HWAM 5530M Fresh Air System Ø100mm Rear Floor:Direct Air Needed Please see the installation guide Please see the installation guide for specific clearances Everything about the Miro 4 with stone cladding is designed to perform superbly from its perfectly balanced cast iron door that ensures a safe and secure room seal with the minimum of effort (all thanks to Wiking's patented closure mechanism) to the meticulously engineered and densely moulded vermiculite 6 piece fire chamber lining which improves heat retention and eliminates cold corners to maximise efficiency and minimise emissions Optional Additional Heat Storage Stones increasing weight by 137Kg the result is always the same: a stylish wood burning stove of a modern Danish design