Ensure maximum respiratory safety on the jobsite with the Air Systems International BB30-CO Breather Box®. This rugged, portable filtration panel is the industry standard for delivering safe, Grade-D breathing air to up to two workers [0.5, 0.6]. Engineered for harsh industrial environments, it features an integrated, continuous carbon monoxide (CO) monitor and a powerful 3-stage filtration system [0.2, 0.13] that removes 99.99% of contaminants.