Noisy alright
Even when not running, it has 6 nozzles along the sides which can be screwed shut and 3 jets at each end which are always open. Consequently any change in water level that crosses these open jets sets about a right gurgling racket as the water fills or drains from the pipes
( sandettie light vessel automatic New Twitter - @bollocksreally, Tue 5 Oct 2010, 22:42, 1 reply)

More like an Abrams charging into Baghdad.
My folk's jacuzzi, bought in a fit of mad enthusiasm for getting their bathroom refitted by the highest bidder, would shake the house at full chat.

Also, if it was used outside hot weather would cool the water down in 5 minutes flat.

Length? £6K and the plaster fell of after 6 months.
(all my scars face forward possesses 2.5% of a hyperalloy combat chassis, Tue 5 Oct 2010, 23:01, closed)

Yes!
You're right, it does act as a very large, very noisy heat exchange system.
( sandettie light vessel automatic New Twitter - @bollocksreally, Tue 5 Oct 2010, 23:44, closed)