The HEPA filters found in industrial-grade air purifiers are exact to the size

The Hunter HPAW10 Air Purifier is the best air purifier to be used in large indoor spaces , such as classrooms at home, office, open space or industrial location! Air Max HPAW10 can filter up to 1000 cubic yards of air in a space. It Air Max HPAW10 also uses built-in VOC sensors to ensure that the system will automatically control the speed of fan based on the quality of indoor…