Founded in 1934, BITZER manufactures refrigeration and air-conditioning technology, with compressor technology at the heart of its work. Headquartered in Sindelfingen, Germany, the group has 4,500 employees, 20 production sites and 74 locations worldwide as of 2025. Its long-running focus on natural refrigerants includes components for ammonia since 1973, hydrocarbons since 1990 and CO₂ since 1998, while its Green Point network and SCHAUFLER Academy extend that expertise into service and training.
CIMCO RefrigerationCIMCO Refrigeration traces its roots to 1913, when Thomas Shipley founded the Canadian Ice Machine Co.; the company took the CIMCO Refrigeration name in 1967 and joined Toromont Industries two years later. Now numbering more than 1,200 employees, CIMCO is best known for its long-standing role in ice-rink construction and for advancing natural-refrigerant thermal systems across North America. Its Burlington headquarters includes a 55,600-square-foot manufacturing facility opened in 2022, marking the company’s 110th anniversary.LANCASTER, PA
AERZENFounded in 1864, AERZEN engineers and manufactures machinery for compressing air, gases and vacuum applications, with its core expertise in blower and compressor technology. Based in Aerzen, Germany, the company now supports industrial customers in more than 100 countries through over 50 subsidiaries and approximately 2,500 employees. AERZEN also provides rental equipment and emergency support through its wholly owned AERZEN Rental Solutions subsidiary.COATESVILLE, PA
M&M CarnotM&M Carnot designs, manufactures, builds, and services industrial and commercial refrigeration systems and controls. Founded in 1969, the company says it has commissioned thousands of refrigeration solutions worldwide and has specialized in natural-refrigerant refrigeration, including ammonia and CO2 systems. M&M Carnot is now a product line of Johnson Controls.ANNAPOLIS, MD
HOERBIGERBorn from Hanns Hörbiger’s steel-plate valve invention in 1895, HOERBIGER develops performance-critical technology for compressors, automotive systems, precision positioning, rotary applications and industrial safety. The globally active group now employs more than 7,500 people at 150 locations in 40 countries, with particular strength in reciprocating-compressor components and gas-flow control. Its newer hydrogen work spans the value chain, including electrolyzer components and hydrogen-compression systems.GIRARD, OH