SMOKE DETECTORS AND CARBON MONOXIDE DETECTORS

The basics...

Installing smoke alarms in every bedroom, outside each separate sleeping area, and on every level of a home — including the basement — is a fire safety precaution that all homeowners and landlords in your community need to take to protect residents from fire.

The mounting and location requirements for CO detection are covered in Chapter 17 of NFPA 72. CO detection is required:

1.     On the ceiling in the same room as permanently installed fuel burning appliance
2.     Centrally located on every habitable level and in each HVAC zone of the building
3.     Outside each separate dwelling unit and sleeping are within 21 feet of the door to sleeping room

A more in-depth look...

SMOKE DETECTORS

There are many brands of smoke alarms on the market, but they fall under 2 basic types: ionization and photoelectric.

Ionization and photoelectric smoke alarms detect different types of fires. Since no one can predict what type of fire might start in their home, the U.S. Fire Administration recommends that every home and place where people sleep have:

• Both ionization AND photoelectric smoke alarms, OR
• Dual-sensor smoke alarms, which contain both ionization and photoelectric smoke sensors.

Choose interconnected smoke alarms so that when one sounds, they all sound.

There are also alarms for people with hearing loss. These alarms may have strobe lights that flash and/or vibrate to alert those who are unable to hear standard smoke alarms when they sound.

• Put smoke alarms inside and outside each bedroom and sleeping area. A closed door may slow the spread of smoke, heat and fire.
• Put alarms on every level of the home. Smoke alarms should be interconnected. When one sounds, they all sound.
• Put smoke alarms on the ceiling or high on the wall. Check the manufacturer's instructions for the best place for your alarm.
• Only qualified electricians should install hardwired smoke alarms.

Some fire departments will install battery-operated smoke alarms in your home at no cost. Contact your local fire department's nonemergency phone number for more information.

Smoke alarms are powered by battery or by your home's electrical system. If the smoke alarm is powered by battery, it runs on either a disposable 9-volt battery or a nonreplaceable 10-year lithium-ion (“long-life”) battery. Alarms that get power from your home's electrical system, or “hardwired” alarms, usually have a backup battery that will need to be replaced once a year.

Is your smoke alarm still working? A smoke alarm with a dead or missing battery is the same as having no smoke alarm at all. A smoke alarm only works when it is properly installed and regularly tested. Take care of your smoke alarms according to the manufacturer's instructions. Below are some general maintenance tips.

Smoke alarm powered by a 9-volt battery

• Test the alarm monthly.
• Replace the batteries at least once every year.
• Replace the entire smoke alarm every 10 years.

Smoke alarm powered by a 10-year lithium-ion (or “long-life”) battery

• Test the alarm monthly.
• Replace the entire smoke alarm according to the manufacturer's instructions.

Smoke alarm that is hardwired into your home's electrical system

• Test the alarm monthly.
• Replace the backup battery at least once every year.
• Replace the entire smoke alarm every 10 years.

Never take the battery out of your smoke alarm while cooking! If a smoke alarm sounds while you're cooking or taking a shower with lots of steam, do not remove the battery. You should:

• Open a window or door and press the “hush” button.
• Wave a towel at the alarm to clear the air.
• Move the entire alarm several feet away from the kitchen or bathroom.

Disabling a smoke alarm or removing the battery can be a deadly mistake.

CO DETECTORS

Although the popularity of carbon monoxide (CO) alarms has been growing in recent years, it cannot be assumed that everyone is familiar with the hazards of carbon monoxide poisoning in the home.

Often called the invisible killer, carbon monoxide is an odorless, colorless gas created when fuels (such as gasoline, wood, coal, natural gas, propane, oil, and methane) burn incompletely. In the home, heating and cooking equipment that burn fuel are potential sources of carbon monoxide. Vehicles or generators running in an attached garage can also produce dangerous levels of carbon monoxide.

• The dangers of CO exposure depend on a number of variables, including the victim's health and activity level. Infants, pregnant women, and people with physical conditions that limit their body's ability to use oxygen (i.e. emphysema, asthma, heart disease) can be more severely affected by lower concentrations of CO than healthy adults would be.
• A person can be poisoned by a small amount of CO over a longer period of time or by a large amount of CO over a shorter amount of time.
• In 2016, local fire departments responded to an estimated 79,600 carbon monoxide incidents, or an average of nine such calls per hour. This does not include the 91,400 carbon monoxide alarm malfunctions and the 68,000 unintentional carbon monoxide alarms.
• Data from the Center of Disease Control and Prevention’s (CDC’s) National Center for Health Statistics shows that in 2017, 399 people died of unintentional non-fire carbon monoxide poisoning. 

Source: NFPA's Applied Research Division

Safety tips

• CO alarms should be installed in a central location outside each sleeping area and on every level of the home and in other locations where required by applicable laws, codes or standards. For the best protection, interconnect all CO alarms throughout the home. When one sounds, they all sound.
• Follow the manufacturer’s instructions for placement and mounting height.
• Choose a CO alarm that has the label of a recognized testing laboratory.
• Call your local fire department’s non-emergency number to find out what number to call if the CO alarm sounds.
• Test CO alarms at least once a month; replace them according to the manufacturer’s instructions.
• If the audible trouble signal sounds, check for low batteries. If the battery is low, replace it. If it still sounds, call the fire department.
• If the CO alarm sounds, immediately move to a fresh air location outdoors or by an open window or door. Make sure everyone inside the home is accounted for. Call for help from a fresh air location and stay there until emergency personnel.
• If you need to warm a vehicle, remove it from the garage immediately after starting it. Do not run a vehicle or other fueled engine or motor indoors, even if garage doors are open. Make sure the exhaust pipe of a running vehicle is not covered with snow.
• During and after a snowstorm, make sure vents for the dryer, furnace, stove, and fireplace are clear of snow build-up.
• A generator should be used in a well-ventilated location outdoors away from windows, doors and vent openings.
• Gas or charcoal grills can produce CO — only use outside.

Symptoms of CO poisoning

CO enters the body through breathing. CO poisoning can be confused with flu symptoms, food poisoning and other illnesses. Some symptoms include shortness of breath, nausea, dizziness, light headedness or headaches. High levels of CO can be fatal, causing death within minutes.

The concentration of CO, measured in parts per million (ppm) is a determining factor in the symptoms for an average, healthy adult.

• 50 ppm: No adverse effects with 8 hours of exposure.
• 200 ppm: Mild headache after 2-3 hours of exposure.
• 400 ppm: Headache and nausea after 1-2 hours of exposure.
• 800 ppm: Headache, nausea, and dizziness after 45 minutes; collapse and unconsciousness after 1 hour of exposure.
• 1,000 ppm: Loss of consciousness after 1 hour of exposure.
• 1,600 ppm: Headache, nausea, and dizziness after 20 minutes of exposure.
• 3,200 ppm: Headache, nausea, and dizziness after 5-10 minutes; collapse and unconsciousness after 30 minutes of exposure.
• 6,400 ppm: Headache and dizziness after 1-2 minutes; unconsciousness and danger of death after 10-15 minutes of exposure.
• 12,800 ppm: Immediate physiological effects, unconsciousness and danger of death after 1-3 minutes of exposure.