UL 181A

STANDARD FOR SAFETY FOR CLOSURE SYSTEMS FOR USE WITH RIGID AIR DUCTS AND AIR CONNECTORS

Scope

These requirements cover closure syste ms for use with factory-made rigid air ducts or air connectors complying with the Standard for Factory-Made Air Ducts and Air Connectors, UL 181. Closure systems consist of pressur e sensitive tapes and heat-activated tapes.

Closure sy stems are intended for use with rigid air ducts and air connectors installed in accordance with th e Standard for the Installation of Air Conditioning and Ventilating Systems, NFPA 90A, and the Standard for th e Installation of Warm Air Heating and Air Conditioning Systems, NFPA 90B; and/or Model codes.

A product that contains features, characteristics, components, materials, or systems new or different from those in use when the Standard was developed, and that involves a risk of fire, electric shock, or injury to persons, shall be evaluated using the appropriate additional component and end-product requirements as determined necessary to mai ntain the level of safety for the user of the product as originally anticipated by the intent of this Standard.