About Parameter Generation & Control


With over 40 years of experience, Parameter provides customers with reliable, precise and efficient temperature and humidity control equipment. As past Parameter President Clay Hile explains, “We have always focused on building the best, most reliable humidity temperature conditioners and chambers on the market. This makes it easier for us to compete with better known companies.” 

Renowned for its stability and dependability, our technologically advanced products continually surpass expectations for quality and efficiency. Parameter offers technical expertise, regulatory compliance, insight and practical hands-on operational knowledge to a wide range of industries, including , electronic, semiconductor, packaging (TAPPI) and textiles.

Have questions? Parameter supports the superior craftsmanship of our products with readily accessible and knowledgeable customer-service experts.

Our Vision

Providing the world with high quality solutions that you cannot find anywhere else.

Our Mission

To design, manufacture, and service precise temperature and humidity control equipment that facilitates customer innovation through scientific and environmental testing and storage.

Parameter will strive to continuously improve our products while providing a fulfilling environment for our employees that allows for continued personal and professional growth.


  • Walk-in Stability Rooms – Walk-in humidity control rooms. Parameter supplies an assembly of walk-in rooms using modular, insulated panels. Popular for pharmaceutical stability studies, TAPPI labs, product testing, and many more applications.
  • Reach-In Stability Chambers – Parameter partners with Binder GmbH to provide our customers with high-quality reach-in chambers. Please contact us for a full selection of our partner offerings.
  • Conditioners – Self-contained conditioning systems for precise temperature and humidity control. Units are available in both vertical and horizontal configurations and allow for control within a tolerance of ±0.5% RH /±0.2°C.
  • Supplementary Services – Parameter aims to offer our customers a turnkey solution to their needs. We offer a wide range of related services for our customers, such as sensor calibration, monitoring, and validation. Our service department is also available day or night to provide technical support.




Parameter is committed to a high level of excellence in all aspects of our work. Our conditioning units are expertly designed and manufactured using durable, high-quality stainless steel. Our walk-in rooms are constructed of modular, insulated panels to ensure maximum uniformity and efficiency. Parameter is cGMP compliant and ISO 9001:2015 certified.


Our standard of excellence also extends to our customer service. We pride ourselves on providing timely, transparent communication through every stage of your project. And after your project is completed, we continue our support through our experienced service and maintenance department and an annual free service seminar.


At Parameter, we understand the importance of reliability to our customers. That is why we assemble and exhaustively test each piece of equipment at your specified condition before it leaves our facility. With tight tolerances and unsurpassed uniformity, we enable industry professionals to reliably conduct product testing while eliminating the fear of going out of condition.


One of the big questions you may have is “What will all of this cost?”. Parameter equipment is competitively priced and can even save you money in space and energy savings. Low energy costs and low cost to own make Parameter equipment a truly worthwhile investment for your buck.


With standard options available for quick delivery, we also have the capability of providing user specific solutions. Our team of expert engineers will provide their insight to determine the best solution for your temperature and humidity control needs. Conditioners are available in both horizontal and vertical configurations to best suit the needs of your space, and walk-in rooms are fully customizable with options for shelving layouts, lighting, finishes, and more.


From adopting the two-temperature method as our standard control method to developing a single conditioner that can control two rooms at different conditions, Parameter is built on innovation. We aim to innovate with our customers in mind, such as creating a conditioner that attaches directly to the wall of a room to save floor space and allow for exterior service accessibility.


Parameter Generation Control helps a wide variety of businesses become successful in their endeavors with our trusted products and services. Some real-world examples of PGC products being used in various industries include:


Parameter Generation and Control is a small-town company with global reach. Based in Black Mountain, North Carolina, Parameter serves customers from regions both near and far. Whether you’re as close as Raleigh and Charlotte or as far as China, Parameter is there to provide precise humidity control for your industry needs.

Think that offsite storage might be a better solution for your needs? Parameter partners with Precision Stability Storage to provide our customers with flexible offsite stability storage and biostorage options.


Parameter is headquartered in:

1054 Old US Highway 70 W
Black Mountain, North Carolina 28711


Parameter Generation and Control is a world-renowned manufacturer of precise temperature and humidity control equipment. Our method of humidity control is a simple yet effective solution for precisely controlling temperature and humidity at your specified condition.

We know that you have many choices for your humidity control needs, but we are confident that by choosing Parameter, you are choosing reliability and longevity.

Our commitment to excellence is further underscored by our active involvement in key industry organizations, which keeps us at the forefront of technological advancements and standards in humidity control. Below is a list of professional memberships and organizations that Parameter Generation & Control is proud to be a part of:


Join the growing list of Parameter clients.

Please provide us with some basic information about your needs, and we’ll contact you to begin the quoting process.

If you’d rather start the conversation over the phone or by email, contact our sales department at 828-669-8717 or sales@humiditycontrol.com.




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