heat Output: 2.3kW 3 Year Manufacturer's Guarantee (T&Cs Apply) Brushed Finish Coal Effect Minimum Room Size: 27m³ Must be Fitted by a Gas Safe Registered Installer Flueless 100% Heat Efficiency Rotary Control Heat Output: 2.3kW 3 Year Manufacturer's Guarantee (T&Cs Apply) Brushed Finish Coal Effect Minimum Room Size: 27m³ Must be Fitted by a Gas Safe Registered Installer Flueless