Animal house sidewall inlet

An actuation assembly for controlling one or more air inlets of an enclosure, the assembly comprising:

• an actuation rod configured for lateral movement;
• at least one actuation cable, each of the at least one actuation cables comprising a first end and a second end, wherein the first end is attached to the actuation rod;
• at least one louver blade mounted between opposing side panels of an air inlet, each of the at least one louver blade being pivotable about a pivot axis between an open position and a closed position, wherein each at least one louver blade has an arm mechanism with one end of the arm mechanism configured to attach to a distal edge of the louver blade and an opposite end of the arm mechanism configured to receive and adjustably secure the second end of a respective one of the at least one actuation cables, wherein the arm mechanism comprises a pivot arm having a spindle on which a turn knob is mounted, wherein the turn knob is configured to receive the actuation cable, wherein the pivot arm is configured such that the spindle is located at a position that is further from a pivot axis of the louver blade than the distal edge of the louver blade thereby providing a larger moment arm so that less force is required to pull the louver blade between the open and closed positions.