[Elecraft] OT: RFI from Modern Furnaces

[Don Nelson]

Hi all,

There was a discussion some time ago about RFI emanating from front loading
washers.

This note is about the possibility of RFI emanating from microprocessor
controlled house furnaces. We had to have our house furnace replaced last
week because of a failure. Yes we winter camped for a over a day as a
result. We now have a 95 percent efficient microprocessor controlled furnace
installed. I did not think about possible RFI that it might emit at the time
of choosing that furnace.

The good news is that I have not found any RFI on the HF bands as yet while
the furnace is active or not active. My question to the group is: was I
lucky? The furnace control has a very nontrivial computer control and could
cause plenty of noise. It would be nice to think that the designers of
furnace control systems are sensitive to RFI radiation issues.

The furnace is a Lennox model G71MPP.

Don, N0YE
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