[RFI] Multi-Stage High Efficiency Air Conditioner Units

[Kim Elmore]

The paperwork calls it "two stage" but it's all the same thing. A 
one-speed unit is quite capable of the job as well, since that's what I 
have, but not as efficient and not as effective at keeping the humidity 
in the house low. Curiously, the blower specified in the house for three 
different systems is the same variable speed unit (because it handles 
the new furnace as well, specified as 97% efficient, compared to our 
current 80% efficient unit) whereas the A/C condenser compressor is two 
speed. So, even with that, I'd have RFI to tame. I'd prefer the benefits 
of the variable speed unit if I can get it made RFI silent. They also 
specified a "5 stage" unit, which I assume means it has five compressor 
speeds. Again, same deal with the blower specified as "variable speed." 
Their five speed compressor could be done a number of ways, some quiet 
and some not. We'll see about all of this, but if the installer is 
unwilling to help deal with the RFI, I'll find another installer.

Kim N5OP

On 2/17/2020 11:47 PM, Jim Brown wrote:
> On 2/17/2020 9:04 PM, Kim Elmore wrote:
>> A two-stage unit probably wouldn't help much here in OK:
>
> It's two-SPEED that's being recommended to you, Kim. No less capable 
> of cooling and heating, just a bit less power pulled out of the wall 
> by the variable speed unit.
>
> 73, Jim K9YC
>
>
>
>
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-- 

Kim Elmore, Ph.D. (Adj. Assoc. Prof., OU School of Meteorology, CCM, PP 
SEL/MEL/Glider, N5OP, 2nd Class Radiotelegraph, GROL)

/"A great second violinist plays second fiddle to no one." //– Robert C. 
Marsh, Chicago Sun-Times./