The intake-exhaust math, the soil test, and the build plan the kit sellers skip
Air you can verify, ground you can trust, a dome you can permit
Build the ventilation system nobody explained to you
Air, ground, and the dome — the full build, start to permit
Know your rock, water, and slope before you pour anything
Every formula, test, and pipe size in these pages is one you run yourself, on your own dirt, with tools you already own.
All 17 chapters of the complete system
BUNKER TRUTH
I started documenting shelter ventilation after watching three separate builds fail the same way: sealed rooms with no measured air exchange, just a vent pipe and a hope. I pulled the physics from Cold War-era civil defense manuals, cross-checked it against modern CO2 tables, and tested every protocol in this book on a real earthbag build outside Amarillo, Texas, over eleven months. The Kearny pump design in Volume I is the same one I built twice before it delivered the airflow the math promised. I wrote this down because the people asking about it in forums kept getting answers with no numbers attached.
I kept seeing the same question with no real answer attached: does my shelter's air actually work, or am I trusting a vent pipe I never tested? I wrote this collection because I couldn't find one source that gave the math, the soil tests, and the build steps together instead of scattered across forum threads and sales pages. Every protocol here is one I built or tested myself, on real ground, with tools available at a hardware store. This isn't a theory book. It's the sequence I wish someone had handed me before I started digging. My hope is that you read it, run the tests, and know — not hope — that your family's air will hold.
You have 7 days to read the protocols and run the tests on your own shelter or site. If the math doesn't check out for you, email us and we'll refund every dollar — no forms, no argument.
The protocols, the tests, and the build — all three volumes
GET THE FULL SYSTEM $97 →Volume I alone gives you the intake-exhaust rule, the pump build, and the three tests — for $27.
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