Guardian Technologies is also listed under the following categories: Standard Yellow Pages Heading (SYPH) Categories:

• Air Purification Equipment & Systems

North American Industry Classification System (NAICS) Categories:

• Warm Air Heating And Air-Conditioning Equipment And Supplies Merchant Wholesalers > Air Purification Systems

Standard Industry Classification (SIC) Categories:

• Warm Air Heating & Air Conditioning > Air Purification Systems