75 Years of Excellence

STULZ Air Technology Systems, Inc. (STULZ USA) is proud to research, design, manufacture, test, deliver and support products and solutions for mission critical applications, from STULZ' headquarters in Frederick, Maryland, as well as our second manufacturing facility in Dayton, Tennessee. 

Climate. Customized.

STULZ is a privately owned, global manufacturer of highly efficient temperature and humidity management products and solutions.  STULZ engineers a full line of precision air conditioners, air handlers, ultrasonic humidifiers, desiccant dehumidifiers and custom solutions, specifically for industrial, commercial and mission critical applications. 

STULZ has never strayed from its customer-first focus. This focus is the cornerstone of STULZ’ global vision and is demonstrated through a commitment to local manufacturing.

STULZ believes that every region of the world has specific mission critical cooling needs and that only by manufacturing in the relevant market can you know precisely what your customers want. This is why STULZ has production sites in the world’s major growth regions. Cooperating globally, producing locally: For every region, STULZ supplies tailor-made products for individual customer requirements.

  • 11 Production Facilities Globally, 2 in the USA
  • Presence in 130 Countries
  • Over 5,000 Employees Worldwide
  • Extensive North American Presence with
    • 400+ Employees
    • 2 Manufacturing Facilities
    • 218,000 sq. ft. of Manufacturing and Office Space
    • Hundreds of Sales & Service Partners
  • Joerg Desler, President of STULZ USA

    “It is an unfortunate, yet common reality that many companies will produce the majority of their components overseas and then claim to be ‘Made in America’, simply because the final assembly occurs domestically. At STULZ, we do our own engineering, metal stamping, electrical wiring, powder coating, controls programming, piping, and testing.  To us, this is what ‘Made in America’ means.”

Global Presence

STULZ USA is a member of the global STULZ family, with two major divisions, seven production plants, and hundreds of sales and service partners around the world.  Wherever you are, STULZ is globally close to you.

Visit STULZ Worldwide


Cooling Technology Leader

STULZ is the technology leader, providing cooling solutions and services for mission critical applications.  This is accomplished through the design and manufacture of highly energy efficient temperature and humidity control equipment for commercial and industrial applications.

Energy Efficiency is at the core of every STULZ Product - including our HQ/Factory's 950 kW solar array.

Pre-Engineered Solutions

STULZ products are available in a variety of configurations and options based on our factory designed and tested components and modules. We can also provide a custom touch to adapt our products to meet your specific needs.

Breadth and Depth

With more than 40 years of expertise in controls, economizers, and mission critical solutions, STULZ offers the largest portfolio to fill any and all precision cooling needs.

ISO Certified

As part of our commitment to quality, STULZ USA is ISO-9001 Quality Registered.

  • Contact Us

    North American Headquarters

    STULZ Air Technology Systems, Inc. (STULZ USA)
    1572 Tilco Drive
    Frederick, MD 21704

    Call us: (301) 620-2033

    Email us

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