>> so unless you can keep the warming and the cooling >> apart you get nowhere. > Well, if you read the articles and documents linked to, > and watch the video, you'll see there's no mention at all > of anything cooling If there's a video of it actually in action with a COP of 20 then you can just label him a fraudster and move on. > If the COP of 20 is to be believed, As I noted before, it's not. Anything over 3 is "impossible" (for most values of impossible). Russell -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist