Will a Dehumidifier Cool a Room? (All Questions Answered)

While a dehumidifier can help cool a room, it will not be possible to fully cool down a room like an air conditioner would.

However, this doesn’t mean that you can’t enjoy cooler temperatures from a dehumidifier!

Below we’ll get into how dehumidifiers work and how they can help cool down your room.

How Do Dehumidifiers Work?

Understanding how dehumidifiers work is a fundamental part of understanding their role in improving indoor air quality. Two types of dehumidifiers predominantly seen in homes and businesses are the standard refrigerant dehumidifiers and desiccant dehumidifiers.

Refrigerant dehumidifiers, including popular Midea 50-Pint EnergyStar Smart dehumidifiers, operate using cold coils, also known as evaporator coils.

The device draws in air from the room, passes it over these cold coils, causing the temperature to drop below its dew point.

This process turns the excess moisture in the air into water droplets that are then collected in a water reservoir or drained out through a hose.

On the other hand, desiccant dehumidifiers use a drying material or desiccant to absorb moisture from the air. Once saturated, the material is heated to release the water.

Can a Dehumidifier Cool a Room?

I can assure you that the primary role of a dehumidifier is not to cool a room. It is to regulate the humidity level and remove excess moisture to maintain a comfortable environment and improve indoor air quality.

However, the reduction in humidity can cause the room to feel cooler. This is because high humidity can create an uncomfortable degree of perceived heat as it inhibits the evaporation of sweat, a natural cooling process of the body.

Can Dehumidifiers Cool a House?

The principles of a dehumidifier cool a room can be extended to cooling a house. By decreasing the humidity level across multiple rooms, a dehumidifier can make the overall environment within the house feel cooler.

Best Ways to Use a Dehumidifier Efficiently

Using a dehumidifier efficiently can save energy costs and improve indoor air quality. Here are some best practices:

  1. Appropriate Placement: Dehumidifiers are most effective when placed in areas with excess humidity like basements and bathrooms.
  2. Regular Maintenance: Cleaning your dehumidifier and emptying its water reservoir regularly helps in its efficient functioning.
  3. Use a Hygrometer: This handy appliance can measure the humidity level in your home and help you set the ideal humidity level on your dehumidifier.
  4. Choose the Right Size Dehumidifier: Larger capacity dehumidifiers or whole-home dehumidifiers are great for large square footage areas or extremely humid environments. For a mid-sized room, a portable unit could be sufficient.

Can You Use a Dehumidifier in a Hot Room?

Yes, you can use a dehumidifier in a hot room. A dehumidifier works by removing the excess moisture from the air, making it less humid and consequently, less hot.

Remember, they do not cool the air; instead, they make the hot room more bearable by reducing humidity.

Can You Use a Dehumidifier Instead of an Air Conditioner?

While dehumidifiers can make the room feel less humid and thus cooler, they can’t replace the functionality of air conditioning units, which actively cool the air.

Do Dehumidifiers Make Your Room Warmer?

A common misconception about dehumidifiers is that they make the room warmer. The truth is, while a dehumidifier does generate some heat as it operates, it does not significantly heat a room unless it’s a very small and enclosed space.

Will a Dehumidifier and a Fan Cool a Room?

A dehumidifier used in conjunction with a fan can make a room feel cooler. The dehumidifier removes excess humidity while the fan helps circulate the air, aiding in evaporation from your skin, and making the room feel cooler.

Do Dehumidifiers Cool or Heat a Room?

The primary function of a dehumidifier is to maintain a comfortable humidity level by removing excess moisture, thereby improving the indoor air quality. It does not significantly cool or heat a room.

Should You Run a Dehumidifier in the Summer?

Running a dehumidifier in the summer months, especially in humid climates, can be quite beneficial.

High humidity, combined with heat, can result in a musty smell and lead to the growth of mold. Using a dehumidifier can help alleviate these issues.

Is it OK to Sleep in a Room With a Dehumidifier?

Yes, it’s generally safe to sleep in a room with a dehumidifier running. However, ensuring it is clean and well-maintained is crucial to avoid issues such as mold growth that can cause respiratory discomfort.

If the dehumidifier makes the room excessively dry, it might lead to skin irritations or aggravate allergy symptoms, so maintaining an ideal humidity level is important.

In summary, while dehumidifiers can’t replace air conditioners, they can significantly enhance comfort in humid environments by reducing humidity. Their role in improving indoor air quality makes them invaluable, particularly in hot, humid summer months.

So, understanding the relationship between dehumidifiers and air conditioning, and using them appropriately, can lead to energy-efficient and comfortable living spaces.


While dehumidifiers do not directly cool rooms or houses, they can significantly improve comfort levels by reducing humidity. When used efficiently and in combination with other cooling strategies, such as fans or air conditioning, they can help create a more comfortable and healthy living environment.

About Roy Cohen

Roy Cohen has a burning passion for heating, cooling, and ventilation. He aims to help you save money on expensive repairs and bring you the best HVAC products. He has years of experience behind him in HVAC repair and garage maintenance.

You can find Roy at his LinkedIn or his email: [email protected]

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