The primary performance characteristics for vertical and horizontal flamespread evaluated in the NFPA 285 test are assessed through visual observations and temperature sensors located throughout the specimen during the test. The duration of the fire exposure for the NFPA 285 test is 30 minutes. This is followed by an additional 10-minute observation period after the fire source is shut off. Subsequent deconstruction and noted observations of interior damage conclude the test event. During the course of this test, it was apparent that the wood detailing around the window opening was a weak point of the construction. However,the design withstood the exposure and subsequent observation period with success. In no way was the ExoAir 130 involved in flame spread activity inside the wall cavity.
Testing was performed on an opaque assembly and a penetration assembly in accordance withASTM E2357. The assembly withstood the static and cyclic wind loading conditions of the standard without damage. Air leakage for the assembly was measured at 0.002 cfm/ft² @ 1.57 psf (0.009 L/s•m2 @75 Pa). The industry benchmark for this test is listed by the Air Barrier Association of America, in concert with the requirements stated in the IECC and ASHRAE 90.1, not to exceed 0.04 cfm/ft2 @ 1.57 psf (0.20 L/s•m2 @75 Pa). Tremco’s ExoAir 130, as tested as part of an assembly of Tremco manufactured products, achieved an assembly air leakage rating approximately 20 times tighter than the industry recognized requirement.
After the ASTM E2357 testing was concluded, the penetration wall assembly, minus the benefit of the exterior brick and insulation, was then put to the test for water leakage (ASTM E331), where the exterior side of the wall assembly was exposed to a continuous water spray while stepping from a minimum infiltration pressure of 137 Pa for 15 minutes (which is the minimum standard) up to 300 Pa for 2 hours.Water was never observed leaking into the assembly wall cavity. The test was concluded after the 2 hour and 15 minute test, far exceeding the standard test requirements at 137 Pa (2.86 psf) for 15 minutes.
UL WEBSITE LISTING
Witnessed and approved by a UL representative, this tested wall assembly is located on the UL website’s Online Certifications Directory for NFPA 285, ASTM 2357 and ASTM E33 compliance.
For this and other UL listed wall assemblies incorporating comprehensive, compatible air and moisture barrier systems from Tremco, visit the UL Online Certifications Directory on the UL website. Place “Tremco” in the Company Name field and “FWFO” in the UL Category Code field, and click the “Search” button. If you don’t see the assembly you need, click here to inquire about an Engineering Judgment from Tremco.