Basic Concepts of Ventilation Design GHDonline
02/08/2010· Bench Grinder Exhaust Ventilation • However there are losses thru the grinder hood entry SP 2 = (VP 2 + h e) where h e is the energy loss of the hood entry • Static pressure (SP) must decrease due to acceleration of air up to the duct velocity • F h is defined as the energy loss factor (for that hood design) • Energy losses will be measured as a function of the velocity pressure in