Page 3 - Performance Tests
To test the performance of the Reeven Kiran, the APH Networks proprietary testing method invented right here at APH Networks was used. This brilliant idea allows you to test your fans at a minimum cost: a piece of tissue paper and some duct tape. The test results can qualitatively indicate the airflow, airflow consistency, and amount of static pressure generated by the fan. The experiment settings were straightforward. As shown by the above photos, a piece of tissue paper was attached on top of a fan. The tissue paper should be able to naturally fall down and cover the air outlet side -- the side where the motor rack is located -- of the fan. The test subject should be put near the edge of the table, such that the experimental results will not be affected by the reflecting airflow. Once the fans were powered on, the airflow, airflow consistency, and the amount of static pressure can be evaluated by observing the behavior of the tissue paper. Finally, the fan needs to be tested in all of its RPM ranges. In this review, only the photo of the highest RPM was shown for the Kiran, since it represents the best performance regarding the airflow and air pressure of the product.
In the first photo, you can see the results of our test. As shown, the fan provided enough static pressure to keep the tissue paper almost parallel to the ground, and the amount of airflow in both cases was high enough to keep the rear end of the tissue paper floating. Small vibrations were noticed at the very end of the tissue paper due to the turbulence on the paper edge. Note, the turbulence was the result of using tissue paper; it has little to do with the airflow and air pressure performance of the fans. The following photo demonstrates the RGB lighting performance of the Reeven Kiran. As you can see from the photo, the light was diffused pretty well throughout the impeller area, thanks to the six LEDs behind the motor housing. I also noticed the colors were well tuned and they were true to the specifications.
The noise level performance of the Kiran was excellent. There are three reasons. Firstly, the fan speed is modulated by the PWM, which means the fan is not always at high RPM. Secondly, the rubber pads around the mounting screw holes reduce the vibrations. Think about this, if you put a vibrating cellphone on a solid surface how much louder is it compared with putting it on a soft surface? Thirdly, the fluid dynamic bearing makes the fan spin smoothly. Like all the other reviews at APH Networks, we rate the noise on a scale of 0 to 10, where 0 represents absolute silence, and 10 is the loudest. For the Reeven Kiran, I would like to rate it at 3.0/10. All in all, the Kiran features low levels of noise, and I can safely say that they are quiet enough to be used in 24/7 on a computer in your bedroom.
1. Introduction, Packaging, Specifications
2. Physical Look - Hardware
3. Performance Tests