Bill, I think you need to understand, it is up to the customer to decide if a feature is wanted, not you.
On board fan control will allow a reduction in pump noise, based on demand.
Do I think it is needed?
My opinion doesn't mean anything, if the customer wants this feature.
You asked "why", and I answered, if you what to argue, find someone else.
I find the power savings, and possible component life extension is more appealing then noise, but this is just my opinion and interest.
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