Fire Prevention Week 2024

Smoke alarms can be categorized according to how the sensors work OR according to its power source.
When it comes to sensors, there are two main types of smoke alarms: ionization and photoelectric devices. An ionization smoke alarm is generally more sensitive to flaming fires, and a photoelectric smoke alarm is generally more sensitive to smoking and smoldering fire types. As long as the smoke alarm is in working order, both ionization and photoelectric alarms provide adequate protection. Due to the nature of how the sensors work, installing a photoelectric smoke alarm in or close to the kitchen may reduce nuisance alarms.

Smoke alarms can also differ according to its power source. Smoke alarms can be battery operated (9v, AA or 10-year lithium-ion batteries) or hard-wired with, or without, battery back-up. Hardwired smoke alarms can also be interconnected so that they all sound an alert if one detects smoke. The highest level of protection is offered by interconnected hard-wired smoke alarms with battery back-up.

MFES does not endorse any specific brand. However, we do recommend that Mississauga residents purchase smoke alarms from reputable retailers and pick devices that are listed by a qualified testing laboratory, which is usually disclosed on the product’s packaging.

Installing the correct number of smoke alarms in the correct locations is key when it comes to safety. The best type of smoke alarm is one that works!

The batteries in your smoke alarms should be replaced at least once a year or when the low battery indicator chirps. Some devices have built-in 10-year sealed batteries, which eliminates the need for battery replacements.

Cooking by-products, steam, and smoke can sometimes trigger your smoke alarm. This is called a nuisance alarm. Using an exhaust fan or opening a nearby window can often help. Smoke alarms should ideally be placed at least 6 metres away from the stove/oven.

Some smoke alarms are equipped with a hush button minimize disruption from nuisance alarms. Additionally photoelectric smoke alarms may be a better choice for the kitchen area.
Unattended cooked is the most common cause of fires in Mississauga. Smoke alarms should never be disabled or removed.

People who are hearing impaired have the option to use alarms with built-in strobe lights that have been tested by an independent testing laboratory. Devices such as a pillow or bed-shaker can also be installed for additional protection.

Most home improvement, hardware, consumer electronic and big-box stores carry a range of smoke alarms. MFES recommends that Mississauga residents purchase smoke alarms that have been tested by recognized testing laboratories. 

You can tell which alarm is beeping, smoke or carbon monoxide, by paying attention to the sound of the alarm.

Smoke alarms alerts you with 3 longer beeps – BEEP! BEEP! BEEP! – followed by a short pause and then 3 beeps again. 

Carbon monoxide alarms alert you with four shorter beeps  – BEEP! BEEP! BEEP! BEEP! – followed by a short pause and then 4 beeps again.

You can familiarize yourself with the sounds of your alarms by testing them monthly.