About ACCO

Building Confidence in Mechanical
Design, Construction & Service

Mechanical systems are the heart of buildings. They make buildings more marketable, more comfortable, and more profitable. A properly designed, installed, and maintained mechanical system conserves energy, cuts absenteeism, increases productivity, and reduces tenant turnover. It can save an owner a great deal of money.

Since 1934, owners and builders have selected ACCO Engineered Systems to design, install, and maintain hundreds of thousands of mechanical projects.  ACCO is an employee-owned company dedicated to the design, fabrication, installation, maintenance and service of commercial and industrial HVAC, refrigeration, plumbing, process piping, and building automation systems.

ACCO has gained a wealth of knowledge since its founding, and has grown to be the largest and most experienced environmental firm in the Western United States, and among the top three nationwide.

Whether your project is a low or high-rise office building, a shopping mall, hospital, semi-conductor fabrication facility or pharmaceutical manufacturing plant…ACCO can design, build, install, and maintain a mechanical system to meet your needs.

ACCO has found success by evaluating overall system performance, ease of installation, reliability and long term energy consumption costs, and how these variables relate to an owner’s needs.  Through innovative engineering, comprehensive design solutions, consistent work quality, and qualified maintenance; ACCO confidently delivers the best possible solution.

ACCO offers complete in-house engineering, fabrication, installation, commissioning, and service capabilities. This integrated delivery system provides customers with the most practical, cost effective solutions for their particular mechanical and control system requirements.

ACCO is licensed in the States of Arizona, California, Florida, Hawaii, Idaho, Nevada, Oregon, Utah and Washington.

ACCO’s driving force is to satisfy the complex, engineered systems needs of buildings/facilities. We do this in a valued-added, cost effective one-stop shop manner by:

• Using our best in class know how to deliver customized, value-added systems at a competitive level

• Structuring exceptional value deals

• Leveraging our Project Management and delivery capability to take control, deliver with speed, and provide a single point of accountability

ACCO’s Mission

Our mission is to provide our customers with the most cost-effective mechanical systems for their facilities through the integration knowledge of engineering, construction, and service.

ACCO’s Beliefs & Values

The well-being of our employees is essential to our success.

We are committed to our customers and products for life.

Our suppliers need to be partners in our responsibility to our customers.

The health and safety of our employees, customers and the public are never to be compromised.

By delivering quality and value to our customers, our stakeholders will receive a fair return on their equity.

Employee ownership is the wellspring of our success.

Strong relationships are based on performance and ethical standards.


ACCO History

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 where it transformed from an air conditioning distributor to become an independent corporation.  After 70 years in Glendale, ACCO moved to its headquarters to 888 East Walnut Street in Pasadena.  Jeffrey Marrs became ACCO’s fifth President & CEO in 2016.

Over the years ACCO has expanded its leadership role 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 has consistently ranked ACCO among the 3 largest heating, ventilating, and air conditioning contractors in the nation. The company, including its subsidiaries, has an average of 3,000 employees, and offices and manufacturing campuses that occupy more than 20 acres, spanning 32 locations.

ACCO’s mechanical systems occupy facilities in a wide variety of industries, including commercial office space, biopharmaceutical R&D, semi-conductor, micro-electronics, medical/healthcare centers, manufacturing plants, entertainment, retail, telecommunications, education, data centers, and high rise residential.

ACCO has completed work in Arizona, California, Colorado, Florida, Hawaii, Illinois, Louisiana, Maryland, Michigan, Nevada, New Jersey, New Mexico, Oregon, Tennessee, Texas, Utah, Virginia, Washington, Washington D.C., and Mexico.