Modern dairy barns are equipped with ventilation systems to provide cows an optimum living environment the whole year round. In cold winter conditions it is necessary to install insulated curtains. Abbi-Aerotech delivers a double-walled system that can be inflated in extremely cold weather. The curtain works as a normal curtain and only filled with air when the curtain is closed. The curtain material is airtight and is more than just a roller blind. Air is blown into the curtain in the closed position by 1 or 2 pumps, depending on the height of the curtain. This saves energy and only requires smaller pumps. Curtain lengthes of 55 meter can be achieved and when placing the winchmotor in the middle of the sidewall, 110 meter can be bridged.