Which heater can I leave on overnight?

Author: Mrs. Anissa Hodkiewicz MD  |  Last update: Sunday, January 4, 2026

What is the safest heater to leave on overnight? While it's not recommended to leave any space heater on if you're not monitoring it, oil-filled, radiant space heaters are considered safer than ceramic convection (hot air) types, according to Roberson. Both of these options are safer than open-coil heaters.

Is there a heater that can be left on all night?

The good news is that modern infrared heaters are very safe to use even when left unattended during the night, even while you are sleeping.

Are any space heaters safe to leave on overnight?

Never leave a space heater unattended, especially when sleeping. Ensure the space heater has a tip-over switch that automatically turns off the unit if it topples. Regularly inspect and maintain your space heater to ensure it is in good working condition.

Is it OK to leave heating on overnight?

There have been many reports from doctors that sleeping with the heating on all night can cause your body to overheat much more quickly. The Sleep Charity advises that an ideal bedroom temperature is 16-18 degrees celsius. Temperatures over 24 degrees celsius can impact your sleep and cause restlessness.

Can I leave an oil space heater on overnight?

Oil-filled heaters are very less likely to cause you any trouble when you leave them on overnight. These radiators have a high boiling point which helps the internal pressure of the oil stays constant. They don't have any moving parts, so you won't have to face any type of noise and sleep interruption.

Is It Cheaper to Leave Your Heating on Constantly?

What is the safest space heater?

Sealed combustion heaters are much safer to operate than other types of space heaters, and operate more efficiently because they do not draw in the heated air from the room and exhaust it to the outdoors. They are also less likely to backdraft and adversely affect indoor air quality.

What is the best heater for overnight use?

Combined with its energy efficiency and quiet operation, the ThermaWave 6 is the best space heater for bedroom use. You can run it through the night without worrying about significant power consumption or safety issues.

What temperature should a house be overnight?

To create that sleep-worthy environment, bedroom temperature should be kept at a consistent 17 degrees Celsius during the night, or at a minimum a few degrees colder than in the daytime.

Is it bad to leave the heat on 24 7?

It isn't bad to run your heating system on a 24/7 basis if outdoor weather conditions demand indoor warmth. For many households, maintaining a constant indoor temperature is the only way to survive the winter. Just be aware that this is likely to cause additional wear and tear on your heating system.

Can I leave an infrared heater on all night?

Infrared panels are made for continuous operation over many hours. Once turned on, they'll heat up in a few minutes and can be left running for extended periods of time without issue. With the incorporated safety features, if the panel gets too hot, they will automatically shut off until the temperature has reduced.

Is it cheaper to turn up the heat or use a space heater?

Using a space heater can be a good way to boost the temperature in a small, drafty room—and it could be less expensive than cranking up your central heating system. But a space heater is economical only if you use it judiciously.

Is it okay to leave a Lasko heater on all night?

Often time you may feel the need to use your Lasko space heater overnight to keep the chill away. We do not recommend, under any circumstances to run a heater unattended.

How long can a heater stay on?

During the Day: It's safe to leave your heater on for 6-8 hours if you're in the room.

Can I sleep with a gas heater on?

Never: Never leave a gas heater running when you go to bed. Never use an unflued gas heater in a bathroom, bedroom or caravan. Toxic gases may cause serious health problems in these situations.

Are oil heaters safer than space heaters?

Safety – Oil room heaters stay warm even after being switched off. Hence, they should be kept away from children in the house. In comparison, electric room heaters cool down as soon as they are switched off. This makes them safer than oil heaters for rooms.

How cold is too cold for a house at night?

The World Health Organization (WHO) recommends setting your thermostat no lower than 64 degrees (F) in the Winter months while people are in the home. If there are infants or elderly individuals, they recommend keeping the temperature at 70 degrees at a minimum.

What temp should my house be if it's 100 outside?

During heat waves, experts, including utility companies, recommend keeping your thermostat no more than 20 degrees cooler than the outdoor temperature. For instance, if it's 100 degrees outside, aim to set your thermostat to at least 80 degrees.

What is the best heat setting at night?

You would think when winter temperatures drop at night you'd want to turn the furnace up when you go to sleep, right? Not so fast. The U.S. Department of Energy says an indoor temperature of 65 degrees Fahrenheit at night is best.

Are any heaters safe to leave on overnight?

Never leave your space heater alone in the room

The best way to prevent a fire is to never leave a space heater running in a room unattended—that way, if anything does go wrong, you can take action quickly.

Is it OK to turn on heater overnight?

Fires are one of the biggest risks associated with leaving electric heaters on all night. If an electric heater has frayed wiring or malfunctions, then there is a high chance of it igniting. Electric heaters also make the air in the room really dry by conducting a lot of heat.

What is the best type of heater for a bedroom?

Radiant heaters are best if you want to heat an area very quickly. On the other hand, if you want to warm an entire room in your home, a convection heater is the better choice. If you're looking for a heater that can stand up to everyday use and abuse, combination heaters are tough to beat.

What is the best portable heater for indoors?

Our Top Picks
  • Best Overall: Dreo Solaris Slim H3 Space Heater at Amazon $75. Jump to Review.
  • Best Value: Kismile Portable Space Heater at Amazon $26. Jump to Review.
  • Best Personal: Vornado Vortex Heater at Amazon $73. Jump to Review.
  • Best for Large Rooms: Pelonis Tower Space Heater at Amazon $95. Jump to Review.

Is it safe to run a space heater all the time?

Space heaters are only meant to run for a few hours, and you should never leave one running overnight. The risk of it falling over, shorting out, or catching your room on fire are just too great.

Previous article
How do you maintain concrete blocks?
Next article
Why do my air filters get dirty so quickly?