Brockville Fire Department

360 Laurier Blvd.
Brockville ON K6V 7J6

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Phone: 613-498-1261

Call: 9-1-1

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Smoke Alarms and Carbon Monoxide Alarms

Smoke alarms save lives. Three out of five fire deaths happen in homes with either no smoke alarms or no working smoke alarms. When there is a fire, smoke spreads fast – smoke alarms give you time to get out.


It’s the law.
The Ontario Fire Code requires that every home have working smoke alarms on every level. If you are a landlord it is your responsibility to comply with this law. If you are a tenant it is your responsibility to notify your landlord immediately if your alarm/s is/are not working.

Smoke alarms save lives.
Most fatal fires occur at night when people are asleep. Often, victims never wake up. A working smoke alarm will detect smoke and sound an alarm to alert you, giving you precious time to escape.

One smoke alarm is not enough.
Install smoke alarms on every level of your home and near sleeping areas. If you or your loved ones sleep with bedroom doors closed, install an alarm inside each bedroom.

Smoke alarms don’t last forever.
Smoke alarms do wear out, so if you think your alarms are more than 10 years old, replace them with new ones. Please note you cannot replace a hard-wired smoke alarm with a battery-powered smoke alarm.


There are many types of smoke alarms, each with different features. Alarms can be electrically connected, battery-powered or a combination of both. Smoke alarms commonly use one of two types of technology to detect the presence of smoke in the air: Photoelectric smoke alarms and Ionization smoke alarms.

Ionization smoke alarms are generally more responsive to flaming fires.
How they work: Ionization-type smoke alarms have a small amount of radioactive material between two electrically charged plates, which ionizes the air and causes current to flow between the plates. When smoke enters the chamber, it disrupts the flow of ions, thus reducing the flow of current and activating the alarm

Photoelectric smoke alarms are generally more responsive to fires that begin with a long period of smoldering (called “smoldering fires”).
How they work: Photoelectric-type alarms aim a light source into a sensing chamber at an angle away from the sensor. Smoke enters the chamber, reflecting light onto the light sensor; triggering the alarm.

For each type of smoke alarm, the advantage it provides may be critical to life safety in some fire situations. Home fatal fires, day or night, include a large number of smoldering fires and a large number of flaming fires. You can not predict the type of fire you may have in your home or when it will occur. Any smoke alarm technology, to be acceptable, must perform acceptably for both types of fires in order to provide early warning of fire at all times of the day or night and whether you are asleep or awake.

For best protection, it is recommended both (ionization and photoelectric) technologies be used in homes. In addition to individual ionization and photoelectric alarms, combination alarms that include both technologies in a single device are available.


Only working smoke alarms can save your life! Smoke alarms require simple maintenance to keep them in good working order. These tips will help to make sure your alarms perform as intended-when you need them the most:

  • Test your smoke alarm regularly.
    Once a month, test your smoke alarms by pushing the alarm test button. 
  • Change your clock, change your battery.
    Install a new battery of the proper type at least once a year.  If the low battery warning beeps, replace the battery immediately.  We change our clocks each spring and fall so this is a good time to change your batteries as well.
  • Gently vacuum alarm every six months.
    Dust can clog a smoke alarm, so carefully vacuum the inside of a battery powered unit using the soft bristle brush.  If electrically connected, vacuum the outside vents only.
  • Replace older smoke alarms.
    All smoke alarms wear out. If your alarms are more than 10 years old, replace them with new ones.  


Carbon Monoxide (CO) is a poisonous gas that you cannot see, smell or taste. It is often referred to as the “silent killer.” CO is produced by the incomplete burning of fuels such as natural gas, propane, heating oil, kerosene, coal, charcoal or wood.

A Carbon Monoxide (CO) alarm will alert you when dangerous levels of CO are inside your home. A working alarm will ring loudly giving you the and your family the early warning you need to get out. CO alarms can warn you about sudden failures of fuel-burning appliances and are a good first line of defense against CO exposure.


There are different types of alarms with different features, so choosing the right one can be confusing. Take comfort in knowing that while alarms might look different and/or have different features, they are all tested to the same standard. Make sure that the alarm you are purchasing is CSA-6.19 Residential Carbon Monoxide Alarming Devices or UL 2034 Single and Multiple Station Carbon Monoxide alarms. Features to consider:

  • Power Source
    CO alarms can be electrically powered, battery-powered, electrical plugin or a combination. If you are installing a plugin type or electrically wired alarm, a battery backup is recommended in case of power failures.
  • Digital Display
    A digital display shows the parts per million (PPM) of CO that is in your home. Alarms aren’t activated unless levels reach 70 PPM, however a digital readout gives you an opportunity to have fuel-fired equipment inspected and repaired prior to an emergency occurring.



Unlike smoke, CO mixes freely with the air, so your CO alarm doesn’t have to go on the ceiling or up high. It does need to be near the area where you sleep so that it is loud enough to wake you up and get you into action. If your home has a fuel-burning appliance or an attached garage, install a carbon monoxide alarm adjacent to each sleeping area. Read the manufacturer’s instructions carefully and follow them exactly.


If you live in an apartment or condo building and there is a fuel-burning appliance inside your unit, install a carbon monoxide alarm adjacent to your sleeping area. Read the manufacturer’s instructions carefully and follow them exactly.

If the building has a service room with a fuel-burning appliance, CO alarms must be installed in the service room and adjacent to each sleeping area of all condos/apartment/units above, below and beside the service room.

If the building has a garage, CO alarms must be installed adjacent to each sleeping area of all condos/apartment/units above, below and beside the service room.



Read the manufacturer’s instructions carefully and follow them exactly. Carbon monoxide alarms do not last forever. Check the expiry date on the alarm so that you know when to replace them. If you cannot find a date, replace the alarm.