Sleep with heating – is it unhealthy and what should you watch out for?

In order for you to feel comfortable in the bedroom at night and to get your well-deserved sleep, a pleasant temperature must prevail. In summer, when the bedroom heats up and it is too warm, it disturbs your sleep. Likewise, a bedroom that is too cold is not very comfortable in winter.

Because of this, you could leave the heater on all night . But is this a good idea and what is the ideal sleeping environment?

The temperature in the bedroom has a major impact on how well you sleep at night. If it is too warm or too cold, this disturbs your sleep and affects your health. In a bedroom that is too cold , there is a great risk that your immune system will be weakened and that cold viruses will spread better. Infections are more common and you feel less fit in winter.

For the bedroom, the recommendation applies that a temperature between 16 and 18 degrees should be maintained. This means that it is much cooler in this room than in the living room. There it is usually more than 20 degrees to create a pleasant atmosphere.

The lower room temperature in the bedroom is not a problem. With a cozy blanket you keep yourself warm so that the night is not perceived as too cold.

A temperature lower than 16 degrees is not recommended. In addition to the increasing risk of infection, the cold also contributes to the formation of mold . The cold air can absorb less moisture, so that it condenses on the windows and mold forms on the walls facing the outside area.

If you prefer a higher room temperature , the heating may have to run the entire night. However, you should be careful when heating.


In general, a room temperature of 16 to 18 degrees is recommended for the bedroom. If you like it warmer, the heater could run at night to maintain the desired temperature. Heating at night is only recommended to a limited extent for several reasons.


The colder bedroom makes perfect sense. At lower temperatures, you are more likely to fall asleep and wake up more relaxed in the morning. The body regenerates and the processes involve a lot of work. This already generates heat that is sufficient to prevent it from cooling down.

If you turn on the heating, it will be too warm in the bedroom. The effects are similar to those in hot summer. You find it difficult to fall asleep and you wake up earlier. You don’t feel rested at all and would like to go back to sleep. In order to sleep better, only the air conditioning in the bedroom serves as a solution against the hot temperatures.


Heating at night also means that you sweat more. You lose more than half a liter of fluid in your sleep anyway. You sweat this out of your body.

If it is warmer, the loss of fluids increases. This puts a lot of strain on your body. You become dehydrated during the night and get up in the morning with a headache . In addition, the regeneration of your body is impaired , so that sleep is perceived as less restful.

The moisture is absorbed by the pillow and the mattress. You may wake up in the morning on a completely soaked pillow . In these conditions, pathogens multiply rapidly, so that hygiene suffers. You will need to wash the bedding more often and take extra care to let the mattress lose moisture.


If the heating stays on at night, there is also the risk that your mucous membranes will dry out. The dry heating air reduces the humidity in the bedroom . Pathogens can more easily overcome the body’s natural barriers and you are more likely to suffer from colds.

It is therefore particularly important in winter to keep the humidity in an optimal range. While too high humidity supports mold growth, too low humidity turns out to be harmful to health.


Not to be neglected are the heating costs. If your bedroom is particularly large and the insulation is not up to date, heating can be a huge cost .

Instead of paying the running heating bills, it might be better to invest in a warmer blanket . Then you also protect yourself from the cold, but maintain a better sleeping climate.


There are several reasons that speak against heating while you sleep But how do you keep a comfortable sleeping environment?


The heating does not necessarily have to be turned off. On cold winter nights, without the heating, the temperature would possibly be well below 16 degrees. So it is justified to turn on the heating. However, you should make sure that the heating is not set too warm . Leave it at a comfortable room temperature. In most cases, level 2 is sufficient to keep the bedroom warm.


In winter there is a risk that the heating will lead to a drop in humidity at night . The humidity should not fall below 50%, otherwise your health will be attacked.

To counteract the dry heating air, you can set up water bowls in the room . These continuously give off moisture so that the room air remains pleasant. There are also variants for this that you can hang directly on the heater.

Also ensure plants in the bedroom for a higher humidity. Water them regularly to find a comfortable sleeping environment in winter. For the summer , however, it might be better to put the plants on the balcony or in another room. Otherwise the humidity would rise even further on hot days and you will feel like in a sauna.


When sleeping, the body’s own processes run at full speed. Sufficient oxygen is necessary so that regeneration is not disturbed .

Bring some fresh air in the bedroom. Intermittent ventilation is ideal for this before going to bed. Around 10 minutes are sufficient to supply the room with oxygen again. You should also carry out burst ventilation in the winter months in order to maintain a good indoor climate.


In order for you to feel comfortable in the bedroom and sleep optimally , a certain room temperature is necessary. Usually this is between 16 and 18 degrees.

If it is too cold in the room, you should avoid turning on the heating as much as possible. It dries out the mucous membranes and the heat can lead to increased sweating. The indoor climate suffers and your sleep is disturbed.

Only if the temperature drops too much is it advisable to use the heating moderately. Do not heat the room, but try to leave it at a room temperature of no more than 18 degrees. Pay attention to a sufficient humidity and shock ventilating to achieve optimal sleeping comfort.

If you pay attention to these things, there is no risk if you leave the heating on while you sleep.

Jamie Clark

Hello, I’m Jamie Clark, 32 years old, and I have been living in the USA for a few years.
Since I was a child, I have suffered from a house dust allergy, severely affecting me. I felt the effects both while exercising and while sleeping. Constant sneezing after getting up and difficult breathing were the consequences. The allergy has also developed into asthma, which is still a sporting restriction today.

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