The Hartmann net consists of naturally occurring charged lines, running North-South and East-West. It is named after Dr. Ernst Hartmann, a well regarded German medical doctor, who first described it soon after the second world war. Alternate lines are usually positively and negatively charged, so where the lines intersect it is possible to have double positive charges and double negative charges, or one positive and one negative charge. It is the intersections that are seen to be a source of potential problems. These lines can negatively infuence the body. This low level stress on the body, in definite lines, will effect any sleeping area over the size of a twin bed just becasue of the spacing of the lines. Medical maladies tend to occur where these lines intersect the body. Some British studies have indicated that cancer occurs where the nodes of teh Hartmann lines occur in over 80% of the cases.
The Hartmann Net appears as a structure of radiations rising vertically from the ground like invisible, radioactive walls, each 21 centimetres (9 inches) wide. The grid is magnetically orientated, from North to South they are encountered at intervals of 2 metres (6 feet 6 inches), while from East to West they are 2.5 metres (8 feet) apart. Between these geometric lines lies a neutral zone, an unperturbed micro-climate. This network penetrates everywhere, whether over open ground or through dwellings.
The Hartmann net has been defined using the Chinese terms of Yin and Yang. The Yin (North-South lines) is a cold energy which acts slowly, corresponds to winter, is related to cramps, humidity and all forms of rheumatism. The Yang (East-West lines) is a hot, dry rapidly acting energy. It is related to fire and is linked to inflammations.
The points formed by the intersection of these lines, whether positive or negative, are dynamic environments sensitive to the rhythms of the hours and the seasons.
As stated before, if you are sleeping in a full size bed or larger, one or more lines will intersect your sleeping area. Mitigation (a device that will interrupt or move the effects of the line) is the only way to alleviate the issue. Because this phenomenon effects you every night you sleep (and potentially where you work as well), this is an issue that should be addressed.
Websites, such as www.geovital.com can provide more information on devices to alleviate these issues.
Source:
http://www.crystalinks.com/grids.html
http://www.microalpha.com/images/H.gif