[Elecraft] Quiet Ductless HVAC System

[Clay Autery]

You are correct, as usual.  <smile> My intent in citing motors, et al. 
was that MOST of these devices, especially these days, are 
monitored/controlled by potentially offending devices.

______________________
Clay Autery, KY5G
(318) 518-1389

On 05/27/20 17:29, Jim Brown wrote:
> On 5/27/2020 3:09 PM, Clay Autery wrote:
>> ANY part of the HVAC system that uses a motor or reciprocating drive 
>> mechanism that runs off AC current.
>
> Not quite. The culprit is most often variable speed controllers for 
> ANY motor. Systems without such "go fasters" are far less likely to be 
> noisy.
>
> 73, Jim K9YC
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