Abstract: Apparatus and methods to automatically release a respirator device at least from a wearer's face. For a respirator mask, such apparatus includes a securement device, which fits around at least the rear side of a wearer's head, and one or more couplings which are configured to releasably secure the respirator mask with the securement device around the wearer's head. For a respirator hood, a neck dam is used as the securement device. Pressurized, breathable gas is supplied to the wearer through the respirator device and to the coupling(s) to secure the device to the wearer's head and, if and when pressure of the gas supplied to the device drops below a critical level, the pressure of the gas supplied to the actuator(s) also drops sufficiently for the actuator(s) to change states and allow the coupling(s) to separate, thereby releasing the device. Manual and/or remote release can also be provided.