... natural gas combustion flue gas is about the theory 10.3NM3 (about 12.5KG). To excess air ratio of ... 1.3 as an example, have a smoke 14NM3 (about 16 ... degrees to 70 degrees lower, sensible heat released about the physical 1600KJ, the rate of water ... gas fuel saved nearly 10%.Split layout, installation takes many forms, flexible and reliableSpiral fin tube surface ...