Proper Air Systems

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

• Sheet Metal Contractors
• Heating Contractors

North American Industry Classification System (NAICS) Categories:

• Plumbing, Heating, And Air-Conditioning Contractors > Heating Contractors
• Other Building Finishing Contractors > Sheet Metal & Duct Work > Sheet Metal Contractors

Standard Industry Classification (SIC) Categories:

• Plumbing, Heating And Air Conditioning > Heating Contractors
• Roofing, Siding, And Sheet Metal Work > Sheet Metal & Duct Work > Sheet Metal Contractors