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Product Description

Holyoake Curtain-type fire dampers are designed to restore the fire resistance of a wall or floor, in which a hole has been formed to permit the passage of air, either ducted or not, to enable an air distribution system to function. The arrangement of interlocking blades mounted in a guide channel frame minimizes space requirements, and facilitates ease of installation in ductwork.

All Holyoake Series IBD units carry up to a 4 HOUR rating, as determined by the following testing Authorities.(Tested in New Zealand and Australia)


Refer to page 308 of the product manual for further information. A link to the manual can be found on the right hand side of this page when logged in.

Product Specification

Fire dampers shall be interlocking blade, curtain type, conforming to the requirements of the Australian and N.Z. Building Code, and shall be built to comply with construction details proven by prototype testsconducted in accordance with A.S.30, A.S.1682, or U.L.555, to withstand exposure to controlled flame for no less than 4 hours before failure of the assembly as a whole, or any of its components, and shall qualify for a 4 hour fire resistance rating, in terms of Australian Standard 1530, Part 4, fire resistance test of structures. Fire dampers shall be equipped for either vertical or horizontal mounting, and shall close by release of a fusible link at a temperature of 71ºC. Test latches and access doors shall be provided on all fire dampers so that they may be test operated at any time after installation without destroying fusible links. Fire dampers shall be installed in wall or floor openings utilizing steel mounted sleeves, angles, other materials and practices required to satisfy the Australian and N.Z. Building Code, and A.S.1682 Parts I & II, and as shown in the manufacturers instructions. Fire dampers shall be Holyoake Series IBD, with sleeves Holyoake Model IBD-MSU.

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