Skip to main content
U.S. flag

An official website of the United States government

Here’s how you know

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

HTTPS

Secure .gov websites use HTTPS
A lock (LockA locked padlock) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

    • Environmental Topics
    • Air
    • Bed Bugs
    • Cancer
    • Chemicals, Toxics, and Pesticide
    • Emergency Response
    • Environmental Information by Location
    • Health
    • Land, Waste, and Cleanup
    • Lead
    • Mold
    • Radon
    • Research
    • Science Topics
    • Water Topics
    • A-Z Topic Index
    • Laws & Regulations
    • By Business Sector
    • By Topic
    • Compliance
    • Enforcement
    • Laws and Executive Orders
    • Regulations
    • Report a Violation
    • Environmental Violations
    • Fraud, Waste or Abuse
    • About EPA
    • Our Mission and What We Do
    • Headquarters Offices
    • Regional Offices
    • Labs and Research Centers
    • Planning, Budget, and Results
    • Organization Chart
    • EPA History

Breadcrumb

  1. Home
  2. Indoor Air Quality (IAQ)

Where should I place a carbon monoxide detector?

Each floor of the home needs a separate detector. If you are getting a single carbon monoxide detector, place it near the sleeping areas and make certain the alarm is loud enough to wake you up. For more tips, see: the Underwriters Laboratories': Carbon Monoxide Safety. 

How do I install my CO alarm?

Follow the installation instructions found in the manufacturer's use and care booklet that accompanies the product. Proper installation is an important factor in receiving optimum performance. It's important to follow these instructions exactly.

Do CO alarms operate differently than smoke alarms?

Although they may look and sound similar, CO alarms and smoke alarms are designed and intended to detect two separate, distinct hazards. Therefore, to help protect your family from both hazards, it's important to install both UL Listed CO alarms and smoke detectors.

How do I take care of my CO alarm?

Like smoke detectors, CO alarms need to be tested regularly and cleaned as indicated in the manufacturer's use and care booklet. If the unit operates off a battery, test the detector weekly and replace the battery at least once a year.

Should I follow any safety tips for using and maintaining my CO alarms?

As with any product, read the manufacturer's use and care booklet for installation and maintenance guidelines. Keep these instructions on file for future reference.

If your unit operates off the battery, never allow anyone to "borrow" the battery. Like any appliance or power tool, a CO alarm can't work unless it has a functioning power source.

For more information, see:

  • CO Alarms - Consumer Product Safety Commission (CPSC)
  • Underwriters Laboratories': Carbon Monoxide Safety 
  • Carbon Monoxide Detectors - National Fire Protection Association (NFPA)
  • EPA's Carbon Monoxide's Impact on Indoor Air Quality

Related Questions

  • What is carbon monoxide?
  • What about carbon monoxide detectors?
  • What is the average level of carbon monoxide in homes?
  • What do I do if I suspect that combustion appliances are affecting my health?
  • What are combustion products?

Indoor Air Quality (IAQ)

  • Learn about Indoor Air Quality
    • Introduction to IAQ
    • Improving Indoor Air Quality
    • Climate Change and IAQ
  • IAQ by Building Type
    • Homes
    • Multi-Family Housing
    • Schools
    • Offices & Other Large Buildings
  • Indoor Air Pollutants and Sources
    • Carbon Monoxide
    • Indoor Particulate Matter
    • Secondhand Smoke/Aerosol
    • Volatile Organic Compounds
  • IAQ Science and Technologies
    • IAQ Science
    • IAQ Science Webinar Series
    • Air Cleaners
    • Air Sensor Technology and IAQ
  • Networking and Funding
    • CIAQ
    • Tribal Homes and IAQ
    • Cooperative Agreements
  • Webinars, Meetings and Resources
  • IAQ Trending Topics
  • IAQ Frequently Asked Questions
  • Publications about IAQ
  • Regional and State IAQ Information
Contact Us about Indoor Air Quality
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on June 6, 2024
  • Assistance
  • Spanish
  • Arabic
  • Chinese (simplified)
  • Chinese (traditional)
  • French
  • Haitian Creole
  • Korean
  • Portuguese
  • Russian
  • Tagalog
  • Vietnamese
United States Environmental Protection Agency

Discover.

  • Accessibility Statement
  • Budget & Performance
  • Contracting
  • EPA www Web Snapshot
  • Grants
  • No FEAR Act Data
  • Plain Writing
  • Privacy
  • Privacy and Security Notice

Connect.

  • Data
  • Inspector General
  • Jobs
  • Newsroom
  • Regulations.gov
  • Subscribe
  • USA.gov
  • White House

Ask.

  • Contact EPA
  • EPA Disclaimers
  • Hotlines
  • FOIA Requests
  • Frequent Questions
  • Site Feedback

Follow.