Carbon monoxide alarms in sleeping areas

Description

Carbon monoxide alarms must be installed outside each separate sleeping area in the immediate vicinity of the bedrooms when the dwelling has fuel-fired appliances or an attached garage.

Why this exists

CO is colorless, odorless, and lethal. The combination of an attached garage (where engines run) plus sleeping areas makes detection mandatory. CO alarms are a separate device from smoke alarms — both are required.

Categories

Applies to

• When:
  • if dwelling has any fuel-fired appliance (gas range, gas water heater, gas furnace, fireplace)
  • if dwelling has an attached garage

Source

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

• Garage / dwelling fire separation · IRC R302.6
• Natural light in habitable rooms · IRC R303.1
• Habitable space minimum ceiling height · IRC R305.1
• Egress window net opening dimensions · IRC R310.2
• Stair riser, tread, and headroom · IRC R311.7