justinterested
Computer
- Jan 11, 2006
- 5
Hi I am looking for a little information on the motors they use in the room type evaporative air conditioners, these are normally on trolleys and it’s the type with centrifugal fans that I an most interested in.
I have noticed that some have an audible hum to them when running, what causes this and how is it stopped.
Second how would the running speed be reduced without using an electronic speed control, again these cause an audible hum.
Bottom line is I want a fan that can move good airflow that is almost silent from buzzing and humming type noise.
I have noticed that some have an audible hum to them when running, what causes this and how is it stopped.
Second how would the running speed be reduced without using an electronic speed control, again these cause an audible hum.
Bottom line is I want a fan that can move good airflow that is almost silent from buzzing and humming type noise.