Thermax Thermacast™ Electric Combo Vaporizers combine a direct-to-process vaporizer and a pressure-building gas vaporizer into a single, efficient, compact, reliable and economic package. The main direct-to-process circuit vaporizes and superheats the liquefied gas to the desired outlet temperature. The gas outlet temperature set point is user adjustable. The pressure building coil vaporizes a proportionally smaller flow rate of fluid and returns the gas back to the tank. Tank pressure is thereby maintained while liquid is withdrawn to feed the main direct-to-process circuit.