Another key feature is that the ACBs can remove rain, mist and snow from the air, helping the air stay dryer and reducing the load on any air conditioning, refrigeration or dehumidifying equipment. In addition, because there is no filter media catching that rain or snow there is nothing that will become wet or freeze up and prevent the air from passing through.
In addition, ACBs can pressurize the spaces so that air will flow out of the facilities and help prevent dusts and sand from blowing in.
Our ACBs were tested independently at an internationally-recognized filter-testing laboratory to establish their effectiveness. The testing found that standard models remove up to 98%+ of the mass of dust and other particles from the air. The laboratory results show that they remove virtually all particles larger than 10 microns and about 40% of the particles down to 3 microns from the air. The smallest particles most people can see are about 50 microns. Models under development will consistently remove sub-micron contaminants. Hence, they will help keep tunneling and mining dusts out of the control spaces, and they could do the same for the operator’s cabs in the equipment as well.