Powered exhaust apparatus for a personal protection respiratory device

摘要

The present invention relates to an exhaust apparatus 10 for releasable or permanent connection to a personal protection respiratory device 20 that defines a filtered air volume adjacent to the face of a wearer and comprises at least one exhalation valve 26. The exhaust apparatus 10 comprises a powered blower 16 in fluid connection with the at least one exhalation valve 26, the blower 16 being operable to draw a portion of the wearer's exhaled breath through the at least one exhalation valve 26. The apparatus can relieve a build-up of humidity and heat.