... used in smelting or equipped with oil melting furnace and kitchen equipment, inflation and pressuring facility. Also used with Industrial boiler, ... . The environment with non causticity air, non inflammable and explosive air, and the temperature of air must be below 80°C ... , have 180W, 250W, 370W, 550W, 750W, 900W, 1100W, 1500W, 2200W and 3000W, total 10 models for customers to choose. Air outlet ...