11 Duct area m2 Actual Design Duct 12 R2 ÷ R11 = V m/s Velocity 13 Duct Vp (V/1.29)2 Pa 14 Duct Length m Taken from Plans From Equation or 15 Friction Factor (F’d) Vp/m Nomograph 16 Actual Friction Rows 14x15 - From Figures on 17 Hood Loss - laminated sheets Add in a value of 1.0 in the column 18 Acceleration - ONLY if there is a hood attached to that particular leg From Figures on 19 Elbows - laminated sheets From Figures on 20 Branch Entry - Factors laminated sheets VP 21 Other (a) - 22 (b) - 23 (c) - Add up 24 Total Loss Factor - rows16-23 25 Duct Sp Loss Rows 13x24 Pa SP
11 Duct area m2 12 Actual Design Duct Velocity R2 ÷ R11 = V m/s 13 Duct Vp (V/1.29)2 Pa 14 Duct Length Taken from Plans m 15 Friction Factor (F’d) From Equation or Nomograph Vp/m 16 VP Factors Actual Friction Rows 14x15 - 17 Hood Loss From Figures on laminated sheets - 18 Acceleration Add in a value of 1.0 in the column ONLY if there is a hood attached to that particular leg - 19 Elbows From Figures on laminated sheets - 20 Branch Entry From Figures on laminated sheets - 21 Other (a) - 22 (b) - 23 (c) - 24 Total Loss Factor Add up rows16-23 - 25 SP Duct Sp Loss Rows 13x24 Pa