Carbon Monoxide Detectors

Mass. General Law Chap.148 26F1/2 (Nicoles Law) requires owners of all residential properties to install and maintain carbon monoxide (CO) alarms.

The Board of Fire Prevention Regulations has developed the regulations (527 CMR) establishing the specific requirements of the law.
Carbon monoxide detectors are required in any residence that has fossil-fuel burning equipment including but not limited to a furnace, boiler, water heater, fireplace or any other apparatus, appliance or device; or has enclosed parking or an attached garage.
Residences with any fossil burning fuel equipment powered by the list below must comply:
  • LPG
  • Natural Gas
  • Oil
  • Coal
  • Wood
Carbon monoxide alarms must be installed on every level of the home, including habitable portions of basements and attics but not including crawl spaces.
On levels with sleeping areas, the carbon monoxide alarm shall be located outside of any bedroom, but shall not exceed 10 feet as measured in any direction from any bedroom door. The installation of CO alarms shall be located/installed in accordance with the manufacturer's instructions.
  • Battery operated with battery monitoring
  • Plug-ins with battery back up
  • Hard wire with battery back up
  • Low voltage system
  • Wireless
  • Combination smoke/carbon monoxide
  • Must have simulated voice and tone alarms that clearly distinguish between the two types of emergencies
  • Must be photoelectric within 20 feet of a bathroom (with shower or tub) or kitchen.
The Winchendon Fire Department will inspect for proper placement and working order of all CO alarms prior to a closing. Upon successful completion of the inspection, a certificate of compliance will then be issued by the inspector.
View additional information on Carbon Monoxide Detectors and carbon monoxide safety; please visit the U.S. Fire Administration website.