Since there were large waves on the film, the minimum wetting rate (MWR) was greatly affected by the waves. The contact angle of the film at the top edge of the stable dry-patch varied periodically synchronizing with the arrival of the waves. When the contact angle exceeded the maximum advancing contact angle, the top edge of the dry-patch began to move downward, i.e. the rewetting of the dry-patch was initiated. The MWR was properly given by considering the force balance at the top edge of the dry-patch that when the maximum of the dynamic pressure of the film fluctuating according to the waves exceeds the film holding force by surface tension corresponding to the maximum advancing contact angle. Many tiny bubbles were observed in the film in the falling film boiling and the upward flow boiling. The bubble generation in the film might create a dry-patch locally in the film. If the film flow coming to the dry-patch could not rewet it, the CHF condition occurred. In the falling film boiling, since the long film flow might have a larger disturbance of the film flow than the short film flow, the CHF of the long falling film boiling was higher than the CHF of the short falling film boiling. The disturbance of the film flow of upward flow boiling was larger than that of the falling film boiling. Thus, the CHF of the upward flow boiling was larger than the CHF of the falling film boiling. The CHF of those were predicted with a unique correlation except for the constant that expressed the difference of the degree of the disturbance of the film flow. The CHF of the flat mini-channels were also predicted well with the CHF correlation except for the constant. The constant, i.e. the CHF, was lower than of course the CHF of the upward flow boiling and also than the CHF of the falling film boiling. Since a wall effect due to the viscosity that suppressed the growth of the film flow disturbance was enhanced in the flat mini-channels, the disturbance of the film flow on the heat transfer surface was reduced and the CHF might become smaller. Correlations for the wavelength, the maximum film thickness and the wave velocity were introduced. The proposed correlations required only a film flow rate, physical parameters and geometrical dimensions. These values of the wave characteristics were required in the correlations of the MWR and the CHF. What is left toward the next step is to incorporate these characteristics of the waves with the MWR and CHF correlations.