Reference Source

CSA/AM Z21.10.3

For CSA/AM Z21.10.3, standard title is Water Heaters-Circulating Tank, Instantaneous and Large Automatic Storage Type Water Heaters; nrtl is UL; laboratory is UL LLC; status is currently recognized, recorded from its source on 2026-08-10.

Test standard
CSA/AM Z21.10.3 verified
Standard title
Water Heaters-Circulating Tank, Instantaneous and Large Automatic Storage Type Water Heaters verified
NRTL
UL verified
Laboratory
UL LLC verified
Status
currently recognized our reading
Sourceosha.gov
Verified
Review by
DatasetWhich OSHA-recognized labs (NRTLs) can certify to a given test standard

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

CSA/AM Z21.10.3 | Water Heaters-Circulating Tank, Instantaneous and Large Automatic Storage Type Water Heaters |

— osha.gov, retrieved 2026-08-10

Source

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