The First Spacelab Mission (FSLP) is a joint ESA/NASA mission and is scheduled to be flown in September 1983. The European complement of FSLP consists of user provided experiments, ESA provided Mission Peculiar Equipment (MPE), and Spacelab hardware.The thermal accommodation concept for the European experiments and the design of the thermal MPE is presented. The thermal analysis approach and results will also be discussed. For the thermal design, the use of Spacelab environmental control facilities is maximized. The instruments located inside the Spacelab module are thermally controlled entirely by baseline Spacelab facilities.Payload located on the pallet is cooled via a new freon cooling lopp layout, which deviates from Spacelab Environmental Control System (ECS) baseline and which is determined by specific payload requirements.In addition, the thermal insulation principle of the pallet mounted equipment is introduced.