The HVL 031 compact fan heater is a resistive element heater that provides even heating to maintain minimum operating temperatures in enclosures. This prevents failure of electronic components caused by condensation and corrosion. Five ratings are available from 100W to 400W. The heater is designed to operate on either 120 or 230VAC. The HVL 031 comes with integral fan assembly. The HV 031 comes without the fan but must be installed with a customer supplied fan. This product is CE, UL Recognized, VDE and RoHS compliant.