Fokker 100 aircraft are renowned for cabin heat issues in the warmer months of the year. The system fitted to the aicraft is overpowering on the smaller Fokker 70 variant and underpowered on the Fokker 100. Stork are now offering a RECAS Upgrade program for the Fokker 100. Two powerful suction fans mounted on the very aft bulkhead of the aircraft draw warm air out of the cabin allowing the fresh cool air from the overhead vents to be more effective.
The results of this new system have been very good and when combined with the traditional options such as an external aircon unit and switchin off cabin lighting... the temperature in the cabin is perfect.
Not entirely on topic but interesting info i thought on the whole aircon/air thingy...