Abstract: A radiant heater modules comprises a plurality of quartz iodide bulbs projecting from an air cooled housing and a reflector to direct heat from the bulbs toward the pipe. This housing is of a generally box-like configuration and includes a top cover plate. The bulbs are mounted in sockets which are attached to the bottom side of the top cover plate and the sockets are electrically connected to a plug which is fixedly attached to the top side of the top cover plate. Means are also provided for rigidly securing the housing to the reflector.