Indoor Air Quality

Indoor Air Quality is also listed under the following categories: Standard Yellow Pages Heading (SYPH) Categories:

• Appliances Household
• Radon Testing & Services

North American Industry Classification System (NAICS) Categories:

• Household Appliance Stores
• All Other Professional, Scientific, And Technical Services > Inspection & Testing Services > Radon Testing & Services

Standard Industry Classification (SIC) Categories:

• Household Appliance Stores
• Business Services, Nec > Inspection & Testing Services > Radon Testing & Services