| CPC B60H 1/246 (2013.01) [B60H 1/00378 (2013.01); B60H 1/00428 (2013.01); B60H 1/00692 (2013.01); B60H 1/00742 (2013.01); B60H 1/00835 (2013.01); B60H 1/00964 (2013.01); B60H 1/243 (2013.01); B60R 21/12 (2013.01); B60J 5/0486 (2013.01)] | 19 Claims |

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1. A barrier door, comprising:
a section including an outer stationary portion and an inner movable portion disposed within the outer stationary portion;
an actuator configured to move the inner movable portion between different positions to control flow of air between a protective enclosure and a volume outside of the protective enclosure; and
a controller configured to monitor one or more operating characteristics of the actuator and to modify an operational status of the actuator and control the flow of the air between the protective enclosure and the volume outside of the protective enclosure based at least in part on the one or more operating characteristics, wherein the actuator is powered by a ventilation system that directs the air between the protective enclosure and the volume that is outside of the protective enclosure.
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