An aircraft comprising a fuselage defining a longitudinal axis of the aircraft and a compartment inside the fuselage, wherein along the longitudinal axis, in cross-section perpendicular to the longitudinal axis, the compartment is enclosed by a floor structure and a sidewall and ceiling structure (11, 13) extending from and above the floor structure, wherein the aircraft further comprises: - an environmental control system comprising a conduit system through which in operation a fluid with an overpressure with respect to the interior pressure in the compartment is supplied, - at least one first terminal disposed inside the compartment and being in fluid communication with the conduit system, and - a selectively inflatable and deflatable partition element which - comprises at least one second terminal and is constructed such that it is inflatable from a deflated condition into an inflated condition by establishing a fluid communication between the at least one second terminal and at least one of the at least one first terminal, wherein in the inflated condition the partition element completely closes the cross-section of the compartment, thereby dividing it into two portions, and in the deflated condition collapses and at least partially unblocks the cross section, characterized in that each of the at least one first terminal comprises a first connector and each of the at least one second terminal comprises a second connector, wherein the first and second connectors (29, 47) are adapted to be matingly interconnected, thereby establishing fluid communication, and/or an interconnection tube is provided having mating connectors at terminal ends thereof, which mating connectors are adapted to be matingly connected to the first connector and the second connector, respectively, thereby establishing fluid communication. - an environmental control system comprising a conduit system through which in operation a fluid with an overpressure with respect to the interior pressure in the compartment is supplied, - at least one first terminal disposed inside the compartment and being in fluid communication with the conduit system, and - a selectively inflatable and deflatable partition element which - comprises at least one second terminal and is constructed such that it is inflatable from a deflated condition into an inflated condition by establishing a fluid communication between the at least one second terminal and at least one of the at least one first terminal, wherein in the inflated condition the partition element completely closes the cross-section of the compartment, thereby dividing it into two portions, and in the deflated condition collapses and at least partially unblocks the cross section, - comprises at least one second terminal and is constructed such that it is inflatable from a deflated condition into an inflated condition by establishing a fluid communication between the at least one second terminal and at least one of the at least one first terminal, wherein in the inflated condition the partition element completely closes the cross-section of the compartment, thereby dividing it into two portions, and in the deflated condition collapses and at least partially unblocks the cross section,