Back to Knoll Environment About Knoll Environment Certifications Products Manufacturing Clean Technologies Energy Recycling Environmental Impact Packaging/ Transportation Manufacturing Sites Knoll has four manufacturing sites in North America: three in the U.S. and one in Canada. Each site has its special capabilities. All share the Knoll commitment to proactive leadership in manufacturing well–designed furniture in the most environmentally responsible way. Muskegon, Michigan Number of plants on site: 2 Product type: Metal furniture and components ISO status: ISO 14001 certified Grand Rapids, Michigan Number of plants on site: 1 Product type: Wood furniture ISO status: ISO 14001 certified Toronto, Ontario Number of plants on site: 3 Product type: Wood and plastic laminate furniture Steel and aluminum parts Office partitions ISO status: ISO 14001 certified East Greenville, Pennsylvania Number of plants on site: 2 Product type: Wood and plastic laminate furniture Seating Office partitions ISO status: ISO 14001 certified     Home > Environment > Manufacturing