... Compact design Low noise Dynamic Compact Semiconductor Fan Heater, Industrial Electric Air Heater, CSL 028, 150W,250W,400WCompact designLow noiseDynamic ... to UL 499, intended for the use within an enclosure in accordance with UL 508A) 230V only: VDENoteother voltages ... the use within an enclosure in accordance with UL508A Compact Semiconductor Fan Heater, Industrial Electric Air Heater, CSL 028, 150W, ...