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Up-Blast Stack Cap
Up-Blast Stack Cap combination non-back draft damper is applied at the terminating point of a vertical exhaust stack. The Cap has two damper blades that open automatically when the fan is turned on. When the fan is at operating speed, rain and snow are pushed away from the open duct. The damper blades remain on at slight angle when they are open. At the moment the fan is turned off, the blades drop and close off the open duct. This stops rain, snow or outside air from entering the duct system. Most state and local municipalities "require" an Up-Blast Stack Cap as the terminating point of an exhaust duct that is directed to the atmosphere. It is also recommended to terminate the exhaust duct 6 feet above the roofline in a vertical fashion. This prevents the contaminant from being drawn into the heating or air conditioning units, open windows, make up air units and other open vents in the roof. For additional information, please refer to NFPA Code # 33-9 (section 5-11) and NFPA Code #91. The Code booklets can be obtained from the National Fire Protection Agency, Quincy MA, (617) 770-3000 or www.nfpa.org.

Side View
Collar sized to slip
OVER spiral pipe.

Bottom Veiw, Looking Up.

Common uses for Up-Blast Stack Caps are spray booths (as shown) or drying ovens. Air Handling Systems ductwork can be used throughout the system, including spiral pipe, elbows, offsets, and transitions.

*Allow 4 to 10 working days. Other sizes available upon request. 24" - 42" MUST ship via Common Carrier. Also available in Stainless Steel, see page 37.
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If your are interested in ordering any of our products, the process is simple. Just click on Shop Online and select the product(s) you want to buy. It's as easy as that!!!

Should you have any questions, we offer a Frequently Asked Questions section that answers the many questions submitted to us over the years.

If you are interested in obtaining a copy of our guide to designing a system, click on Airhand Designing a System and you can either have us mail it to you or you can download your own copy.

One of our special features is the ability to manufacture custom tees. To find out more information, click on Manufacturing (Custom Parts)

We welcome your questions and comments. If you want to contact us, your can either send us an email at sales@airhand.com or phone us at either: 800.367.3828 or 203.389.9595.
Our fax number is:
800.438.7135 or 203.389.8340

Our company has over 50 years of expertise with a deep commitment of customer service. We are the single source for all your dust & fume collection and industrial ventilation components. You can rely on Air Handling Systems for cost-effective, high quality components. Our technical sales staff is ready to help solve your problems.

CONTENTS

Access Doors30 Angle Rings19 Ball Joints34 Bellmouths34 Blastgates32 Couplings18 Design Information10-13 Duct Silencers33 Easy Connect System18 Elbows22 End Caps / End Plugs18 Extension Arms39 Flexhose40-47 Floorsweeps34 Hangers20-21 Installation Information14 Nozzles35 Offsets27 Radial Saw Hoods34 Reducers31 Spiral Pipe16-17 Stainless Pipe37 Tees27-29 Y Branches29 Transitions35 Up-Blast Stack Caps36
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Air Handling Systems Catalog Home Page
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Dust Collection | Ventilation Systems | Dust Control | HVAC Systems & HVAC Ducts | Ducting | Ductwork | Custom Manifold
Industrial Ventilation | HVAC System Ducting | Spray Booth Fume Control