Ik zou fin-fan hier durven weglaten, op basis van het voglende:
http://answers.yahoo.com/question/?qid=1006031102839
A fin fan is a term used to refer to an aerial cooler. I believe at one time a specific manufacturer called their coolers "Fin-Fans" and the term later came to be a reference to any aerial cooler. Much the same was as electric refrigerators were all referred to as Fridigaires or copies are referred to as XEROX's. This type of aerial cooler is used a great deal in refinery and petro chemical plants. The construction usually consists of two metal rectangular boxes with drilled holes to accept hollow tubes that have aluminum fins attached to them. (For those familiar with a car radiator, the concept is the same. The difference is mechanical construction needs to be more robust because the pressures contained by the coolers is usually much higher than that of a car radiator.) The two boxes (called headers) with the interconnecting tubes are housed in a light metal plenum that directs air from one or more fans over the finned tubes to achieve the desired cooling. This is a simplified description of an aerial cooler. There are many details regarding fabrication, configuration, materials, fan design etc. that I have left out.