Fireplace insert hot air furnace chimney stove series la nordica focolare power type ambient air dependent heating power 94 kw efficiency 79 maximum room size 269 m flue connection top flue connection diameter 160 mm energy sources wood firewood electric ignition design 1 multiple flue connections safety feature self closing door combustion chamber cast iron height 1085 cm width 609 cm weight 125 kg pane for fireplace flat pane