One increasingly popular option is investing in backyard bunkers. This article will delve into the costs, maintenance, and return on investment (ROI) associated with building and maintaining a ...
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I built a bunker: How much air do I need?
The Backyard Bunker is BACK! In this video, we will install the air conditioning system into the bunker and test the airflow needed to maintain a healthy living atmosphere underground. The CO2 Air ...
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