Range Ventilation

Range ventilation has been a subject in ranges since their inception. The problem with most ventilation solutions is that their designs are flawed. There are many credible engineers that have ventured into this market, only to fail. In 1975 the National Institute for Occupational Safety & Health (NIOSH) participated in a study and design test of the firearms range at the Federal Reserve Bank in Kansas City, MO. The findings became the basis of the NIOSH 76-130 design criteria for indoor range ventilation systems.

The information with 76-130 identified airflow volume, velocity and area. The 76-130 made reference to an air delivery method that would create a laminar or like airflow through the respiratory zones of the shooters on the range. The 76-130 also made suggestions as how to achieve this.

As informative as the NIOSH 76-130 was, most engineered designs that followed were severely lacking in application. The most common failure was in air delivery and control, as it related to delta pressure.

The solutions performed by Patriot (Rangetech) were revolutionary, as it transformed the industry. Our most notable was the development of the Radial Diffuser Air distribution device. First installed at the NEWTC in Oak Creek, WI, our radial diffuser produced air flow results that had never been seen before. From a analytical test TWA the test samples found contaminant levels at less than the level of detection. From a users standpoint, one could fire as many rounds , as fast as possible, and never smell the weapon discharge. This device had greater application in sense that eliminated perforated air-wall, direction based, and experimental air delivery register systems entirely.

Today we have successfully designed, modified and installed hundreds of range HVAC systems of all types. We are the most capable group in this arena today. We are the first to implement a LEED Silver certified range recirculating ventilation system.

Patriot's participation in range developmental programs with the U.S Navy in the 1990's produced the last Navy range ventilation design criteria known as the Unified Force Criteria (UFC 4-160-01). This was later shared with the United States Air Force and the General Services Administration. They are identified as Engineering Technical Letter (ETL 06-11) and the GSA (all regions) HVAC Design excellence criteria, respectively.

The 2002 UFC 4-160-01 Naval Facilities (NAVFAC) publication was the last design criteria by NAVFAC in this matter. It was concluded that the design specification produced by Patriot was completely satisfactory to the Department of Defense.


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