On Saturday 10 February 2007 15:27, Alan wrote: >> In the building where I live, the building administration is intending >> to install at its top an antenna for irradiating the signal for >> wireless Internet users. Can those antennas interfere with the health >> of the people living in the building? > >If you climb onto the roof and eat it, then it might be bad for you. > Don't forget the possibility of a fall, and that generally is bad for ones health too. >If you wanted a more serious answer then try a more relevant list. Some >keywords that might help you are "ERP", "SAR", "NCRPM" and "FCC" > >Alan More seriously and practical, the answer is no. To do the math, I believe the current suggested radiation level maximums for continuous exposure at in the range of 1 milli-watt per cubic centimeter of absorbed radiation. With TPO power levels under a watt, well under a watt in most cases, one would almost have to stick the antenna in your ear or mouth to exceed this by a sufficient margin as to be cause for a health concern, particularly given the relatively short period one could tolerate it, and then I'd be more worried about the cleanliness of the antenna if I was to use it for a toothpick than about any radiation concerns. Using your cellphone is a far larger risk in general. >From a foot away, its 100% safe, from 3 floors away you'll die of old age like I intend to. I'm a broadcast engineer for the last 45 years, and still doing it. -- Cheers, Gene "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Yahoo.com and AOL/TW attorneys please note, additions to the above message by Gene Heskett are: Copyright 2007 by Maurice Eugene Heskett, all rights reserved.