Yes. Documents and survivor accounts (e.g., Henryk Tauber) confirm Auschwitz gas chamber doors were wooden: double-layered boards with suprema insulation, metal fittings, felt seals for airtightness, and a glass peephole with inner protective grid. Wooden doors also worked for Zyklon B delousing. The photo shows a non-original door in the postwar-reconstructed Auschwitz I site, not an operational gas chamber door.