Nationwide Boiler's CataStak SCR System Achieves Less Than 1 PPM NOx - Nationwide Boiler Inc.
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About Nationwide Boiler

Fremont, CA, July 20, 2017

Nationwide Boiler Inc., the leading supplier of selective catalytic reduction (SCR) systems for package boilers, has confirmed source test results of 0.7 ppm NOx. In addition, ammonia slip was recorded at 0.39 ppm, illustrating the effectiveness of Nationwide Boiler’s system design related to mixing the ammonia and NOx prior to the catalyst.

The rental equipment tested includes one (1) 70,000 lb/hr trailer-mounted package watertube boiler installed with a Nationwide Boiler CataStak™ SCR system. The source test was performed while the unit was operating at normal seasonal loads, and included compliance testing for NOx, CO, and NH3, sampling in thirty minute test runs. Nationwide Boiler’s equipment is currently on rent at a major tomato processing facility in the Central Valley of California, where NOx emissions are limited to 7 ppm.

Nationwide Boiler’s CataStak™ SCR system was originally designed and tested in their boiler rental fleet in 1999. Since then, they have been renting and selling the CataStak™ for package watertube and firetube boilers, fired heaters, gas turbines, heat recovery steam generators, and other fired equipment applications. Nationwide Boiler has also developed the Ammonia-Free CataStak™, utilizing common diesel exhaust fluid, a safe liquid urea solution. The company has over 160 installations and continues to rent and sell the CataStak™ to customers across the country. Their newest innovative product, the DataStak™ Emissions and Efficiency Monitoring System, provides O2, NOx, CO and CO2 measurements, in addition to real time boiler efficiency, fuel usage and carbon footprint. It can be installed on any type of boiler, for permanent and temporary applications. For more information, visit

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Editorial Contact:
Chelsey Ryker, (510) 490-7100,

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