PL
In this paper some selected problems dealing with an influence of different throttling conditions on the flow structure inside a cross flow fan working in a unit incorporating a heat exchanger as well as on aerodynamic performances of a cross flow fan and unit have been studied. Different experimental and numerical methods have been used to verify and confirm selected flow phenomena. The local pressure loss as an effect of a heat exchanger resistance has been estimated taking into consideration some experimental results confirmed by the Finite Volume Method computation.