ACCO Engineered Systems was founded in 1934 as Air Conditioning Company (ACCO), a proprietorship, by Ira Prentiss Fulmor at 1005 Santa Fe Street, Los Angeles. The former name of the company was chosen to indicate what the company did because few people knew about air conditioning. In 1949, the business moved from downtown Los Angeles to Glendale at its present address. In 1950, ACCO transformed from an air conditioning distributor to become an independent corporation. Kenneth D. Simon was President from 1969 to 1980, Theodore M. Seidman was President from 1981 to 1989, and in 1991, John Aversano became President. ACCO has a corporate Board of Directors made up of inside officers and outside directors with four scheduled meetings per year, presided over by the Chairman of the Board.

Over the years ACCO has grown to become a leader in the design, installation, and service of industrial, commercial, high-rise, residential, and institutional air conditioning, heating, ventilation, plumbing, process piping, electrical and DDC control systems. ACCO’s name was changed in 2002 to ACCO Engineered Systems to better reflect the many aspects of its business. A national trade publication recently ranked ACCO among the 5 largest heating, ventilating, and air conditioning contractors in the nation. The company has an average of 1,525 employees. ACCO’s offices and manufacturing facilities occupy over 20 acres.

The construction work areas include office buildings, biopharmaceutical, semi-conductor, medical centers and hospitals, micro-electronics, manufacturing plants, entertainment, retail, telecommunications, educational facilities, data centers, and high rise residential. ACCO has completed work in Arizona, California, Florida, Hawaii, Illinois, Louisiana, Maryland, Michigan, Nevada, New Jersey, New Mexico, Oregon, Tennessee, Texas, Utah, Virginia, Washington, Washington D.C., and Mexico.

ACCO’s general offices are located in Glendale, CA, with other principal offices in San Leandro, Sacramento, Orange County, Azusa, San Diego, Bakersfield, Fresno, Petaluma, Redding, Vacaville, CA, Boise, ID, Las Vegas, NV, and Seattle, WA.

ACCO is a member of the Air Conditioning and Refrigeration Contractor’s Association, Sheet Metal and Air Conditioning Contractors’ National Association, Inc., the Mechanical Contractors Association of America, Inc., and Mechanical Service Contractors of America.