[RFI] Ruud Furnaces and AC units

[Steve Dyer W1SRD]

Electronically Commutated Motor
Poorly designed = bad
Well designed = good
My 13 year old Bryant has 2 ECM motors that are quiet as a mouse.
73,
W1SRD

On 7/6/2025 12:51 PM, Jim Brown wrote:
> What's an ECM fan?  If it's variable speed, it's almost certain to be 
> noisy.
>
> 73, Jim K9YC
>
> On 7/6/2025 8:54 AM, Dan K2YWE wrote:
>> Is there any group knowkedge with respect to RFI from Ruud oil 
>> furnaces and
>> AC units that have ECM fans?
>
>
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