The JRQFS400 is an amplified PTC enclosure heater with a substantial Heat Load of 386−415W. It runs on the same Operating Voltage of 220−240VAC50/60Hz as the JRQFS200 but draws a higher Maximum current of 2.0A (50Hz). This model offers the same efficient Air flow of 63m 3 /h and maintains the Vertical direction installation. Its thermal properties are dictated by the built-in PTC resistor for safety. The unit retains the Aluminum case material, 0.35kg weight, and the wide operating range of −45 ∘ C to +85 ∘ C.