An outer vapor barrier has now been made stronger with tridirectional fiberglass strands encapsulated between its layers of polyester, the manufacturer says. This improvement almost eliminates the possibility of tearing due to snags or punctures encountered during normal installation, says the company. This vapor barrier can be found on the manufacturer’s 070 and 076 insulated flexible ducts, which will be still listed and labeled as UL, Class 1 air ducts, per the UL 181 standard, the company says. This reinforcement is also currently used in the metal vapor barrier on the company’s 030 and 036 products.
ATCO Rubber Products, Inc., 7101 Atco Dr., Fort Worth, TX 76118; 800-877-3828; 800-366-3539 (fax); www.atcoflex.com (website).