UL 228 · ITS
For UL 228, nrtl is ITS; standard title is Door Closers-Holders, With or Without Integral Smoke Detectors; laboratory is Intertek Testing Services NA, Inc; osha docket is OSHA-2007-0039; status is currently recognized, recorded from its source on 2026-10-01; source re-checked 2026-11-10.
- Test standard
- UL 228 verified
- Standard title
- Door Closers-Holders, With or Without Integral Smoke Detectors verified
- NRTL
- ITS
- Laboratory
- Intertek Testing Services NA, Inc.
- OSHA docket
- OSHA-2007-0039 verified
- Status
- currently recognized our reading
Values marked our reading are our classification of what the source says — the source does not print them in those words. The quote below is the evidence for each one; judge it yourself.
What the source says
UL 228 | Door Closers-Holders, With or Without Integral Smoke Detectors |
— osha.gov, retrieved 2026-10-01
Where each value comes from
The value above is stated away from the sentence quoted with the answer, so the passage that states it is shown here too.
OSHA docket
Docket Number: OSHA-2007-0039
— all from osha.gov, retrieved 2026-10-01
Source
- osha.govhttps://www.osha.gov/nationally-recognized-testing-laboratory-program/its