The Modular Curved sidewall inlet with Rod/Cable/Pulley operator optimizes air throw and distribution. These vents use robust lift hardware and stainless steel swivel pulleys for long life. The vent is constructed of PVC, ABS, and stainless steel. This makes the product is durable, which is key for poultry and livestock environments. Suitable for shorter runs of vents or where there isn't enough space to install rack & pinion operators. A "helper spring" is included to start the opening process even with wind suction acting on the building. The low thermal conducting frame minimizes condensation around the vent in cold climates. The inlet comes complete with rubber seals & brush seals to eliminate air leakage when the baffle is closed.  There are optional Air Intake Hoods available to protect the inlets from driving rains. The Modular Curved vents are available in several standard sizes. They can be ordered in custom sizes to create a "best fit" for any environment. If you would like to learn more contact us here.