... biomass as the fuel , no smoke and no dust , fully environmental friendly .(2). easy ignition , large volume of fire .(3). The ... ,(5). Graceful appearance, low let-out, no pollution. Comparing with the normal stove , can save 60% of energy . Show the character of ... and its hole temperature can be up to 1000 degrees2. Energy-efficient: 1kg of firewood can burn one hour.3. Clean and ...