Most site HVAC issues during Civil Defense inspection come from ONE mistake. ❌ Incorrect Staircase Pressurization Design. Stairwell pressurization is not just adding a fan. It is a life safety HVAC system that must work perfectly during fire emergencies. Many engineers face: ▪ Door opening failures ▪ Excess or insufficient pressure ▪ Rejections during Civil Defense approvals ▪ Unsafe smoke control during evacuation In our HVAC Design Training, we teach engineers how stairwell pressurization is a
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