• Car-Mon Products, Inc.

• Carmical Painting Service, Inc.

• Ceilcote Air Pollution Control

• Central Fan Company

• Chelsea Fans & Blowers

• Cincinnati Fan

• Classic Modular Systems, Inc.

• CleanZones, LLC

• Clestra Cleanroom

• Coast Products

• Columbus Industries

• Construction Design Technologies

• CosaTron

• Croll-Reynolds Co.

• Custom Hotel Painting

• DF Fan Services

• DISA

• Dal Pos

• DeHart

• Del Industries

• Delhi Industries Inc.

• Des Champs Laboratories Incorporated

• Dewalt Industrial Power Tools Co.

• Donaldson Co.

• Donaldson Company, Inc

• Ducts, Inc.