⚡A ventilation audit is a systematic, documented, periodic and productive evaluation of how well our system is working according to regulatory requirements and commitments. As a ventilation leader, we have to establish minimum requirements to protect persons underground from hazardous conditions specific to the mine. ⚡ I have extensive experience dealing with governmental audits related to ventilation mining operations. As a ventilation engineer, I have worked closely to ensure that all regulations were being followed according to mandatory standards. I strongly believe this helps us to compliance with legislative requirements and give us opportunity for improvement. ⚡One requirement consists on ventilation plans, which have to be updated at intervals not exceeding of six months (time depends on country regulatory), I recommend to have a monthly update showing location of fans, doors, directions and volumes of air flows: intake air – blue, exhaust air – red.