HVAC engineers

  FIRE SAFETY IN HVAC SYSTEMS (As per NBC 2016 / NFPA 90A / ASHRAE 15) 1. Fire Dampers Installed at wall/floor duct openings Close automatically in fire Stop fire spread between rooms 2. Smoke Dampers Control movement of smoke Operate through fire alarm system (FAS) Help keep escape paths clear 3. Combo Dampers Work for both fire + smoke Used in important areas Automatic operation 4. AHU Interlocking AHU stops during fire Connected with fire alarm Prevents smoke circulation 5. Staircase Pressurization Keeps staircase smoke-free Maintains positive pressure Helps safe evacuation 6. Smoke Extraction Removes smoke from building Used in basement / large areas Starts automatically in fire 7. Duct Fire Safety Metal ducts (non-combustible) Fire-rated if required Limits smoke & fire spread Key Point HVAC should not spread fire or smoke All systems must work automatically Simple Understanding: HVAC in fire = Stop Smoke + Safe Escape