A feed gas conditioner includes a pressure vessel that encloses at least part of a pre-heater. The pre-heater has an inlet for connection to a source of feed gas and an outlet for delivering the feed gas into the interior of the pressure vessel. An electrical heater element located within the pre-heater increases the temperature of the feed gas as it flows through the pre-heater. An expansion valve reduces the pressure of the feed gas as it flows from the pre-heater so as to initiate condensation. A super heater is at least partially located within the pressure vessel and has an inlet within the interior of the pressure vessel. A filter is in a flow path in the pressure vessel leading from the pre-heater heater to the super heater for removing condensate from the feed gas. An electrical heater element is in the super heater for heating the feed gas.