Comparatively high price, however. , , who buys cheap, buys twice!

I had ordered the flat tubes and had yet decided the round tubes with 150mm diameter to use me after long consultations with various kitchen studios. It seems that this was not a mistake!
Granted, the diameter is already not easy to hide from the optics, this should be laid down on jedden case by a screen or other structural measures. But the volume level and the life of the "suction" are a thank it in the long run! After all, the eye of a needle produced by the resistance and volume airflow a narrower version of the exhaust pipes.