[RFI] HVAC RFI

[Gary Johnson]

I have the Infinity 24VNA6 A/C and 59MN7B gas furnace. Both are completely quiet beyond a few feet away on all HF bands. All blowers motors are variable speed and have their drives integrated into the motor assembly, thus eliminating any wires on the PWM side and apparently the line side filtering is adequate. The A/C compressor has an ENORMOUS 240V RFI filter board packed with big LC components right next to the drive for the big compressor motor. Very impressive and thorough design. No wonder it’s quiet. Also acoustically very quiet. Photos available on request.

73, Gary NA6O

> 
> Resurrecting the old thread as I am faced with the same dillema
> 
> Carrier Infinity offers several different models,? ?59MN7C (top of the 
> line) and then 59TN7A, 59TN6 and 58TN0B being a two stage.
> 
> There is also another set of models falling under "Performance Series"
> 
> Does anyone know if all these models have the RFI filtering included ?? 
> ?EG? Quiet RFI as described below.
> 
> 73
> 
> Nick, VE3EY