Specifications Min. Efficiency 78% Max. CO emission 0.3% Wood Capacity 2.8kgs Output to room 14,400BTU (4kw) Flue Size: 150mm ú¿6ísú¬ Output to water 26,200BTU (7.5kw) Heating 5 - 6 radiators and 110 sqm Rear and Top flue outlets. 680mm(H)í-580mm(W)í-460mm(D) Net Weight 124kg.