![]() Calculate how many people will be down in the bunker and for approximately how long, then use that information to determine how much air you’ll use. You’ll need a system that will last for months and be able to withstand a storm or bomb going off. Installing a reliable air ventilation system in your bunker should be your first priority. You won’t survive long underground without oxygen. So what do you need to keep your family safe in the event of an emergency? A survival bunker could mean the difference between life and death. The poles are placed across the trench, and their ends should extend at least two feet past the edges.The threat of tornadoes and other dangers from above is a pretty serious matter for those living in certain areas of the U.S. Once you have decided upon appropriate dimensions, start digging away earth and cutting poles to the appropriate length. ![]() The shelter should be located at least 50 feet away from any large buildings, because nuclear explosions can cause far-reaching firestorms and damage structures well past ground zero. To begin, you should stake the outlines of your trench with shafts of wood. This page provides instructions for building a Kearny Air Pump (KAP), a simple yet effective way of circulating air while allowing minimal, safe amounts of radiation into the shelter. Homemade air ventilation - Because our bodies give off water vapor, the insides of a fallout shelter would quickly become unbearably hot without proper ventilation.It may be necessary to stay inside a fallout shelter for as much as two weeks after a nuclear attack, so sufficient amounts of water will guarantee survival. ![]() Water - Fifteen gallons of drinking water is recommended to last people inside the shelter as long as possible. ![]()
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