Loughrigg 5kwWood burning stove, 4. 9kW ECODesign 2022, Smoke Control Area Exempt, 82. 7% Efficient, A+ Energy Rating, 18% Dust. Designed in the UK, these stoves are the most efficient of their size in the UK, together with the lowest emissions (Dust Particles) Rated Power: 4. 9 kW Energy Rating: A+ Weight: 65 Kg Efficiency: 0. 827 CO (at 13% O2): 0. 09 Mean Flue Temp: 231C DIN Plus dust (at 13% O2): 18 Nmg m3 Mean CnHm (at 13% O2): 65 Nmg m3 Mean NOx (at 13% O2):