AutoVent LLC 11 Speltz Lane , Oley , Pennsylvania 19547 USA About Solutions products Publications videos Downloads Companies AutoVent LLC Products AutoVent - Model CMC-0400 - Manual Switch Control AutoVent - Model CMC-0400 - Manual Switch Control From Curtain Motor 0 Share Allows easy operation with rugged switches. Single Circuit or Two Circuit manual power supply. Note: 2 circuit manual power supply does not increase its. capacity; only allows individual control of 2 motors. Downloads related to this product Curtain Motor Brochure Customer reviews No reviews were found for AutoVent - Model CMC-0400 - Manual Switch Control. Be the first to review! Add your review Publish your review Great! review successfully added!