The Greenheck HBT-321 is a heavy-duty, bubble-tight isolation damper designed for critical environments where leakage control is paramount.

There are many design aspects that are evaluated early in project development to help foresee potential problems that may arise during test & balance (TAB).

“The acquisition of California Economizer and its Zonex Systems brings together the two oldest manufacturers of zoning dampers and zone-control systems,” said Dick Foster, the president of Zonefirst and its parent company, Trolex Corp.

ANSI/AMCA Standard 540-23 establishes uniform methods of laboratory testing the ability of a louver to remain unbreached by flying debris during a windstorm.

Ruskin, part of Johnson Controls Inc., today has 29 production and office locations worldwide.

Here, the operations manager with Poynter Sheet Metal offers advice on installing IRIS dampers.

Superseding AMCA Publication 511-21, AMCA Publication 511-21 (Rev. 12-22) outlines technical procedures and the proper presentation of data for the certification of air-control devices through the AMCA Certified Ratings Program (CRP).

AMCA Publication 511-21 (Rev. 12-22) is available free of charge in PDF format.