Heavy-DutyTornado Dampers prevent ductwork collapse.
Press Release Summary:
Designed to protect against tornados and rapid pressure changes, Models HTOD-330 and -331 are double flanged channel frame style backdraft dampers that close, respectively, in same and opposite direction as normal flow. Products install in ductwork or mount to wall near building exterior and allow for air movement during normal weather conditions. Negative pressure caused by tornado causes damper to close, and spring-loaded blades return damper to open position after tornado passes.
Original Press Release:
Greenheck Introduces Tornado Dampers
Heavy duty Greenheck tornado dampers are double flanged channel frame style backdraft dampers designed to protect against tornados and rapid pressure changes. Installed in ductwork, or wall mounted, near the exterior of a building, Greenheck tornado dampers allow for air movement (intake or exhaust) during normal weather conditions. If a tornado passes near the building, the negative pressure caused by the tornado will cause the damper to close and prevent the collapse of the ductwork. Once the tornado has passed and the pressure equalizes, the spring-loaded blades will return the damper to its open position and revert back to normal ventilation. Model HTOD-330 will close in the same direction as normal flow and Model HTOD-331 will close in the opposite direction as normal flow.
Greenheck, the worldwide leader in manufacturing and distributing air movement 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.
