Division 23 Mechanical

Division 23 Mechanical is also listed under the following categories: Standard Yellow Pages Heading (SYPH) Categories:

• Engineers Mechanical
• Mechanical Contractors

North American Industry Classification System (NAICS) Categories:

• Plumbing, Heating, And Air-Conditioning Contractors > Mechanical Contractors
• Engineering Services > Engineers Mechanical

Standard Industry Classification (SIC) Categories:

• Plumbing, Heating And Air Conditioning > Mechanical Contractors
• Engineering Services > Engineers Mechanical