Custom Duct Systems

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

• Air Conditioning Contractors
• Duct & Duct Fittings

North American Industry Classification System (NAICS) Categories:

• Plumbing, Heating, And Air-Conditioning Contractors > Air Conditioning Contractors
• Plumbing And Heating Equipment And Supplies (Hydronics) Merchant Wholesalers > Plumbing Fixtures & Fittings > Plumbing Fixtures & Fittings - Duct & Duct Fittings

Standard Industry Classification (SIC) Categories:

• Plumbing, Heating And Air Conditioning > Air Conditioning Contractors
• Plumbing And Heating Equipment And Supplies (Hydronics) > Plumbing & Hydronic Heating Supplies, Nec > Duct & Duct Fittings