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FFU static pressure selection in consideration CR system requirement.

FFU static pressure selection in consideration CR system requirement

T he FFU static pressureselectionshall consider the CR system static pressure loss including raised floor, cooling coil, grille, shaft space, piping / ducting space and additional pressure for future filter dust accumulation, which is ranged from170 Pa to 220 Pa (seedrawing below). However, most ofFFU design from othermanufacturers only considers the filter pressure loss(100-150Pa), which is far lessthan actual CR requirement and results in insufficient air flow.