Hi all, I have a situation where I have a switchgear building which is located within the reach of a gas cloud. We are not able to locate the building away. The HVAC system intake damper will close in the event of 30% LEL to prevent gases from being introduced into the building. On the other hand, the building requires pressurization to be maintained which requires air intake. Hence, there is control conflict. In this case, I am hoping anyone had the same situation and was able to mitigate by engineering controls and share them. Worst case we want to avoid is to shutdown the electrical building. Thank you in advance.
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