The most commonly used airflow control device is the Terminal box, or VAV box. While this device has always done a great job of providing tempered air into a space for comfort control, it typically falls short when trying to maintain directional airflow or proper pressurization.
Back in the 1980s, Phoenix Controls began developing and modifying a venturi valve for use in laboratories where fume hoods were being used. The traditional approach to these spaces was the VAV box and while they did a good job of maintaining temperature, they demonstrated an inability to consistently provide proper airflow and pressurization. To compound the problem, differential pressure sensors were used to control airflow devices and for maintaining room directional airflow. A very challenging method when doors are often left open.
For these reasons Phoenix Controls developed a unique approach to maintaining directional airflow. This simple concept is called the “Volumetric Offset” approach. The theory is that if you are able to accurately exhaust more air from a space then what is being brought in, additional air would infiltrate the space to make up the difference: Exhaust volume = Supply volume + Offset
. In fume hood laboratories where the door(s) are opening and closing often, the volumetric offset approach was, and still is the best solution.
Additionally, when working with fume hoods there is often a need for additional inputs and outputs for the various pieces of control equipment.For that reason our Celeris®
system offers the best solution as each valve controller comes with its own feature-rich controller to offer the most flexibility.Life Sciences
share the same requirement for proper directional airflow. In facilities where animal research takes place, or where Vivariums are used, proper pressurization is critical. In facilities where biological research is conducted (BSL), there are often multiple levels of pressurization from the corridor outside to the space within. These applications are not as demanding at the controller level, and for that reason our Traccel® system is the best choice. Traccel uses the same valves and volumetric offset approach, but does not share the same requirement at the controller level.
Likewise in a healthcare setting,
proper directional airflow is needed but the applications are not as intensive as a wet chemistry research laboratory. For that reason Phoenix Controls has developed the Theris® platform. Theris has been designed to fit the needs of the typical operating suite, isolation room or patient room while using the volumetric approach and Accel II venturi valves. Theris and Traccel use the valves in Tracking Pair applications to accomplish room level pressurization and temperature control. Lastly, in Healthcare facilities around the world, whether protecting the patient in an Isolation Room, or protecting the patient undergoing surgery, maintaining directional airflow and proper pressurization is one of the best weapons available in the fight against the spread of disease and infection. Through the years, Phoenix Controls has become the choice of engineers, architects and owners when selecting airflow control equipment to handle the pressurization of their critical spaces.