Bends on fan discharge
 
Bends near fan discharge should be in the direction of wheel rotation to prevent needless pressure loss.
 
Don't
Don't
Air moves faster at the outside of the fan housing and is not evened out before striking the abrupt bend.  A very high pressure loss results.
 
Do
Do
Improved discharge arrangement with radiused bends and splitters or different fan mounting position will reduce system losses.
Bends should 'rotate' in the same direction as the impeller.
 

 

Propriety information courtesy of FANTECH (Australia)

 

 

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