The Dachau Gas Chambers

Although it is well known that the Nazis used homicidal gas chambers in such camps as Auschwitz-Birkenau and Treblinka, it is not as well known that the Nazis actually constructed gas chambers, homicidal and otherwise in Dachau.

It may come as a surprise to many readers that Baracke X incorporates five gas chambers all of which were included in the original design. These were built and exist to this date. Most visitors to the Dachau Camp, drawn by horror to the main entrance of the crematorium and to the large room designated as a disguised homicidal gas chamber, rarely venture beyond these areas. The chamber (room # 8) is located next to a mortuary room, which in turn connects to the large area housing the four huge furnaces. 

In an essay at The Holocaust History Project website, Harry W. Mazal, OBE, discusses the evidence that theses chambers existed as well as their possible use.

http://www.holocaust-history.org/dachau-gas-chambers/