ASHP manufacturers have sat up and listened to this, and now you can get ‘super silent’ ASHP’s to suit.  The Daikin split I worked alongside a while back was horrible, and a bit like a washing machine on spin, ?, no ta. Noisy, and vibrations a plenty.  A well designed, well thought out installation will not be noisy, and you can direct the sound from the fan at a living barrier to absorb any residual noise from it too.  You can make big mistakes about where to site this, from an acoustic n