... 028, 150W,250W,400W Compact design Low noise Dynamic Compact Semiconductor Fan Heater, Industrial Electric Air Heater, CSL 028, 150W ... of condensation and provides an evenly distributed interior air temperature in enclosures with electric/electronic components. The ... an enclosure in accordance with UL508A Compact Semiconductor Fan Heater, Industrial Electric Air Heater, CSL 028, 150W,250W,400W ...