Calculation of Fan Parallel Connection Total Pressure：Pt_parallel = Pt_single Static Pressure：Pst_parallel = Pt_single Dynamic Pressure：Pd_parallel = Pd_single Flow Rate：Q_parallel = Q_single× 2 Noise：LwiA_parallel = LwiA_single + 3dB *Rotational Speed：n_parallel = n_single× 1.05 *Shaft Power：N_parallel = N_single× 2.15 * Indicates Currently un verifiable 