Abstract: The infra-red heated spray paint booth has positioned in the roof thereof an infra-red heater which extends the length of the booth. The heater includes a black radiant pipe to which is supplied high temperature combustion gases at one end thereof while the other end has a vacuum pump to draw the combustion gases through the pipe. The pipe is comprised of three spaced sections, each of which is mounted adjacent the reflective surfaces of a reflector unit mounted on the roof of the booth. The reflector units cooperate with glass infra-red energy transmitting members to provide enclosed zones, with the black radiant pipe section positioned between each glass member and a reflector unit. The black radiant pipe emits infra-red rays which are focused in part by the reflector and pass through the glass infra-red energy transmitting member to impinge upon a freshly painted workpiece, for example, an automobile, in the paint booth below.