Sulfurous smells from a paper mill are unforgettable, but easily 
          removed from air with 
          Gray Matter ® 
          air filters.
          Candidates for conversion:
          - central HVAC systems
          - room air cleaners
          
          
          Paper mills can become better up-wind neighbors by 
          recommending  
          Gray Matter ® 
          
           filters to down-wind neighbors.