The airtight chamber was a device used to suck the oxygen out which would suffocate those trapped inside.
Richard Fisk then had Peter brought to a warehouse and had him placed in the airtight chamber and began to suck the oxygen out. However, Peter was saved by Daredevil.
Chameleon later captured Peter and Mary Jane Watson and brought them to Kingpin's mansion where both of them were placed in the airtight chamber. Fisk then began to drain the oxygen from the chamber. However, the police arrived and Terri Lee was able to free them.
Richard Fisk, Chameleon, and Susan Choi were then arrested.