Good idea. Interesting, I had one AC guy call me back. When I brought up the topic he said, you don’t want any unit that uses that technology, unless you have lots of money to spend on repairs!
Run from that guy. It's HIS responsibility to install an rfi quiet device. Proper bonding and shielding goes a LLLOOONNNGGG way towards limiting your rfi.
When the superstations are running rfi quiet variable speed systems, they can be done. It takes ferrite. 43 and 61 mix. It takes twisted pair wiring. It takes a clause in the contract that if it doesn't meet residential rfi guidelines the contractor must repair or replace at their expense.
If your contractor even has the slightest jiggle about any of what I just said, tries to get you to pay for repairs (it was an improper installation. That IS what you paid him for!!!), politely ask him to GTFO your property.
Seriously. You don't have to settle for inefficient crap made decades ago because the contractor doesn't understand the difference between grounding and bonding.
Also, if a contractor is trying to out on you, he's an installer. Nothing more. Every contractor that is signed up with a manufacturer will already know how to fix this, mitigate the issue, or at least k owns its the manufacturers responsibility to meet relevant fcc guidelines. If he doesn't know this, he has no relationship with the manufacturer, other than its what the parts house he has a line of credit at is pushing this week / month.
Ask me how I know......
--Shane
KD6VXI