When To Use Dehumidifier With Air Conditioner

When to use a dehumidifier with an air conditioner? The answer to this question will surprise you. A dehumidifier can remove the humidity only to remove the sweaty condition. On the other hand, an air conditioner will keep the room cool when slightly removing the humidity also. But the use of these two at the same time will boost comfort by controlling the humid condition. So, keep reading to explore more about this topic.

When To Use Dehumidifier With Air Conditioner

When to use dehumidifier with air conditioner 

Use a dehumidifier with an air conditioner when the humidity level is higher, and your AC fails to lower the existing humidity alone. You already know an air conditioner lowers the humidity of the incoming air slightly. But, your air conditioners can’t dehumidify the whole incoming air if the climates are extremely humid. And the use of a dehumidifier with an air conditioner comes into play. 

A dehumidifier reduces the humidity level. Therefore, it requires less energy to run. When you use a dehumidifier with your air conditioner running, the AC unit lowers the energy use. Because the dehumidifier makes it easy to remove moisture or humidity from your room. In return, your air conditioner can cool your room faster than before. 

When You Should Use Dehumidifier Alone

The Department of Energy suggests setting the air conditioner to 78F and recommends using the combination of fan and dehumidifier to keep the AC cool when it’s off. 

If the temperature crosses the number, your air conditioner will turn on to supplement your dehumidifier. Keep in mind; a dehumidifier can also reduce the burden of your AC when it’s pulling humidity from the air. Humid air consumes more energy than dry air. And the dehumidifier will help to save energy though it increases temperature by 1-2 degrees. 

Indeed, you should run a dehumidifier if you want to reduce the electricity bills, reduce wear & tear on your AC, and improve air quality. 

Using Air Conditioner With Dehumidifier or The Dehumidifier Only: Which Is Better?

It depends on what goal you want to accomplish. If your aim is simply to get the humidity out of your room and you don’t need to cool the room, use a dehumidifier instead of AC. Operating a dehumidifier will increase the temperature of a room. So, if you want to stay cool and dry, you should have an air conditioner. 

You know an air conditioner can also dehumidify the incoming air slightly. For example, a portable air conditioner like the Soleus LX-140 can eliminate up to 60 pints of water out of the air a day. In contrast, a full-size air conditioner has greater capacity and can effectively reduce the moisture in a home. 

However, the downside of using an ac is- it requires more energy to run, adds bucks to your spending list. On the other hand, a dehumidifier requires less electricity to operate, while removing humidity perfectly. 

But the downside of using a dehumidifier is- it can only remove humidity. It can’t cool your room. So, you can’t escape from the scorching heat of a hot summer day. 

In short, it comes down to your budget and needs. If you need to remove the humidity of your room only, don’t hesitate to go for the dehumidifier. On the other hand, you should go for an air conditioner if you want to stay cool & dry. Alternatively, you can use both to make your room comfier. 

Benefits of Using Dehumidifier With Air Conditioner

Let’s go to the point straight and know the benefits you can enjoy when using a dehumidifier with an air conditioner. 

  • Operating a dehumidifier with an air conditioner will improve your comfort level. The dehumidifier reduces the humidity level and increases the comfort level. At the same time, it reduces the burden placed on your AC, and your AC requires less energy use to cool down a room. 
  • Maintain the health of you and your family by controlling the humidity level of your home.
  • Excessive humidity in your home can thrive the growth of mold or mildew on your clothes. But the dehumidifier reduces the humidity level and prevents the growth of mold.
  • Require less energy to run your AC, which saves you money.


How much humidity does an air conditioner remove?

An air conditioner can remove between 5-20 gallons of water from your home’s air per day, depending on how hot and humid it is outside. 

How to tell if my ac has a dehumidifier?

You can easily tell it by checking the specification sheet. However, every AC can remove humidity from the air slightly. But, you can’t replace the need of a dehumidifier with an air conditioner.

What is the best time of day to use a dehumidifier?

The best time of day to use a dehumidifier is between 10 pm to 7 am as people use less energy at this time. However, we recommend you use the dehumidifier when your household is affected by humidity. 

How long does it take for a dehumidifier to dry out a room?

It depends on how large the area is. If you want to dehumidify a large area, it requires a few days to weeks to dry out a room using your dehumidifier. 

How many hours a day should I run my dehumidifier?

It depends on the dampness condition of your room. We recommend running your dehumidifier for at least 12 hours a day to dry the room.


Run your dehumidifier with an air conditioner if the humidity level is high and you want to stay cool & dry at the same time. 

However, you can use the dehumidifier or the air conditioner only based on your need. If you just want to remove humidity, use the dehumidifier only. On the other hand, use the air conditioner only if you want to cool down the room only.

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