The present invention consists in applying on the lid of the mortuary zinc coffin an inlet valve and one or two vent valves, connected with two flexible pipes to a container inflatable air chamber container, which acts as a lung and as filter to gases and stench of decomposition. The air chamber container is composed of one or two inlet valves and a vent valve, and is positioned between the lid of the zinc coffin and the lid of the wooden coffin. The air chamber container acts as a lung and lowers the internal pressure. An optional sanitizing purifying filter of shape and appropriate measure may be positioned between the cover inside of the zinc coffin and the lid of the wooden coffin and it is connected to the outlet valve, allowing the vent, the purification and the emission of sanitized air outside the coffin.
