CO2 DOES sink to the bottom of an enclosed space. Ask the widows of three guys at one of the breweries I worked at - not while I was there I hasten to add, but a few years before. Unfortunately I have also worked in another where someone took his last drink in a full FV, not a pub (his own choice, not an accident). And I have know of other deaths, animal and human due to CO2 in enclosed spaces - FVs, effluent chambers
Point I'm making is - ensure you have adequate low level ventilation and ensure if you go into aan enclosed space, it is checked thoroughly for CO2 content (not more thn 0.5% for more than 10 minutes) and Oxygen content (> 19 % I seem to remember - need to check the exact figure though)
And an enclosed space can be your fermenting room, it doesn't have to be a tank, or drainage pit
Point I'm making is - ensure you have adequate low level ventilation and ensure if you go into aan enclosed space, it is checked thoroughly for CO2 content (not more thn 0.5% for more than 10 minutes) and Oxygen content (> 19 % I seem to remember - need to check the exact figure though)
And an enclosed space can be your fermenting room, it doesn't have to be a tank, or drainage pit
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