275986 - Miller BreatheAir 4-Person Portable Filtration Box with 5 PPM CO Alarm

Advanced Respiratory Protection with Grade-D Air Filtration

The Miller BreatheAir™ Portable Box (Model 275986) is a high-performance, four-person filtration system engineered to provide Grade-D breathing air in demanding industrial environments. Designed specifically to meet Canadian safety standards, this unit features an integrated Carbon Monoxide (CO) monitor with a strict 5 ppm alarm set point. This ensures that operators are immediately alerted to hazardous CO levels, significantly reducing reaction time and enhancing overall worksite safety. The system is an essential component for facilities utilizing Supplied Air Respirators (SAR), such as the Miller C50 system, bridging the gap between compressor output and breathable air requirements.

Three-Stage High-Efficiency Filtration

To achieve Grade-D air quality, the BreatheAir™ system employs a robust three-stage filtration process. The first stage effectively removes 95% of bulk liquids and particulates down to 5.0 microns, protecting the downstream filters and the user's airway. The second stage targets fine contaminants, eliminating 99.99% of oil mists and particulates as small as 0.01 microns. Finally, the third stage utilizes activated carbon to scrub organic vapors, odors, and tastes from the air stream, ensuring the air is not only safe but comfortable to breathe. An automatic condensation drain further optimizes performance by preventing moisture buildup, thereby extending the service life of the filter elements.

Operational Efficiency and Monitoring

Built for the rigors of industrial use, the BreatheAir™ box is housed in a durable, impact-resistant case yet remains lightweight at just 26.4 pounds for easy portability. The unit supports up to four users simultaneously with a total flow capacity of 123 CFM. User-friendly features include external warning lights and high-decibel audible alarms that provide clear status indications even in noisy environments. Additionally, integrated filter change indicators eliminate maintenance guesswork by visually signaling exactly when filter elements require replacement. Calibration of the internal CO monitor is streamlined and efficient, taking less than two minutes to complete, which minimizes downtime and maintains continuous compliance.