[Customer1]

The largest amount of noise comes from the cold air dump. Closing the louvers on the dump does not quiet the system.

I removed the cover and used foil duct tape to block all air flow from the dump. Blocking the dump was a huge improvement. I repeat; a huge improvement.

Now we can actually hear the fan, the return air flow, and the compressor. My next project is to devise a new cover which incorporates a better air filter and moves the intake/return so it isn't a direct path.