DEFRA Approved - Up to 4.5kW Heat Output. This DEFRA Approved Stove has a capacity of up to 4.5kW output and can be fuelled by multiple sources such as Wood, Charcoal and Smokeless Fuel. This Multi-Fuel stove also has the option of placing the flue at either the top of the stove or at the rear depending on your building layout and personal preferences.