Air Treatment Corporation is a 100% employee-owned wholesale company headquartered in Brea, California. The company was founded in 1982 as a manufacturer’s representative in the HVAC industry. The company serves various markets across the western region, operating from eight office locations in California, as well as maintaining offices in Hawaii and Guam. Although its HVAC services are primarily focused on these geographical areas, Air Treatment Corporation's Refrigeration services extend to regions including Phoenix, Nevada, and Utah. Air Treatment Corporation is well-prepared to support a wide range of clients, including end users, consulting engineers, and mechanical contractors, offering solutions for new construction and retrofit projects. 

In 2016 Air Treatment Corporation became an employee-owned company when they implemented an Employee Stock Ownership Plan (ESOP). Through the ESOP, employees are given an ownership interest in the company. The team at Air Treatment Corporation is committed to helping its customers solve their unique challenges. Clients are encouraged to bring forth their most demanding projects, with the assurance that the company will not only meet but exceed their expectations. This commitment extends from the project's inception through its successful execution and closeout.