On Dec 10, 2007 10:09 AM, David VanHorn wrote: > > Any other suggestions? > > Using grid power, store up a tank of liquid nitrogen. :) That is a good idea, I have no idea how difficult it is to generate liquid nitrogen, but if it could be done on a small scale in a vehicle, that would be cool enough. :D An idea I had is that the heating and cooling systems could be modular, ie don't carry around an air-conditioning unit in the winter when it doesn't get used. Although a heater would probably be necessary for year round to defrost windows. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist