UL has announced damper manufacturers will be required to provide fire, smoke and combination fire/smoke dampers that are tested to new requirements.

Underwriters Laboratories has announced, effective July 1, damper manufacturers will be required to provide fire, smoke and combination fire/smoke dampers that are tested to new requirements, according to the Sheet Metal and Air Conditioning Contractors' National Association (SMACNA). SMACNA members were provided a description and summary of the new test standards in a special membership mailing sent in May. The technical paper outlining the new test standards is available online at www.smacna.org under "technical services."