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Fantech on-line ventilation fans & noise control product catalogue Product Code Search: Help? Do's and Dont's Home Do’s and Don'ts Fans Attenuators Installation Instructions Pressure Recovery Ancillaries About Us General Info Installation Look for opportunities for pressure recovery at centrifugal exhaust fan outlets Don't Do To determine the system resistance the discharge losses have to be added before selecting the fan With a correctly designed discharge diffuser the pressure recovery in the diffuser will reduce the system total pressure Discharge losses are highest in this arrangement and are equivalent to one velocity head Included angle of diffuser to be 15o or less Tech Talk Locate Us Discharge losses reduced by up to 75% in this arrangement http://www.fantech.com.au/10/22/2006 10:23:49 AM Fantech on-line ventilation fans & noise control product catalogue Product Code Search: Help? Do's and Dont's Home Do’s and Don'ts Fans Attenuators Installation Instructions Spinning of air at inlet connection Ancillaries About Us General Info Installation Ensure unintentional spinning of air at fan inlet does not take place Don't Do Unintentional spinning of air caused by a poorly designed inlet box can reduce performance by around 25% Splitters at the inlet help prevent spinning flow Turning vanes, where R/W