When it comes to protecting your home and the people in it, smoke alarms and carbon monoxide (CO) alarms are two of the most important safety devices you can have. While they may look similar and are often installed in the same areas, they serve two very different purposes. Smoke alarms warn you of fire and smoke, while carbon monoxide alarms alert you to a dangerous, invisible gas that can become deadly without warning.
Having the right alarms installed in the proper locations, along with regular testing and maintenance, provides an important layer of protection for your home and family.
Understanding the Difference Between Smoke and CO Alarms
Smoke alarms are built to detect smoke and particles generated by fire. When smoke rises and reaches the alarm’s sensor, it activates a loud, high-pitched warning to alert occupants to evacuate.
Carbon monoxide alarms detect carbon monoxide, a colorless, odorless, and tasteless gas that can be dangerous or deadly at high levels. Since CO cannot be detected by human senses, a carbon monoxide alarm is often the only way to know when unsafe levels are present.
Remember:
- Smoke alarms do not detect carbon monoxide.
- Carbon monoxide alarms are not designed to detect smoke or fire.
- Fires can produce carbon monoxide, but CO can also exist without visible smoke or flames.
- Combination smoke and carbon monoxide alarms are available and provide protection against both hazards in one device.
The Importance of Carbon Monoxide Alarm
Carbon monoxide is often called the “silent killer” because it cannot be seen, smelled, or tasted. Exposure to high levels can cause serious illness and may be fatal. Since carbon monoxide can move throughout a home, alarms should be installed near sleeping areas and close to fuel-burning appliances.
Common sources of carbon monoxide include:
- Leaking furnaces
- Gas stoves
- Wood-burning stoves
- Blocked or damaged chimneys
- Improperly vented fireplaces
- Unvented kerosene or gas space heaters
Maryland requires carbon monoxide alarms in homes where carbon monoxide-producing appliances or equipment are present.
Current requirements generally include:
- A carbon monoxide alarm outside each sleeping area in a central location; or
- For homes with a centralized alarm system, a CO alarm may be installed within 25 feet of each carbon monoxide-producing appliance or fixture.
For rental properties, carbon monoxide alarms must be installed:
- Outside and immediately adjacent to each separate sleeping area.
- On each level of the dwelling, including the basement.
Maryland also allows combination smoke and carbon monoxide alarms when they meet all applicable requirements. Because local counties may have additional requirements, homeowners and landlords should always verify current regulations in their area.
Why Smoke Alarms Are Essential
A properly working smoke alarm can provide the early warning needed to escape safely during a fire. Smoke alarms are available in several options, including hardwired, battery-operated, and interconnected systems that activate all alarms throughout the home when one detects smoke.
Maryland law requires automatic smoke alarms in residential buildings, including one- and two-family homes, apartment buildings, dormitories, and hotels.
Smoke alarms must:
- Be installed according to the National Fire Alarm and Signaling Code.
- Be listed and labeled by a nationally recognized testing laboratory and comply with Underwriters Laboratories (UL) 217 standards.
- Detect visible or invisible particles produced during combustion.
- Provide an alarm loud enough to warn occupants in sleeping areas.
Additional requirements may apply depending on the age of the home, construction type, rental status, and accommodations for individuals who are deaf or hard of hearing.
Keep Your Home Protected
Smoke alarms and carbon monoxide alarms work together to help protect your home from two serious hazards. Whether you have separate devices or combination alarms, proper installation, routine testing, and timely replacement are essential.
At Owings Mechanical, we understand the importance of keeping your home safe and up to code. Our team can help ensure your electrical and safety systems are installed correctly and operating as they should, giving you confidence and peace of mind. Contact us today!