[toothrot]

Turns out cities are loud! In NYC, at least, heat pumps are far more quiet than the endless window unit A/C's, or larger traditional A/C's, in my experience.

Outdoor noise is less of an issue in the winter in big cities because windows are closed.

[wussboy]

Most of the noise in cities is cars. One idiot on a Harley drowns out a warehouse of heat pumps

[belter]

Sounds like an installation can be really tricky or you will end up with something like this: https://youtu.be/1rKNT7-42J0?t=1510