Here are some of the Features:
Dome Roof Construction---- The dome is the most desirable
roof construction for underground bunkers because the strength of
the dome is exponentially greater than that of a flat or slanted
Unexposed Air Ventilation and Filtration---- Your air supply
is provided by a sophisticated system that is not exposed to the
suface in any way which means that nobody can stop up your air supply.
Also your air supply is exchanged with fresh air constantly. There
will never be any build up of carbon dioxide or radon or carbon
monoxide or any other undesirable gases or odors. In addition your
air system will filter all of your incoming air supply so that you
will never be breathing anything but fresh, clean , non-toxic air
in your new subterranean survival shelter.
Self contained water supply----