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The Active National Directory Of Source Emissions Testing
U.S. EPA Clean Air Excellence Award Recipient
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Visitor Support

Stack Tester FAQs is devoted to presenting an interactive reference site for a variety of air pollution testing and control issues. Our objective is to provide free access to source testing information to the public, and technical services and product sources to the vanguards of the industrial air pollution testing/control industry: stack testing consultants, facility owners and industrial plant operators.

Questions Most Often Asked About By Stack Testing Firms


Can I use this site for free?

YES. is a free reference site for buyers and decision makers of the industrial air pollution testing and control industry. There are no registration requirements nor membership fees for visitors to access the free resources on this website. Our objective is to provide a user-friendly site for visitors to easily research and find EPA test methods, stack testing firms, regulatory agencies and related services and products. We provide hundreds of web pages to a worldwide audience 24 hours a day, 7 days a week, 365 days a year.

To use a specialty service (e.g. Classified Ads, Select RFP, Site Sponsorship) or to be listed on the Directories or other specialty sections, companies have purchased a FEE BASED listing or service.
To place a listing
Click Here


How do I access the RFPs in the Secure Area?

If your company's PRIMARY business is stack testing you can get a Username/Password to access the Secure Area by purchasing a Directory Profile Click Here

For more information about the Log-In System   Click Here


How many RFPs does receive? cannot disclose information regarding the number of RFPs received, geographic location or other details. The frequency of new RFPs is not guaranteed so please do not base your decision to purchase a Directory Profile solely on this feature.


What type of visitors use

U.S. and international visitors, major industrial manufacturers, power plants, facility owners, industrial managers, environmental engineers, colleges/universities, stack testers and regulatory agency personnel have used
For details
Click Here

For a graphical view of our site traffic
Click Here


How do I list my firm on

It's very easy to add your listing to Click Here

Then select the Directory to add your listing to and the listing option you would like to place. The online order form will guide you through the process and you can submit payment with a major credit card online in minutes. If you prefer to pay by U.S. check or money order, use the printer friendly order form to mail your order to

To compare options & features Click Here
For help placing an order
Click Here


Can I convey my firm serves areas outside of the state or region I'm listed on?

Geographic Testing Area Icons

YES. You can designate your listing with the "National & International Bids" icon by placing a Directory Profile. visitors will immediately recognize your company serves areas not only within your listed geographic location but also throughout the entire United States or even to foreign countries. Your own custom web page or "Directory Profile" linked directly from your listings, provides visitors even more details on your company's services, expertise and detailed contact information.

For more information about Directory Profiles Click Here
For The Directory Legend
Click Here
For Directory FAQs
Click Here


How do I list our stack testing firm if we also rent & sell equipment?

Since your PRIMARY business is stack testing, order a Directory Profile then place a separate order for a Premium Listing in the Services & Products Directory. You will then be listed on both Directories and can enjoy the numerous benefits of having an Directory Profile at the same time.

For listing options & prices Click Here


Where can I find used stack testing equipment for sale?

Visit the Classified Ads. You'll also find job openings for stack testers, V.E. Readers Wanted / For Hire and more Click Here


How do I place a Classified Ad?

Classified Ads cost only $30/ad for a 60 day run. You can modify or delete your ad at anytime.
To post a Classified Ad on
Click Here

Or receive a Username/Password to post free Classified Ads when you purchase an Directory Profile or Company Profile. If you have already purchased a Basic or Premium Listing you will need to Upgrade To A Profile to receive a Username/Password to post free Classified Ads.

  • To Order A Directory Profile For Stack Testing Firms Click Here
    Includes Access To The Secure Area

  • To Order A Company Profile For Related Services & Products Click Here
    Does Not Include Access To The Secure Area

  • To Upgrade From A Basic Or Premium Listing To A Profile Click Here


How do I find an air sample analytical lab?

Visit the Services & Products Directory for a listing of Air Sample Analytical Labs Click Here
You'll also find stack testing equipment, EPA protocol calibration gases, dry ice, and more.


Can I buy the illustrated test methods?

You can buy a license to use the Image Files as packaged sets and download them online in minutes. Or download each separately in the Secure Area at no cost if you have purchased a Directory Profile. Trying out a free sample is the best way to see the quality we build into every one of our illustrations. For a free demo Click Here

Why a license? To protect the copyrights of the Image Files, there are limitations for using them in certain media applications (e.g. Do not add the Image Files to your website or any other Internet application. retains this right exclusively). For more information please read the Image Files License Agreement Click Here

For more information Click Here


Is there a buletin board for stack testers?

YES. SET Wire! The Internet's first online messaging system for stationary source emissions testing or "stack testing" industry. You can post questions, comments, opinions or respond to posts to help others. Use this free service as an excellent networking opportunity that can even generate leads for your business.

To use the SET Wire! Bulletin Board Click Here


Are subscriptions to the newsletter free?

YES. Subscriptions to "SET News!" are free or you can access each issue online by browsing through the archives. Stay on top of the latest stack testing services, new products, featured firms, events and tips with's unique newsletter.

To subscribe Click Here
To browse the Archives Click Here
For this month's edition of "SET News!" Click Here


Can I submit a Guest Article or Press Release?

YES. You can be the next Guest Author and submit an article to be published in "SET News!". Or announce your company's services, employees, new equipment and products as a Press Release. Best of all - it's free. An excellent networking opportunity that can even generate leads for your business.

See all the free services on Click Here


How do I apply for a National Website Award?

Click Here !

Send us your website address and a brief description of how your site serves the source emissions testing industry. If your site receives a National Gold, Silver or Bronze Award, you will be notified by e-mail with instructions for placing the linked award on your website. To apply for a National Website Award right now Click Here


Can I use the photos on the Photo Gallery?

Until we streamline the Photo Gallery permission request procedure we must deny use of the photos to protect their copyrights. We look forward to having this procedure finalized and presented online in the Photo Gallery at a later date.

To see the Stack Tester Photo Gallery Click Here


Can design my website? can create a custom web page "Directory Profile" for you to be included in the Stack Testing Firm Directory but we do not offer website design or hosting services.


Can I offer suggestions or ideas to

YES. welcomes all ideas and comments for improving the quality of our website. And many suggestions from visitors are often incorporated into new departments. If you have an idea or comment for improving
Click Here


What are the FEE BASED services?

The FEE BASED services include Listings, Profiles, Classified Ads, Select RFP, Illustrated Test Methods or any other service you have paid a fee to use on
Click Here


Are there FREE services on

YES. There are many FREE services available to visitors. Get listed on the Air PErmit PEople page, apply for a National Website Award, submit a New Products / Press Release or Guest Article to "SET News!" or post a question on the SET Wire! bulletin board system. To see all the free services available on Click Here


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About The Support Center
As we provide services to customers in both the United States and abroad, we cannot offer telephone support and
still be able to provide our numerous services at such low prices, and in many instances free. We have
found though that we can help a lot more people in far less time through the online
Support Center than we ever could over the telephone.


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