Room Heater Safety: ISI Mark and What to Check at Home

Room heater safety is easy to forget until the first cold week, when the heater comes out of storage. A heater is a simple device, yet it draws a lot of power, and small faults can turn into fires. This guide covers what to check before you buy, how to set it up at home, and the habits that keep it safe. It draws on a column by consumer writer Pushpa Girimaji in The Tribune.

Check the ISI mark before you buy

The Tribune column explains that convector, fan, panel, radiant and tubular heaters, as well as liquid filled radiators, must conform to the safety standard IS 302-2-30 and carry the ISI mark. This comes under a quality control order under the BIS Act. However, the writer notes that uncertified heaters are still sold, so do not assume every product on a shelf complies.

So look for the mark on the product and the box. If it is missing, choose another model. We have a related guide on how to check the ISI mark on a pressure cooker, and the same habit applies here.

Get the socket and wiring right

A heater draws far more current than a phone charger or a fan, so the plug and socket matter. The column advises a direct 16 amp wall socket with a snug fitting 16 amp plug. If you must use an extension board, it should be a 16 amp ISI marked one, and you should not overload it with other appliances.

Also check the cord. Any replacement wire or plug should be 16 amp and ISI marked. Meanwhile, a hot plug, a burning smell or a loose fit is a sign to stop using the heater and have it checked.

Where to place a room heater

Most heater fires start when something flammable sits too close, or when a weak socket overheats. Follow these rules for placement.

• Put the heater on a flat, even floor, not on a wooden stool, table or carpet.
• Keep it at least 3 feet away from curtains, bedding, clothes and walls.
• Do not cover the heater or dry clothes on it while it is on.
• Do not use it in a bathroom or any wet area.

Daily habits that matter

Switch the heater off when you leave the room, and never run it while sleeping. A heater should not be left unattended, particularly in homes with children or pets. Also keep an eye on the room: warm air is nice, but you should still open a window briefly now and then if the room feels stuffy.

If you also run a water heater or geyser in the same circuit, read our guide to gas geyser safety, since overloaded wiring is a shared risk.

Before the winter starts

Take the heater out of storage and inspect the body, the cord and the plug for cracks, burn marks or fraying. Clean away dust gently with the heater unplugged. Then get any repair done by a qualified service centre, not by a local shop that may use poor parts. Finally, read the warning labels in the manual, because manufacturers must give adequate safe use warnings under the Consumer Protection Act, 2019, as the column notes.

For cleaner indoor air this season, our guide to matching an air purifier to your room size may help too.

FAQ

Which ISI standard applies to electric room heaters?

Electric room heaters should meet IS 302-2-30 and carry the ISI mark. Check for the mark on the product before you buy.

Can I plug a room heater into an extension board?

It is better to use a 16 amp wall socket directly. If you must use an extension board, choose a 16 amp ISI marked one and do not plug other appliances into it.

How far should a heater be from curtains and furniture?

Keep it at least 3 feet from curtains, bedding and other flammable things. Also place it on a flat floor, not on a carpet or a wooden stool.