The conducted comprehensive study involves the rigorous testing of cylindrical heat pipes integrated with screened mesh. The primary focus is on evaluating their characteristics and performance using water as a working fluid at various inclination angles, yielding significant findings. The results indicate a clear correlation between an increase in both heat input and inclination angle below 30°, leading to a notable reduction in thermal resistance and a simultaneous enhancement in effective thermal conductivity. Remarkably, in the case of a horizontal heat pipe, the effective thermal conductivity reached its maximum value of 6050 W/m°C at a heat input of 60 W. Furthermore, the study uncovered a compelling observation regarding the effective thermal conductivity, which demonstrated an increase of approximately 15 times greater than that of a copper rod for inclination angles below 30°. Apart from this, a phenomenon termed as dry-out has been observed at an inclination angle of 40° above a power input of 30 W.