We got ours from Octopus, and had our survey in July 2022, installed August, cost £3500 (after gov grant). It's at the front of the property, facing a road. It's not 8m from next door's windows It's not on concrete, we dug a shallow hole and filled it with gravel, but it can be wall mounted. It makes hardly any sound, just a gentle rumble like a fridge. We had a few of our rads upgraded as part of the contract