Re: Topband: Furnace RFI

> I have been very happy with the furnace and AC units themselves. I > just wish these companies would spend the extra $10 and take care of > RFI/EMI right at the source during design and production. Sounds like back in the day when TV manufacturers cried pity to the USA FCC, to have to RFI

Topband: Furnace RFI redux

If you have been following this thread, you have learned:(1) ECM blower motors are beginning to dominate the market. The issue isn't going away, and will likely become more prominent as older furnaces start needing replacement.(2) ECM motors either will or will not create an RFI problem.(3) At

Re: Topband: Furnace RFI

PDF Resolving Furnace and A/C RFI(Radio Frequency Interference … 73, Tony K4QE > On Oct 4, 2019, at 9:15 AM, MrToby wrote: > > The ARRL has a 2017 presentation on their website titled "Resolving Furnace

Re: Topband: Furnace RFI

Mark We installed a top of the line Lennox heating and AC unit 3 years ago. The PWM motors were a big concern of mine based on reports I had read about online. Lennox makes an RFI kit that they will provide if requested. There was no charge for the kit consisting of 2 toroids and an AC line

Re: Topband: Furnace RFI

tors are > going > the way of the abacus. He said it won't be long before all furnace blower > motors will be DC. > > 73. . .Dave, W0FLS > > -Original Message- > From: Rob Atkinson > Sent: Friday, October 04, 2019 5:43 AM > To: topband@contesting.com > Subject: Re:

Re: Topband: Furnace RFI

- From: Rob Atkinson Sent: Friday, October 04, 2019 5:43 AM To: topband@contesting.com Subject: Re: Topband: Furnace RFI Went through this about 2 years ago. Firstly, define "efficient." If you mean over 90%, as in one of those two stage furnaces with PVC handling moisture then you are

Re: Topband: Furnace RFI

Some good news/bad news intermingled below :-) At my house we had two modern air handlers and heat pumps put in about 5 years ago. They were high-efficiency rated and had Genteq ECM motors. Note that I call them ECM motors, not DC motors - they have power electronics that take regular 60Hz AC

Re: Topband: Furnace RFI

Went through this about 2 years ago. Firstly, define "efficient." If you mean over 90%, as in one of those two stage furnaces with PVC handling moisture then you are consigned to having to use a variable speed DC motor (there are no variable speed AC motors, only speed settings you set manually

Re: Topband: Furnace RFI

ill too.hi. - Original Message - From: "lmlangenfeld" To: "topband" Sent: Thursday, October 3, 2019 5:22:31 PM Subject: Topband: Furnace RFI We are in the market for a new high-efficiency furnace, and I note that many (if not most) of the current models use variable-speed

Re: Topband: Furnace RFI

on finding something quiet73 de Bill K4JYS PS...one helpful thing is to keep the t-stat up high so it won't run as much. Saves on the electric bill too.hi. - Original Message - From: "lmlangenfeld" To: "topband" Sent: Thursday, October 3, 2019 5:22:31 PM Subject:

Topband: Furnace RFI

We are in the market for a new high-efficiency furnace, and I note that many (if not most) of the current models use variable-speed DC blower motors.  I am concerned about the potential for RFI from the speed controllers, and wonder if any list members have any recommendations or recent