[RFI] RFI from new Hi-efficiency furnace?

[Pawlak, Dan L.]

Mel,
	I have a Trane (installed 2 years ago) and have had some RFI problems with it. I haven't been active for awhile so I don't remember which bands were affected the most. However, I complained to the installer and the manufacturer provided a filter which he installed. I think it was connected to the box that controls the combustion air blower (or whatever it is called). It mitigated the noise somewhat, but not completely. I was planning on adding some ferrite myself, but haven't gotten around to it. If you need more information on this furnace and the filter, I can dig it out for you.

Dan  Kf4kkf

"Let every man be quick to hear, slow to speak, slow to wrath..."


-----Original Message-----
From: rfi-bounces at contesting.com [mailto:rfi-bounces at contesting.com] On Behalf Of Mel Crichton
Sent: Wednesday, October 27, 2010 12:42 PM
To: rfi at contesting.com
Subject: [RFI] RFI from new Hi-efficiency furnace?

Looking to replace old furnace with new 95% efficient unit. (Air conditioning won't be changed out as it works fine and no RFI)

I plan to stay away fom variable speed drive on the primary fan to avoid traditional RFI from VSD untits, but most all units have ECM (electronic control module) on the smaller combustion air blower. Some even have DC motors.

Any experience (good or bad) with these high efficiency furnace units? (RFI in or out?)  Looking at Carrier and brands made by Carrier  (Kenmore, Bryant)

Mel KJ9C

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