[spikej]

There must be a more aesthetically pleasing option...

[OJFord]

As a Briton not used to these things at all, I would think surrounding it in sandbags is the more aesthetically pleasing option.

[jfk13]

As a Briton, I can't help thinking that once the unit is in place, with its double-wall sandbag enclosure (including 4' service space), I won't have any garden left.

[sirmike_]

Why bother building the other three walls? Wouldn’t one SB wall between the unit and the exterior wall of the building cut down the noise enough?

[jfk13]

Well... supposing I did have a bit of garden left, I might like to enjoy it in peace without hearing a constant noise of machinery.