D & E Business Class

D & E Business Class is also listed under the following categories: Standard Yellow Pages Heading (SYPH) Categories:

• Air Conditioning Equipment & Systems Cleaning
• Heating Contractors

North American Industry Classification System (NAICS) Categories:

• Plumbing, Heating, And Air-Conditioning Contractors > Heating Contractors
• Commercial And Industrial Machinery And Equipment (Except Automotive And Electronic) Repair And Maintenance > Air Conditioning Equipment Repair > Air Conditioning Equipment & Systems Cleaning

Standard Industry Classification (SIC) Categories:

• Plumbing, Heating And Air Conditioning > Heating Contractors
• Refrigeration & Air Conditioning Repair > Air Conditioning Equipment Repair > Air Conditioning Equipment & Systems Cleaning