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Central Cooling Systems

Gul Bahar Shah
When outdoor temperatures soar, keeping a massive commercial building cool is a complex engineering challenge that relies on multiple integrated systems working together. Here’s how it’s achieved in a professional, human‑sounding explanation: 🌬 ️ Central Cooling Systems Chiller plants : Large buildings often use water‑cooled or air‑cooled chillers to produce chilled water. This chilled water circulates through pipes to air handling units (AHUs) and fan coil units (FCUs), cooling the air supplied to different zones. Cooling towers : In water‑cooled systems, cooling towers reject heat from the building into the atmosphere by evaporating water, keeping the chillers efficient even in peak summer. 🌀 Air Distribution Air handling units : These units' condition and distribute air across floors. They regulate temperature, humidity, and air quality. Variable Air Volume (VAV) systems : Adjust airflow dynamically based on ...
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Duct & Chilled Water Pipe Insulation

Gul Bahar Shah

 Duct & Chilled Water Pipe Insulation

System Materials Density Thickness Vapor Barrier
Duct Insulation - Glasswool <br> - Rockwool <br> - Phenolic Foam <br> - Elastomeric (NBR/EPDM) 24 – 48 kg/m³ - 25 mm (≤ 65 mm dia) <br> - 38 mm (65–150 mm dia) <br> - 50 mm (>150 mm dia) Aluminum foil or kraft paper laminate
CHW Pipe Insulation - Pre-formed rigid fiberglass <br> - Rockwool <br> - Elastomeric foam (Armaflex) — - 25 mm (General) <br> - 38 mm (65–150 mm dia) <br> - 50 mm (>150 mm dia) Required for all cold pipes (to prevent sweating & energy loss)
⚡ Quick Notes for QC/Inspection:
Always check material type, density, and thickness against specifications.
Ensure vapor barrier is intact on all cold ducts and pipes.
Insulation must be continuous and sealed properly at joints to avoid condensation.
HVAC DuctInsulation ChilledWater MechanicalEngineering BuildingServices EnergyEfficiency GreenBuilding ConstructionProjects ProjectManagement QualityControl MEP SustainableBuildings SiteInspection HVACSystems

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