Assertion: smoke damper | /r/CapableOf | carry a leakage class rating
Facets:
value: according to underwriter's laboratory
type: OTHER
Source sentences:
text: According to Underwriter's Laboratory, "smoke dampers certified by UL carry a leakage class rating that indicates the level of air leakage measured through the damper under test conditions.
text: Smoke dampers certified by UL carry a leakage class rating that indicates the level of air leakage