When using your dehumidifier for the first time, it would be good practice to run it continuously until the RH drops below the 60% mark or you fill the water tank, whichever comes first. Once the relative humidity is below 60%, you can use the dehumidifier during the day and turn it off during the night. For a room with high levels of humid air, leaving the dehumidifier running all night seems to be the best option. Is it safe to leave dehumidifiers on? The constant operation of a dehumidifier naturally carries the risk of overheating, which could cause a fire.
However, this is most likely to happen when the device lacks an automatic defrost function and runs under unhealthy maintenance conditions. It continues with the question: is it safe to leave dehumidifiers turned on? The other important feature that you must have is an automatic shutdown in case of tank overflow. With these two features that back you up, the dehumidifier can operate safely without fear of a fire or overflow throughout the night. Overloaded outlets are another cause of electrical fire hazard, so never overload an extension cord with a dehumidifier.
If the dehumidifier has a filter, make sure that it does not clog and does not wet the appliance. However, if intentional, make sure that the dehumidifier uses a continuous drain, so that the tank never fills up and causes it to close. The U.S. Department of Energy (DOE) files the dehumidifier as “low-electricity” HVAC devices.
You can sleep with a dehumidifier turned on as long as the conditions are perfect and the unit does not make annoying noises. We'll also answer some of the similar questions you may have before leaving the dehumidifier turned on overnight. If your dehumidifier supports the continuous drain option like that of the Danby Energy Star 50 pint dehumidifier, which has multiple drain options, you can place the unit near the toilet and connect a hose for continuous water flow. Apart from this, there are homeowners who may feel more comfortable leaving the dehumidifier turned on and running even when they are not at home.
But, despite being a very useful appliance in homes, dehumidifiers are not impeccable, especially when there is no proper maintenance. If you notice that the dehumidifier always works overtime, I strongly recommend that you consider the root cause of the extra moisture and fix it permanently. Although it is safe to keep the dehumidifier running even without supervision to solve the problem of high humidity, this is not a long-term solution. You can usually leave the dehumidifier turned on for 12 hours a day, which is the golden rule assumed, to remove the extra moisture lurking inside the house.
So is it safe to leave a dehumidifier on all night? Having the dehumidifier running all night is safe and also a good idea if the relative humidity levels are high. Most of the time, dehumidifiers have to work for an extended period of time, to affect the relative humidity of the atmosphere, and since they are powered by electrical energy, it can be risky to go out of more than one way.