How to Size U-Trap – AS/NZS 3666.1

Why is u-trap important and how to size an u-trap for air handling unit (AHU) or fan coil units (FCU)? Without the slightest doubt in my mind that the u-trap is among the misunderstood component of the heating ventilation air conditioning system (HVAC). The primary function of the u-trap is to prevent infiltration of air …

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