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Current page: Virginia USBC 2021 Amendment 30 (IRC R315)
CodeMandatory

Carbon monoxide alarms required: every dwelling with attached garage or fuel-fired appliances

Virginia USBC 2021 Amendment 30 (IRC R315)

Description

Carbon monoxide alarms shall be hard wired, plug-in or battery type; listed as complying with UL 2034. They shall be installed in every dwelling unit with an attached garage or fuel-fired appliances. When more than one CO alarm is installed, they shall be interconnected so activation of one causes all to alarm.

Why this exists

Standard residential CO alarm requirement; Virginia adds explicit interconnect provision for multi-alarm installations.

Categories

Life safety

Applies to

  • Jurisdiction: Virginia

Source

Virginia DHCDauthoritative
2021 Virginia Construction Code (Part I of USBC) (2021)
Section: Amendment 30 (IRC R315)
Published 2024-01-18 · last verified 2026-05-10

Solver enforcement

Browsable only — the solver does not currently enforce this directive (no spec-level data to check against). This entry exists so the architect personas can cite it in conversation and the user can read what the rule says.

Related directives

Last reviewed 2026-05-10.