Effective February 22, 2010 carbon monoxide alarms are required in all existing and new single-family homes along with most other buildings that have sleeping units/rooms. The carbon monoxide alarms are required in addition to smoke alarms as follows:
- Homes constructed prior to 1/1/08 and where no modification has taken place, carbon monoxide alarms are permitted to be battery operated. The alarm must be located on the lowest story having a sleeping area.
- Homes constructed after 1/1/08 or where modification has taken place the alarms must be hardwired and interconnected. An alarm is required on each story with a sleeping area; AND on each story where a carbon monoxide source is located (i.e. attached garage, gas fireplace, gas hot water, etc).