Associated Environmental Systems (AES) was founded in 1959 and has designed, manufactured, and supported environmental test chambers continuously since. The company is headquartered in North Chelmsford, Massachusetts, and maintains a sales and service office in Santa Clara, California. As of 2026, AES employs approximately 64 people. A third-party revenue estimate (RocketReach, 2026) places annual revenue at $18.2 million; AES does not publish official revenue figures. CEO as of 2025 is Michael Shirley. All AES chambers are engineered and manufactured in the United States. AES has announced a move of its headquarters location scheduled for July 2026, from its current address at 8 Post Office Square, Acton, MA, to a new facility. The company's website as of late 2025 lists the headquarters as North Chelmsford, Massachusetts.
A patent for the ATPPRIME battery testing solution, filed in 2019, was issued on September 8, 2022. AES moved into a 50,000 square-foot manufacturing facility in Acton, MA, with more than 20,000 square feet of office space as a documented milestone. AES participates in The Battery Show North America (Detroit, October 2025) and the Advanced Automotive Battery Conference Winter 2025 (Las Vegas, December 2025).
Product line: environmental test chambers
SC series — temperature-only chambers. Benchtop and floor model temperature-only chambers. As of April 30, 2024, AES gained UL 61010-1 certification status for the SC series. The UL 61010-1 certification covers safety standards for electrical equipment intended for measurement, control, and laboratory use.
SCH series — temperature and humidity chambers. Temperature with humidity test chambers. UL 61010-1 certification obtained April 30, 2024 for the SCH series benchtops and small floor models under 13 cubic feet.
FD and HD series. 10 and 13 cubic foot models. UL 61010-1 certification obtained for these models as of April 30, 2024.
Stability chambers. Chambers for steady-state stability testing applications.
Salt spray chambers. Corrosion test chambers for salt spray testing. The salt spray testing context is at Salt Spray Chambers: What the Test Measures and What It Doesn't Tell You About Corrosion.
Thermal shock chambers. Two-zone chambers for rapid temperature transition testing. The thermal shock testing methodology is covered in Thermal Shock Testing: Why Slow Ramps Miss the Failures That Matter.
Laboratory ovens. Heating and drying ovens for laboratory applications.
Custom solutions. AES describes custom chamber engineering as part of its standard offering. The custom chamber context is at Custom Environmental Test Chambers: When Standard Configurations Don't Fit the Test.
Battery testing product line
AES has developed a battery testing product line centred on integration with environmental test chambers. Three documented products:
ATPPRIME. A patented system (US patent issued September 8, 2022, application filed 2019) for high-density testing of batteries within an environmental test chamber. Described as covering multiple cell types and high amperage testing.
ATP Adaptable. Described as building on ATPPRIME with a high-amperage solution for large-format batteries, including EV batteries and energy grid storage, handling testing up to 1,000 amps.
ATPHEAVY Adaptable. Introduced at a trade event in December 2023 where AES was a finalist for Best of Show award. Described as a groundbreaking battery testing solution engineered for all battery formats and sizes.
FUSION. Described as a fully integrated battery testing system developed in partnership with Maccor, a battery test equipment company.
AES's TÜV Rheinland (TUV) partnership is documented: TUV audits and determines whether AES products sufficiently comply with UL 61010 standards. The EV battery testing context is at EV Battery Environmental Testing: The Chamber Conditions That Separate Safe Packs from Dangerous Ones.
Service network
AES provides calibration, preventive maintenance, installations, and retrofits for its own chambers and for chambers from other manufacturers. The service network covers regional teams in California, Michigan, Texas, Pennsylvania, Ohio, and New York, with expansion ongoing. This third-party service capability — servicing competitor equipment — is a documented differentiator in AES's published positioning. The calibration context is at Environmental Test Chamber Calibration: What It Covers, What It Doesn't, and What to Do About the Gap.
Documented customers
Customers listed in AES's published materials include: Segway, Analog Devices, Whirlpool, Boeing, Honeywell, Goodyear, General Dynamics, and Teledyne. AES states its total customer base numbers in the thousands.
Segments not in the published catalogue
AES does not publish HALT/HASS chambers with six-DOF pneumatic vibration tables, thermal vacuum chambers for space simulation, walk-in drive-in automotive climate chambers, or pharmaceutical stability chambers under ICH Q1A as dedicated product lines. The full manufacturer comparison is at The Top 10 Environmental Test Chamber Manufacturers in the World.
Contact
Headquarters: Associated Environmental Systems, North Chelmsford, Massachusetts, USA. (Office move to new facility planned for July 2026.) Sales and service office: Santa Clara, California. Website: associatedenvironmentalsystems.com