Polvent water evaporating type cooling system is one of the most reliable & efficient by which the atmospheric air gets cool and pumped into the department through GI duct. & Grills. Due to negative pressure created by the fan the atmospheric air enter through pre-filter into the cooling media (may be spary type or pad type). Where the air gets cool near to wet bulb temperature of water adiabatic. Further the cool air pumped into the department through GI dict & double deflection Grill with volume control damper.