I imagine price and noise are not mutually exclusive. I used to stay over at a mate's parents' who had one (not sure what model), but flushing during the night was verboten such was the wall shuddering howl of the thing.
I've got a couple at the clinics I look after. Expensive medical versions and they aren't at all quiet I'm afraid. After all they have to chew up what ever goes down the pan and pump it away.
I imagine price and noise are not mutually exclusive. I used to stay over at a mate's parents' who had one (not sure what model), but flushing during the night was verboten such was the wall shuddering howl of the thing.