IOM – FLEXY II – 1007 – E Page 38
The performanc es of twin fan units can be calculated starting from the corresponding oper ation point for a si ngle fan
(see th e fig ur e be hind) b y a ppl ying t he for mulas belo w.
- pressure : PT win = P x 1
- vol ume flow rate : Qb = Q x 2
- impeller power: Wb = W x 2,15
- fan s pe ed : Nb = N x 1,05
- Lws : L wsb = Lws + 3 dB
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