Abstract: A double wall fabric panel unit for use as a wall section in the construction of inflatable buildings comprising an elongated exterior fabric envelope panel having a plastic coating on each side, and an elongated thermal liner panel having side edge strips heat-sealed to the exterior panel. The thermal liner has a foil layer facing the exterior panel and a white plastic layer on the opposite side. The side edge strips are periodically interrupted to provide air passageways to vent air from between the panels when the unit is rolled.

Abstract: A wall vent preferably for use in a high-rise building is releasably opened for venting a fire in the building. The vent comprises a frame, a window or venting panel that is pivotally for biasing the venting panel to an open position and latch means for maintaining the panel in a closed position. The latch means may be either manually or electrically released or released upon detection of heat or smoke, and may be released either at the panel or remotely. Each wall vent is also preferably releasable to an open position from a story of the building therebelow.