Home Alarm Systems

Most fires that kill people at home start at night, while the family is asleep. Smoke is quiet. It does not wake you up; it makes you sleepier. A smoke alarm on the ceiling is the thing that wakes you up in time to get out. In most Indian homes there still isn’t one. A battery smoke alarm is easy to fix on the ceiling yourself, and this page explains what it does, where to put it and how to look after it.

What a home fire alarm does

• It detects. A smoke alarm keeps sampling the air for smoke, day and night, whether you are at home or not. Heat alarms react to a rise in temperature and suit kitchens, where cooking smoke would set off a smoke alarm too often.
• It warns. A loud beep, and on some models a flashing light, tells everyone to get out. Flashing-light alarms help family members who are hard of hearing.
• It may switch other things on or off. In larger buildings with a full fire alarm system, the panel can shut off the AC, close fire doors and start other fire systems. A simple home alarm does none of this.
• It does not call the fire brigade by itself. A standalone home alarm only makes a noise. Only a properly set-up monitored system can send a signal to someone outside. Either way, when the alarm goes off, get out and call 101 or 112 yourself.

Where to put them

US fire safety guidance gives a simple rule that works for Indian flats and houses too:

• One inside every bedroom.
• One in the passage or hall outside the bedrooms.
• At least one on every floor of the house, including any basement.

Fix alarms on the ceiling, away from the kitchen stove, bathroom steam and the direct blast of an AC or fan. If you can, choose alarms that are linked to each other, so that when one goes off, all of them sound. A fire in the drawing room at 2 am will then wake the people sleeping behind closed bedroom doors.

Looking after your alarms

• Test every alarm once a month by pressing its test button.
• Never take the battery out because the alarm went off while you were frying. Use the hush button, open a window, and if it keeps happening, move the alarm a little further from the kitchen.
• Do not paint over it, tape it or cover it with decorations during Diwali, weddings or festivals.
• Replace the whole alarm when it reaches the end of its life. Many makers say 10 years from the date of manufacture, which is printed on the back. Follow what your alarm’s maker says.
• Never ignore a chirp. A regular short chirp usually means the battery is low or the unit has a fault.

A smoke alarm is not a carbon monoxide alarm. If you use a gas geyser in the bathroom, a coal angithi or a generator near the house, you also need a carbon monoxide alarm, which is a separate device.

What the numbers say

India does not publish data on smoke alarms in homes. The best data comes from the US, where the NFPA studied home fires reported to fire departments from 2018 to 2022:

• Smoke alarms were present in 74% of reported home fires.
• 59% of home fire deaths happened where there was no smoke alarm (43%) or the alarm did not work (16%).
• The death rate was about 60% lower in homes with working smoke alarms.
• Hardwired alarms worked in 94% of fires big enough to set them off, against 85% for battery-only alarms. Missing, disconnected or dead batteries were a leading reason alarms failed.

These are American figures, not Indian ones. They still make the point clearly: an alarm that is missing, or has no battery, protects nobody.

When the alarm goes off

The US Fire Administration warns that once a smoke alarm sounds, you may have less than two minutes to get everyone out. So treat every alarm as real. Shout to wake everyone, get out by your nearest safe route, stay low if there is smoke, close doors behind you and go to your meeting point outside. Call 101 or 112 from there. Do not go back in for phones, jewellery or documents.

Tonight, press the test button on your alarm. If you do not have one, buy one this week and fix it outside the bedrooms.