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What You Need To Know About How Long A Humidifier Should Run?

What You Need To Know About How Long A Humidifier Should Run?

It can be difficult to figure out how to use the devices in your home at times. Have you recently purchased a humidifier but are unsure how long you should leave it on?

It’s best to keep humidifiers on for 8-12 hours per day. Although there is no hard and fast rule, humidifiers will add excess moisture to your home, which isn’t always a good thing. Having said that, using a humidifier overnight is a great way to reap its healing benefits while also keeping your space mold and mildew-free.

As we begin, we will discuss humidifiers in general and share some tips for using yours.

How Long Does It Take A Humidifier To Work?

What You Need To Know About How Long A Humidifier Should Run?

You could get anywhere from eight to more than 16 hours of misting depending on the size of your humidifier. You can expect 11-16 hours of continuous power from a two or three-gallon humidifier, which is more than enough per day.

As previously stated, you don’t want to run your humidifier for more than 12 hours per day, so a multi-gallon device isn’t usually necessary. Having said that, most new humidifiers will have a variety of time settings from which to choose based on your schedule.

Do Humidifiers Turn Off Automatically?

Yes, humidifiers usually shut off on their own. You don’t have to worry about a humidifier turning off when its timer expires or it runs out of water.

Of course, this is dependent on your device’s settings, but most new humidifiers will have an auto-turn-off feature.

Is It Bad To Leave A Humidifier On All Night?

What You Need To Know About How Long A Humidifier Should Run?

Although we don’t recommend going overboard, leaving your humidifier on all night is a good idea. Not only will this moisten your skin, mouth, and throat, but it is also a simple way to improve your breathing while sleeping.

To prevent mold and mildew from forming, make sure the humidity in your space is 30% or lower before using a humidifier overnight. It’s also important to clean your humidifier on a regular basis, especially if you leave it on overnight, so you know the air you’re breathing is completely safe.

How Close Should You Keep A Humidifier To Your Bed?

It’s best to keep your humidifier at least three feet away from your bed. Although an extra mist may feel nice, being exposed to too much humidity in close proximity can cause breathing difficulties, making for unsafe sleeping conditions.

You also want to keep your humidifier in an open area so that it can distribute moisture evenly throughout your bedroom.

Can You Humidify A Room Too Much?

What You Need To Know About How Long A Humidifier Should Run?

Yes, a room can become overly humid. As previously stated, turning on a humidifier if your space is above 30% humidity is not a good idea because it can lead to unsafe breathing conditions.

Taking a deep breath is a good way to tell if your room is too humid. If the air in your space feels excessively moist or difficult to breathe in, you’ve gone too far with the humidity and should unplug your device for a day or two.

How Do I Determine The Humidity Levels In A Room?

It shouldn’t be too difficult to test the humidity in your room. Our first suggestion is to buy a humidity tester, which will allow you to monitor the moisture levels in the air.

If you don’t have access to a testing device, you can always use the old ice cube trick. To accomplish this:

  • Fill a clear glass with two to three ice cubes.
  • Fill your glass halfway with water and stir it around with the ice.
  • Wait three to four minutes while leaving your glass alone.
  • If there is condensation on the outside of the glass, it indicates that your room is too humid.

Of course, this isn’t as accurate as a real meter, but it will tell you if there’s too much moisture in the air in your room.

Homidy Indoor Humidity Meter

This humidity meter has a 3.5-inch display, a clock, monitors temperature and humidity changes in the air, and will notify you if your room is not in a comfortable temperature range.

Where Should You Put A Humidifier In Your Room?

A humidifier should be kept in an open area of your room, such as on a shelf or table. Make sure your humidifier is placed far enough away from you in the bedroom so that it does not create too much moisture while you sleep.

Three or more feet away from your bed is ideal, but six feet is our recommendation. Again, just because the mist from your humidifier feels nice doesn’t always mean it’s good for you.

Where Should A Humidifier Not Be Used?

The list of places where a humidifier should not be placed is endless. Here are a few things to avoid:

  • Circuits and electrical outlets
  • Technology (TVs, computers, plug-in appliances) (TVs, computers, plug-in appliances)
  • The use of direct sunlight
  • Rugs and carpets
  • Restricted areas

Although these are just a few, keep a humidifier away from anything remotely electrical, and avoid placing it too close to a window/direct sunlight.

Is It Okay To Leave My Humidifier On The Floor?

We would not advise leaving your humidifier on the floor. In general, your humidifier should be at least two feet above ground level.

Placing a humidifier too close to the floor will alter how it interacts with the rest of the air in your space, effectively rendering it ineffective. This can also result in water damage to your flooring, so keep your humidifier at least two to three feet off the ground.

Can A Humidifier Be Used In The Basement?

Although it may appear to be a good idea, you should not install a humidifier in your basement. Because mold and mildew thrive in basement environments, adding extra moisture to the air can lead to serious problems.

However, using a dehumidifier in the basement is a good way to remove excess water from the air rather than creating it, so you may want to consider that option.

Basement Dehumidifier Vacplus

This dehumidifier covers 1,500 square feet, holds 30 pints, comes with a drain hose, and turns off automatically when full.

Is It True That A Humidifier Makes A Room Colder?

Humidifiers usually have no effect on the temperature of a room. Because of the increased moisture in the air, using a humidifier can actually make your space feel warmer.

However, a humidifier may help maintain the climate of your room if the weather outside is colder, but don’t rely on one in warmer temperatures. If you need to cool down your space, use a fan or turn on the air conditioner.

Is There Any Advantage To Using A Humidifier?

Yes! Using a humidifier in your home can help increase moisture in the air, which is beneficial for people who suffer from respiratory problems or have dry skin. Humidifiers are also useful for people who snore or have trouble sleeping, which is why they are so popular in bedrooms.

Extra moisture in the air can also help speed up cold symptoms such as congestion, so try one the next time you’re sick. Of course, too much moisture can exacerbate these issues, so try to keep your daily humidifier use to less than 12 hours.


Whether you’ve used a humidifier before or are considering getting one, knowing how long to leave it on is critical. According to our findings, it’s best to limit your humidifier use to around 12 hours per day to avoid mold and mildew growth in your home.

It’s also not good to breathe in too much moisture, so keep your humidifier at least three feet away from your bed. You should also place your humidifier two to three feet off the ground and in an open area so that it can properly distribute water into the air.

Regardless of where you keep your humidifier, remember to turn it off after 8-12 hours and to test the humidity levels in your room on a regular basis.

What You Need To Know About How Long A Humidifier Should Run?

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Written by HVAC Contributor

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