Having your own shelter is a logical investment in security

NBC Air filtration system building an underground bunker DIY underground bunker kit how to survive a nuclear attack bomb shelter kit description - A panic room, bunker, or bomb shelter only goes part of the way to protecting your family and possessions. In the event of a nuclear, biological, or chemical attack, you need to be able to control the environment inside your protected space. Castellex fallout shelter ventilation systems are built to give maximum peace of mind. They will operate efficiently in critical situations and provide permanent protection.