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Space heater safety: the rules the fire agencies agree on

Updated September 19, 2026

Three rules matter most, and every agency we read repeats them. Keep the heater at least three feet from anything that can burn. Plug it straight into a wall outlet, never an extension cord or power strip. Turn it off when you leave the room or go to sleep. The rest of this page is the detail, with who says what.

Why this is not fine print

The CPSC estimates that portable heaters, including electric space heaters, were involved in an average of 1,600 fires a year from 2020 to 2022, with about 70 deaths and 150 injuries a year. The U.S. Fire Administration says portable heater fires were only 3 percent of home heating fires in 2017 to 2019 but 41 percent of the fatal ones. NFPA says space heaters and heating stoves account for nearly a third of home heating equipment fires and over seven out of ten of the deaths, based on 2020 to 2024 averages.

The rules

1. Three feet of clearance. The CPSC says to keep portable heaters at least three feet from drapes, furniture, bedding and other things that burn. ESFI adds papers, clothing and rugs to the list.
2. Wall outlet only. The CPSC says never to plug an electric heater into an extension cord or power strip. ESFI says the cord or strip can overheat and start a fire, and adds: do not plug anything else into the same outlet as the heater.
3. Off when you sleep or leave. The CPSC says to turn heaters off when sleeping. ESFI says never leave one unattended. The U.S. Fire Administration says to turn it off when leaving the room or going to bed.
4. Flat, level floor. ESFI says to put heaters on level, flat surfaces, and never on cabinets, tables, furniture or carpet, which can overheat.
5. Look for a test lab mark. ESFI says to check for a label showing the heater is listed by a recognized testing laboratory. See safety marks and recalls.
6. Inspect the plug and cord. ESFI says to check for cracked or broken plugs and loose connections before each use, and not to use a heater with a frayed or damaged cord.
7. Heat only. ESFI says space heaters are for supplemental heat, never for drying clothes, warming bedding, cooking or thawing pipes. It also says to unplug and store the heater when it is not in use.

ESFI also reminds you to have smoke alarms on every floor and outside sleeping areas, and to keep children and pets from playing close to a heater.

What the listings do and do not name

All seven listings name overheat protection or a thermal cut-off. Four name a tip-over switch: the two DREO heaters, the Dr Infrared Heater DR-968 and the Amazon Basics Ceramic 1500W. We did not see one named for the Lasko 23 inch Ceramic Tower 751320, the De'Longhi EW7707CM or the Lasko MyHeat 101, on Amazon or on the Lasko and De'Longhi pages we read. That is not proof they lack one. If a tip-over switch matters in your home, because of pets or small children, pick a listing that names it or check the manual first.

A shutoff switch is a backup. It does not replace the three foot rule. A heater that tips onto bedding can still scorch it before the switch acts, and no switch protects against a power strip that overheats.

About bedrooms

Many people buy a heater for a cold bedroom. The agencies above all say to turn it off before sleep. The workable plan is to warm the room before bed, then switch the heater off. A timer helps. The DREO Atom One and Dr Infrared Heater DR-968 have 12 hour timers and the Lasko 23 inch Ceramic Tower 751320 has a 7 hour timer, but a timer is a convenience, not a safety device.

Check your own room with the size and power use calculator, or compare all seven picks on the roundup page.