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unvented room heater standard

ANSI Z21.11.2: What a Vent-Free Certification Covers

September 25, 2026September 23, 2026 by Roksana

Vent-free gas fireplace with ANSI Z21.11.2 certification label and safety guide

ANSI Z21.11.2 is the unvented room heater standard. What a listing on the label actually certifies, what it does not, and how to check your own unit.

Categories Buying Guides Tags ansi z21.11.2 vent free certification, International Fuel Gas Code, listed and labeled, nationally recognized testing laboratory, unvented room heater standard 1 Comment

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