In pipeline targets negative example, why the system outlet pipe you select only 6 meters long but not all. In the bend d (mm) is the diameter equivalent? Why outlet area is 0.05m2 which is not 0.07m2. Target sound in software specific weight is how much? To ask when his 2-way audio standards both on the inlet and outlet?
Thanks a lot.
6m is the distance from the front fan to pipe wind mouth need audio standards. Wind mouth area of 0.05m2, the proportion is 60Kg/m3. Noise parameters are the manufacturer for both the inlet and outlet so you can charge for both ends of the fan if sufficient space to allow installation. In the case of fans, the calculation for the main outlet pipe is, and vice versa
Best regards!
