Discloses is a control system (10) for use with a hot work habitat (12) in which an overpressure is to be established, and a method of use of the control system (10). The control system (10) comprises a shutdown module (20) for stopping the operation of apparatus for performing hot work within the habitat (12) responsive to a received alarm signal, when the control system (10) is used with a hot work habitat (12). Pressure sensing apparatus (26) for measurement of static pressure difference between the interior of a habitat (12) and external to a habitat (12), and at least one air speed sensor (38) for measurement of air speed outside of a habitat (12) are in communication with a pressure differential module (26). The pressure sensing module (26) is operable to calculate a threshold air speed value above which the static pressure difference is less than a predetermined pressure difference, and configured to send an alarm signal to the shutdown module (20) if an air speed value is detected above the threshold air speed value. Accordingly, the system (10) detects air movement with the potential to generate a dynamic pressure sufficient to cause a loss of containment in the habitat (12), and causes the hot work apparatus to be shut down.