Air curtain heater 3-500KW,high pressure,continuous workability,durable performance,precise temperature controlling. Air curtain heater I. ... hot air as soon as the heater is switched on. Continuous PID/SSR(PID/SCR)controlling, digital display and setting of ... supporting device of many machines, such as hot air convey furnace, drying furnace, oven, drying house, dry tunnel, PS drying plate Of ...