It is actually better to leave the air purifier on all night instead of turning it on and off repeatedly, especially if it has a “Sleep” mode.
Air purifiers remove particles from the air in your space by pushing the air through filters, which leaves you with cleaner air.
It is fine to leave your air purifier on all night and this can actually be quite beneficial, especially if your air purifier has a “Sleep” mode.
How air purifiers work
The reality is that most people who have an air purifier are worried about increased pollution and decreasing air quality in their homes.
It is also well-known that air purifiers and the subsequent cleaner air that they produce can be beneficial for your physical and mental health, as well as your overall wellness.
However, few people know how air purifiers actually work. Fortunately, this is a fairly simple process to understand. Air purifiers draw in air from your space.
This air, with all its particles and pollutants, is then pushed through a series of filters in which these particles get stuck, leaving the air that is released by the air purifier much cleaner.
Is it OK to leave the air purifier on all night?
Since the clean air coming out of your air purifier is beneficial for you, it makes sense to wonder whether you can take advantage of inhaling this cleaner air while you are in one space throughout the night.
Fortunately, leaving the air purifier on while you sleep all night is not only okay, but it is very good for your health and the quality of your sleep.
This is because even though it may feel as though there is much more pollution in the air during the day when you are opening and closing doors to let outdoor air in, cooking, smoking, and more, an air purifier usually takes a few hours to completely sanitise the air in a space.
This means that if you switch the air purifier off while you sleep, your machine may not have completely purified all the air in your space yet, and new pollutants could also be building up again and your machine will have to start its work from scratch once you turn it back on.
In fact, some experts even recommend that the best place to position your air purifier in your bedroom is right on your nightstand as you sleep, because this can be beneficial for the quality of your sleep.
You will, of course, need to weigh up these benefits against some of the drawbacks of having the air purifier on all night long, like increased levels of noise and electricity usage, but most of these issues can be solved by purchasing the right air purifier.
The benefits of having your air purifier on while you sleep
Generally, having an air purifier on while you sleep provides all of the same benefits that these machines are known for during the day, such as minimising the chances of inhaling allergens or some relief in terms of asthma symptoms.
However, since we can spend up to a third of our life sleeping, and this is a time when we are typically in the same space for a few uninterrupted hours, these benefits are magnified.
Your sleep will also be sounder and you will have less wear and tear on your air purifier as explained above, when you leave it on all night.
The drawbacks of having your air purifier on all night
The only real drawback of having your air purifier on all night is that the machine may use more power this way and the noise may hinder your sleep.
If you are concerned about the amount of power that your air purifier is using when you leave it on during the night, you can use a watt meter to monitor your electricity usage.
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But you should keep in mind that most air purifiers take a few hours to clean the air in a space, and continuously turning it on and off may not save you that much electricity in the long term anyway.
Most modern air purifiers also have an “Eco” or “Sleep” mode, which can help minimise these drawbacks.
The best air purifiers with a “Sleep” mode
Air purifier manufacturers have designed the Sleep and Eco modes on their machines to make them quieter and more efficient so that you can have peace of mind when you leave the air purifier on through the night, such as:
| Air purifier | Price | “Sleep” mode features | Available on Amazon |
| Levoit Core 300 | $99.95 | Dimmed lights and low fan speed |   |
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| Dyson HP02Pure Hot + Cool | $617.89 | Quiet operation and dimmed lights |   |
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