I am very concerned about RFI from any new HVAC systems manufactured and
installed since new energy savings codes went into effect in mid-2019.
For examples of modern, RF-noisy HVAC systems, and possible mitigations,
see
https://viennawireless.net/wp/wp-content/uploads/2021/09/HILLSON_RFI_PDF_3SEP2021.pdf
.
As you say, yours was installed in 2013.
My current furnace was installed in 2004. Single speed, no ECM. Yes, the
fan draws 800 watts when it's running. Nearing end-of-life, so I'm
carefully shopping.
73,
Steve, N2IC
On Tue, Feb 14, 2023 at 12:37 PM Steve Dyer W1SRD via RFI <
rfi@contesting.com> wrote:
> Steve,
> I guess you don't believe and want some evidence.
> I have the Bryant Evolution Extreme (equivalent system to the Carrier
> Infinity Greenspeed) and it is RF quiet. It was one of the conditions of
> purchase I made with the installer. Both the air handler and compressor
> are VS.
> This is a 2013 vintage system so I have a few thousand hours in front of
> the radio with the system on and off.
> I live in a rural location so it's not masked by local noise. The beams
> are within 100'.
> I can stand right next to the outdoor unit with a SW radio and barely
> hear anything.
> I am extremely pleased with the systems lack of RFI, efficiency and home
> comfort.
> Variable speed systems can be engineered well for EMC.
> 73,
> Steve
> W1SRD
>
> On 2/14/2023 11:17 AM, Steve London wrote:
> > Better yet, show us spectrum displays of about 100 kHz width, on the band
> > with the closest antenna, when the band is dead, with the fan running,
> and
> > with the fan off.
> >
> > 73,
> > Steve, N2IC
> >
> > On Tue, Feb 14, 2023 at 12:05 PM James Jordan <k4qpl2@gmail.com> wrote:
> >
> >> I have a Carrier "Infinity" system with fully VS drives on both the
> >> compressor and air handler fan. It's their top of the line most
> efficient
> >> system. Never heard a peep of RFI from it. I'll walk closer to the units
> >> with an AM radio to see if I'm missing something and if I hear anything
> >> I'll post again.
> >> 73,
> >> Jim K4QPL
> >>
> >> On Tue, Feb 14, 2023 at 12:57 PM Dennis Monticelli <
> >> dennis.monticelli@gmail.com> wrote:
> >>
> >>> The variable speed fan motors are bad news. Fixed speed or multiple
> >> fixed
> >>> speed (selected by winding) are fine. However the fan motor isn't the
> >> only
> >>> motor in the system. Look into the compressor too. There is also a
> >> lesser
> >>> chance that the controller board generates noise you can pick up. If
> >>> accessible during installation, some ferrite sleeves on the digital
> >> board's
> >>> wires are a good idea.
> >>>
> >>> Both of my Daikin HVAC units are completely quiet but those models were
> >>> chosen with no PWM drive motors and I did put ferrites on the
> controller
> >>> board for extra insurance.
> >>>
> >>> Dennis AE6C
> >>>
> >>> ---------- Forwarded message ---------
> >>> From: <rfi-request@contesting.com>
> >>> Date: Tue, Feb 14, 2023 at 9:00 AM
> >>> Subject: RFI Digest, Vol 241, Issue 20
> >>> To: <rfi@contesting.com>
> >>>
> >>>
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> >>> Today's Topics:
> >>>
> >>> 1. RFI from Carrier Heat Pump? (RVZ)
> >>>
> >>>
> >>> ----------------------------------------------------------------------
> >>>
> >>> Message: 1
> >>> Date: Tue, 14 Feb 2023 04:54:07 +0000 (UTC)
> >>> From: RVZ <rlvz@aol.com>
> >>> To: rfi@contesting.com
> >>> Subject: [RFI] RFI from Carrier Heat Pump?
> >>> Message-ID: <735693955.1361834.1676350447226@mail.yahoo.com>
> >>> Content-Type: text/plain; charset=UTF-8
> >>>
> >>> 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
> >>> )
> >>>
> >>> ------------------------------
> >>>
> >>> Subject: Digest Footer
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> >>> ------------------------------
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> >>> End of RFI Digest, Vol 241, Issue 20
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