PHONE: 708.597.7090



Scientific Dust Collectors® ASHRAE Standard199 Test Lab               

-Test Lab Audited & Certified by Blue Heaven Technologies

Scientific Dust Collectors has an Ashrae Standard 199 Test Lab on site.  What is ASHRAE 199 you may ask?  ASHRAE 199 details a comprehensive, thorough and detailed method for testing the performance of industrial dust collectors being cleaned using pulse jet technologies. This is the first time a definitive test method has been identified for the dust collection industry. On June 1, 2016 the Standard 199-2016 was published as a joint venture between ASHRAE and the American Standards Testing Institute (ANSI). ANSI/ASHRAE Standard 199-2016 specifies test methods to measure emissions, differential pressure, and compressed air consumption in pulse cleaned dust collectors under realistic operating conditions. It applies to bag, cartridge, or envelope style industrial dust collectors that clean the filter media by using a pulse of compressed air to discharge the dust cake from the filter media while the air cleaning device remains online.

The test procedure is not concerned with the internal operation of the dust collector itself, but rather the actual performance of each testing process.  For too long, the use of the MERV rating has been associated with dust collector performance.  This can’t be farther from the truth as the MERV rating is specific to filter media performance under controlled laboratory conditions that mimic industrial HVAC systems.  While the MERV rating is useful for HVAC systems, it does not take into consideration the performance of repetitive cleaned filter elements.


SDC is proud to announce that we have recently completed all of the six (6) required testing stages as per the standard. It is important to note that the testing was done using SDC's standard design and nozzle cleaning technology. An air-to-cloth ratio of 10.6:1 was used on the required fine powder. The superb collection efficiency at all PM levels, low system pressure drop, and upset condition recovery are all well proven in this report.  What the results show is that our PATENTED Nozzle Cleaning Technology does allow us to operate at much higher Air to Cloth Ratios than the rest of the competition without decreasing efficiency or filter life. Furthermore, we are achieving these results with standard polyester filter media. This is why we offer a FILTER LIFE GUARANTEE on most applications (call for details). 

What does this mean for you? It means that using SDC's baghouse design can provide you an excellent dust collector product that saves you horsepower, compressed air, floor space and filter life all the while providing superior filtration efficiency! Please contact Scientific Dust Collectors and "Discover the Difference".

The following is a Summary of those results.  Please contact us with any questions, or for a copy of the FULL report. 


A summary of that report can be seen by clicking on the table below.



The pulse jet dust collection industry has been around for over sixty years. The common practice in sizing and specifying pulse jet baghouses from either engineers or end users, has been based on air-to-cloth ratios. Typical air-to-cloth ratios for fine powders for the generic baghouses is 5 to 1. That means that for every square foot of media, 5 CFM of air is processed. The pulse jet cleaning system consisted of a pulse pipe with a drilled hole (orifice) placed three to five inches above a venturi at the top of the bag/cage arrangement. The generic baghouses focused on fitting as much filter media into as small of a footprint as possible. With spacing between the bags as little as one inch, this also increased the interstitial velocity between the filters. This also meant that the generic baghouse design standardized on a hopper inlet with an upward flow pattern. The upward flow pattern caused re-entrainment of the dust particles that would be placed back upon the filters after being pulsed off.

Forty years ago, Scientific Dust Collectors decided to offer the marketplace something different. SDC felt that it was not so important how much media you had in a collector, but rather how well you cleaned it and how much of the media was reusable. Using a high side baffled inlet with drop out area, instead of the hopper entry, and slowing the air down as it enters the baghouse had some real advantages. Not only did this design eliminate dust re-entrainment but it created a downward air pattern inside reducing filter loading by allowing the larger particles to drop out due to gravity. In addition, spacing the bags between was increased to 2.5 and 3.0 inches to reduce the interstitial velocity between the filters. There was still the problem of using the flow restricting venturi arrangement. SDC then designed, and patented, a way of using a supersonic cleaning nozzle that allowed the complete elimination of the venturi. This advanced breakthrough allowed SDC to provide its customers the best cleaning system in the world. Using SDC's nozzle technology, our design was able to provide 3.2 times the amount of induced cleaning air into the bag compared to the generic cleaning system. Then eliminating the venturi allowed SDC to clean the entire bag and eliminate the 18-inch dead area in a filter bag when a venturi is used. These facts are well documented in several technical papers available from SDC. In short, these special features allowed SDC to operate with fewer filters at a higher air-to-cloth ratio than all of our competitors.

Despite these improved design features, the higher air-to-cloth ratio design is different than what the pulse jet dust collection industry was familiar with in a variety of applications. Therefore, in an effort to again illustrate the superiority of our design, SDC completed this ASHRAE Standard 199 Testing. The results of this detailed testing have been thoroughly documented, and are available upon request (36 pages).  For more information, please contact us at 708 597 7090, or on our Contact Us Page.


ASHRAE Standard 199 Test Lab Audited & Certified by Blue Heaven Technologies 10/2020.


Scientific Dust Collectors

4101 West 126th Street
Alsip, IL 60803-1901

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Phone: 708.597.7090
Fax: 708.597.0313

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