i worked in a nursing home and these were not only used for hydro, they were used for daily baths. it did have a chair on the front that was detachable so you could wheel it into the patients room,if they couldnt bear weight a lift was used to lower them in the chair , then you could wheel them right to the tub, hook them up and use a pedal to raise it and away they went. from my experience, most didnt like going up in the air, and alot were freaked out by the water going almost up to their necks. as for the temps. if it got to a certain temp an alarm would go off so you knew you were too hot. ours hand a hose built in and a few levers for soap and cleaner, some had a built in scale too .

Too bad you missed the toilets with the restraints on them...

I have a picture like that on my page, those were a popular model...hehe