Greenheck Introduces Rectangular Bubble-Tight Damper

August, 2017

Greenheck Model HBT-221 is the industry’s first commercial grade rectangular bubble-tight damper with square blades. True rectangular blade design allows for lower pressure drop than bubble-tight dampers with circular or oval blade designs. Model HBT-221 features a blade seal mechanically fastened to the blade that is field replaceable and a flanged damper frame for easy mounting, and is available with a full range of electric, pneumatic or manual actuator options.  Each damper unit is factory-tested to ensure bubble-tight leakage performance per AMCA 500-D up to 10 in. wg (2.5 kPa) prior to shipping. Designed for isolation or decontamination applications, the HBT-221 damper is ideal for medical facilities, universities, test laboratories, and food processing.

Greenheck, the worldwide leader in manufacturing and distributing of air movement, conditioning and control equipment, offers the most UL certified dampers and the largest selection of AMCA licensed dampers in the industry.

For more information about Greenheck products, visit www.greenheck.com or contact Greenheck, P.O. Box 410, Schofield, WI 54476-0410, (715) 359-6171, FAX (715) 355-2399.



To obtain more information about this Greenheck announcement you may:

  1. Request information via e-mail
  2. Contact your local Greenheck Representative
  3. Phone us at (715) 359-6171 or fax us at (715) 355-2399
  4. Write us at Greenheck, P.O. Box 410, Schofield, WI 54476-0410
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