What glass-sided indoor smoker is associated with Chicago-style barbecue?

What glass-sided indoor smoker is associated with Chicago-style barbecue? An aquarium smoker. This enclosed smoker is named for its resemblance to a fish tank, with glass panels that let cooks watch the meat and fire inside.

The aquarium smoker was invented in Chicago in 1954. Its enclosed design was especially useful during the city’s cold winters: wood or charcoal could burn indoors while a metal chimney carried smoke outside. The design helped barbecue restaurants continue smoking meat without relying on an outdoor pit.

Aquarium smokers became closely associated with South Side and West Side Chicago barbecue. They are commonly used for rib tips, hot links, and other inexpensive cuts, with hickory and oak among the typical woods. The smoke chamber’s temperature can be controlled through airflow and fuel management; traditional accounts also describe cooks spraying an overly hot fire with a garden hose.

The main confusion is with a bullet smoker or offset smoker. Those are recognizable smoker designs, but neither specifically refers to Chicago’s glass-sided indoor barbecue equipment.