Abstract: A safety helmet fan system includes a safety helmet comprising a mount slot and a housing comprising a body having a fan enclosure, a mount configured to engage the mount slot to removably attach the housing to the safety helmet, and a hinge connecting the body to the mount, wherein the mount is engaged to the mount slot and the hinge is configured to allow the body to rotate, relative to the mount, between a cooling position and a stowed position wherein in the cooling position a rotational axis of the fan is below an axis of rotation of the hinge, and in the stowed position the rotational axis of the fan is above the axis of rotation of the hinge.