Abstract: Plural vertically aligned curtain sections form a first wall of a structure and are each coupled to a respective manual or powered rotary drive by means of a respective elongated, roll-up rod disposed in a lower hem, and extending the length, of the curtain section. The rotary drives are attached to horizontally spaced, vertical tracks for limiting the vertical drives, the roll-up rods and each curtain's lower hem to vertical motion in rolling up and unrolling the curtain sections. A water curtain maintained in a moist condition is disposed adjacent the inner surfaces of the curtain sections, with fans disposed on a second opposed wall of the structure for drawing air through the space occupied by the curtain sections for providing moist airflow through the structure's interior. Moist airflow and cooling are precisely controlled by controlling the gap between a pair of adjacent vertically spaced curtain sections.

Abstract: Plural vertically aligned curtain sections form a first wall of a structure and are each coupled to a respective manual or powered rotary drive by means of a respective elongated, roll-up rod disposed in a lower hem, and extending the length, of the curtain section. The rotary drives are attached to horizontally spaced, vertical tracks for limiting the vertical drives, the roll-up rods and each curtain's lower hem to vertical motion in rolling up and unrolling the curtain sections. A water curtain maintained in a moist condition is disposed adjacent the inner surfaces of the curtain sections, with fans disposed on a second opposed wall of the structure for drawing air through the space occupied by the curtain sections for providing moist airflow through the structure's interior. Moist airflow and cooling are precisely controlled by controlling the gap between a pair of adjacent vertically spaced curtain sections.

Abstract: A roll-up curtain assembly includes plural, vertically spaced, horizontal roll-up rods extending across an opening. Each roll-up rod is coupled to a respective flexible curtain section and an electric motor. Actuation of the electric motor in a first direction of rotation causes rotation of the roll-up rod in a first direction for rolling the flexible curtain section onto the rod and moving the curtain assembly to the retracted, or open, position. Actuation of the electric motor in a second, opposed direction of rotation lowers the roll-up rod resulting in an unwinding of the curtain section from the rod allowing the curtain assembly to assume the extended, or closed, position. Plural vertically spaced curtain sections each having a respective motor/roll-up rod combination are coupled together and move upward or downward in unison.