SAFE HANDLING OF FIRE EXTINGUISHERS – A LIFE-SAVING SKILL 🔥 Fire emergencies can escalate within seconds. In workplaces such as construction sites, industrial plants, offices, warehouses, and railway infrastructure projects, the correct use of a fire extinguisher can prevent injuries, equipment damage, and major operational losses. I recently reviewed a detailed Fire Extinguisher Safety & Handling training module covering extinguisher selection, the PASS technique, extinguisher types, and fire blanket usage. One key lesson stands out clearly: 👉 Not every extinguisher is suitable for every fire. Using the wrong extinguisher can worsen the fire, create electrical hazards, or increase the risk of injury. 🚨 Understanding the Right Extinguisher Matters Different fire risks require different extinguishing agents: 🔹 Water Extinguishers – For Class A fires involving paper, wood, and solid combustibles 🔹 Foam Extinguishers – For flammable liquid fires 🔹 ABC Powder Extinguishers ...
Air Changer Per Hour (ACH)
In a lot of projects, I still see ACH being selected very early, sometimes based on old projects, rules of thumb, or simply “this is what we usually use”, but ACH is not a universal value you can apply everywhere. When it’s used without really understanding the space, it can create more problems than it solves: Too high → unnecessary fresh air, higher energy use, and humidity issues Too low → poor air quality and uncomfortable spaces What often gets missed is that ACH is just a way to express airflow, it doesn’t tell you why that airflow is needed, but in reality, ventilation should come from: 1- how many people are in the space 2- what kind of contaminants are present 3- requirements from standards like ASHRAE 62.1 ACH works well for certain applications like toilets, parking areas, or some industrial spaces where you’re dealing with dilution. But for offices, data centers, and comfort cooling spaces, airflow should be driven by occupancy, heat loads, and indoor air quality needs, not a predefined ACH assumption Remember, a good engineer underdtands what the space actually needs, then sizing the system accordingly.
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