The largest commercial HVAC manufacturer is Carrier Corporation. Carrier is a subsidiary of United Technologies Corporation and is one of the world’s leading providers of heating, ventilation, air conditioning, and refrigeration systems. Carrier offers a wide range of products and services, including commercial and residential HVAC systems, air filtration systems, and energy-efficient solutions. Carrier is also a leader in the development of innovative technologies, such as variable refrigerant flow systems and advanced air filtration systems. Carrier’s products are designed to meet the highest standards of quality and performance, and are backed by a global network of service and support.