>> A ton of cooling is 12 Kbtu, about the heat of crystallization of >> one ton of water, per hour. >>> Why do engineers use so many whacky units? >> [...], tradition and convenience. > Good excuses for the masses. Not so good for engineering, which > depends on precise communication.
Which measuring air conditioning capacities in tons provides. Just because it's disorienting to those who are acquainted with only other meanings of the word doesn't make it any less precise. It's not even ambiguous, since air conditioning capacity doesn't have units of weight. You might as well ask why motor power is measured in horsepower - that's another historical unit that's cryptic and baffling to the uninitiated, but is perfectly good to those in the industry. /~\ The ASCII Mouse \ / Ribbon Campaign X Against HTML mo...@rodents-montreal.org / \ Email! 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B _______________________________________________ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user