Had a York 2 ton all in one (AC/Natural Gas heat) unit installed a year 
ago. Has variable speed motors. I dreaded the RFI possibility. At the 
time though other priorities necessitated getting one as quick as 
possible and nearly all I shopped for had variable speed motors.
 Fast forward, no RFI detected from it. I could spit on it sitting here 
in the radio room if not for the outside wall :-). Only thing I hear on 
the rigs is when the natural gas ignitor kicks on for a second or so. 
Guess I got lucky.
73
Chuck
W4NBO
On 2/14/23 11:42, Gary Smith wrote:
 
Fixed speed blowers do not usually create RFI.
They come on when needed to a preset rpm, shut down when no longer needed.
Gary…wa6fgi
Sent from Gary’s iPad
 
On Feb 13, 2023, at 8:54 PM, RVZ via RFI <rfi@contesting.com> wrote:
Hi Guys,
 I've seen posts where some Air Conditioners and Furnace units with 
variable speed motors create RFI on the Ham Bands. I'm thinking of 
purchasing a new Carrier 3.5 ton Heat Pump, Model 25SCA542, with a 
"fixed speed" blower and am wondering if anyone has had RFI issues 
with these? Thank You in advance for your thoughts. 73, Dick- K9OM 
(RLVZ@aol.com)
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