In early 1943, the Topf & Söhne fitter Heinrich Messing installed exhaust fans in the Auschwitz II crematoria and also in the gas chambers.
Initially, the process of gassing prisoners and then letting fresh air into the gas chambers lasted several hours, but after the exhaust fans were installed this was reduced to about an hour, thus reducing the turn around time.
In early 1943, the Topf & Söhne fitter Heinrich Messing installed exhaust fans in the Auschwitz II crematoria and also in the gas chambers. Initially, the process of gassing prisoners and then letting fresh air into the gas chambers lasted several hours, but after the exhaust fans were installed this was reduced to about an hour, thus reducing the turn around time.
Topf and Sons