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  1. Disaster Preparedness General Discussion
    how do you ventilate your blast/fall out shelter? vertical pipes to the surface seem the most common, but i have been reading they can be sheered off by high winds. alot mention a aluminium pipes up to the roof ( or to the otuside), but the pressure from some of the waves will crush the pipes...
  2. Disaster Preparedness General Discussion
    We are in the process of getting a bunker compound for our huge huge huge family 30+ One thing we are worried about is air and the qualty of air... how is ventilation, and what product do we need, the best filter to get how many ... so may factors If you have a suggestion or even have a bunker...
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