KB Duct brand is a leader in standard, modular ducting systems (clamp-together and flanged), individual components and application-specific duct solutions for industrial dust, fume, mist and air handling systems. KB Duct began as a part of our Kirk & Blum brand, which has been in operation since 1907.

KB Duct provides the widest range of ducting systems, individual components and application-specific duct solutions for industrial dust, fume, mist and air handling. We offer the fastest delivery on clamp-together duct from 3” to 24” in 22-gauge to 10-gauge, depending on diameter, and flanged duct in diameters you can drive a truck through as heavy as 1/4” material.

• A complete offering of industrial ducting - flanged and clamp-together
• Individual components or complete systems, including all accessories
• Custom and heavy fabrications
• Custom development of special products - You draw it, we can make it!
• Free design services - We can turn the roughest drawings into full 3-D system designs
• Highest quality
• Full service and support at all levels
• Fastest delivery in the industry