Introduction BPH is the new series of Centrifugal Plug Fans from S&P. This new Plug Fan improves even more the greatly extended product range from S&P. Compared with its previous version, it achieves higher performance in terms of pressure & airfl ow, lower noise level and a higher effi ciency degree, reaching top industry levels. In order to meet market demands, S&P has created a vertical disposition version and included Permanent Magnet motors, to reach even higher effi ciencies. Extremely low maintenance is required thanks to its direct driven design. Applications: Air Handling Units 4