Ch 4 Systems Inc

Ch 4 Systems Inc is also listed under the following categories: Standard Yellow Pages Heading (SYPH) Categories:

• Gas Fitters
• Mechanical Contractors

North American Industry Classification System (NAICS) Categories:

• Plumbing, Heating, And Air-Conditioning Contractors > Mechanical Contractors
• Other Building Material Dealers > Heating Equipment (Including Hydronic) > Gas Fitters

Standard Industry Classification (SIC) Categories:

• Plumbing, Heating And Air Conditioning > Mechanical Contractors
• Plumbing And Heating Equipment And Supplies (Hydronics) > Hydronic Heating Equipment > Gas Fitters