On 7/17/2024 11:40 AM, Steve Dyer W1SRD via RFI wrote:
Conversely I have ECM's on both the indoor and outdoor units and the
compressor is a VFD. No RFI. It depends on the vendor, their OEM's, etc.
Best advice is find an installer that will take the time to understand
what you need. My installer was even interested enough to take me around
to existing installs of the system so I could listen for RFI.
Strongly agree. This is the level of due diligence that is needed for
any potential noise source. In general, the reports I've seen of clean
systems have had this sort of work before purchase.
73, Jim K9YC
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