Its nice how the really big ones have exhaust venting,  at both ends of the machine,  my experiences with the pictured single tank model was Very HOT,  in the 1970's  there was a square ventilator above the machines, I remember.  Trivia,  the splash curtains on the ends were made of canvas until the health dept outlawed them or plastics evolved into something that could survive the heat and chemicals.  alr