Stop Winter Mold: Run a Dehumidifier!

Yes, running a dehumidifier in the winter is necessary to maintain a healthy and comfortable living space. Excessive moisture is a common problem during the winter months because of activities like cooking, taking hot showers, and using humidifiers.

When the temperature drops, the excess moisture can condense and lead to issues like mold growth, dampness, and musty odors. A dehumidifier helps to remove this excess moisture, ensuring that your home stays dry and comfortable. However, it’s important to note that the settings on your humidifier may need to be adjusted in the winter to prevent the air from becoming too dry.

In this article, we’ll explore the benefits of running a dehumidifier in the winter and provide tips on how to properly use one.

Understanding Mold In The Winter

Winter is a time when most people rely on their heating systems to keep their homes cozy. However, running heaters all day long can lead to a buildup of moisture. Excess moisture not only damages your home’s structure, but it can also create a welcoming environment for mold growth.

We will answer the question: do you need to run a dehumidifier in the winter? And focus on understanding mold in the winter.

Why Does Mold Grow In The Winter?

Winter is a difficult time to prevent mold growth in your home. Below are some key points that will help you understand why mold grows in the winter:

  • Humidity: Moisture can easily collect on surfaces during the winter due to indoor heaters and poor ventilation.
  • Temperature: Mold loves slightly cooler temperatures, which usually occur in unused or unheated spaces.
  • Lack of sunlight: Sunlight can prevent mold from forming. However, shorter days and longer nights decrease the amount of sunlight in your home.

What Are The Common Types Of Mold?

Did you know that there are different types of mold, and each type thrives in various environments? Here are some of the most common types of mold:

  • Stachybotrys: Commonly known as black mold, stachybotrys is among the most harmful types of mold.
  • Penicillium: Penicillium often grows in water-damaged homes and is known to cause allergies.
  • Alternaria: If you have ever developed hay fever during the winter, alternaria was potentially responsible for it.

How Does Mold Affect Indoor Air Quality?

Mold can affect the air quality in your home. Once formed, mold releases spores into the air, which contaminate the air you breathe. Here are some key points to help you understand the effect of mold on indoor air quality:

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  • Health effects: Common health concerns related to mold exposure include allergies, respiratory problems, and headaches.
  • Odors: The musty smell associated with mold growth should alert you that there may be mold somewhere in your home.
  • Structural damage: Mold can weaken the structure of your home, making it less safe and sturdy.

Understanding mold in the winter is critical to ensuring that your home is safe and healthy, especially during the colder months. If you want to keep mold at bay, you should remember to maintain proper humidity levels in your home, use a dehumidifier, and allow sunlight to brighten up your home.

The Importance Of Dehumidifiers

Dehumidifiers are appliances designed to reduce humidity levels in the air. Most people tend to think that dehumidifiers are only useful in the summer months when the air feels damp and muggy. However, dehumidifiers are also crucial during the winter season.

How Do Dehumidifiers Work?

Dehumidifiers work by removing moisture from the air and trapping it in a water tank or draining it through a pipe. They use an internal fan to suck in moisture-laden air and pass it over refrigerated coils. When the warm air hits these cool coils, the moisture condenses and forms droplets of water that are collected in the dehumidifier’s tank.

Why Are Dehumidifiers Crucial In Winter?

During the winter season, the air inside your home tends to be drier because of the cold, dry air outside. However, when you heat your home, the air inside becomes warm, and it can hold more moisture. This can lead to an increase in humidity levels, which can cause problems such as condensation on windows, musty odors, and the growth of mold and mildew.

Running a dehumidifier can help maintain optimal humidity levels indoors during winter, preventing the above problems. By removing excess moisture from the air, dehumidifiers create a drier, more comfortable environment in your home.

What Are The Benefits Of Using A Dehumidifier?

Some benefits of using a dehumidifier are:

  • Reduced allergy symptoms: Dehumidifiers can reduce the number of allergens in the air, such as dust mites, mold spores, and pet dander, reducing allergy symptoms.
  • Prevents mold and mildew growth: Mold and mildew can grow in damp areas such as basements, bathrooms, and laundry rooms. Dehumidifiers help prevent mold growth by reducing moisture in the air, making it harder for mold and mildew to thrive.
  • Protects against structural damage: High humidity levels can cause damage to your home’s structure over time. Dehumidifiers prevent moisture from building up, protecting against damage such as warped wood or peeling wallpaper.
  • Reduces energy costs: By reducing humidity levels, dehumidifiers can help your home feel warmer during the winter season, allowing you to lower your thermostat and save money on your energy bills.
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Dehumidifiers have numerous benefits in the winter season. They help maintain optimal humidity levels, prevent mold growth, reduce allergy symptoms, protect against structural damage, and even lower energy costs. By investing in a dehumidifier, you can create a healthier, more comfortable home environment during the colder months.

Finding The Right Dehumidifier For Your Home

Are you considering running a dehumidifier in your home during winter? Here are some things to consider before making your purchase.

What Are The Types Of Dehumidifiers?

There are mainly two types of dehumidifiers – refrigerant and desiccant. Let’s explore both types in detail:

  • Refrigerant dehumidifiers: These dehumidifiers work by using a refrigeration system to cool the air, causing moisture to condense and drip into a collection tank. They are effective at reducing humidity and affordable.
  • Desiccant dehumidifiers: These types of dehumidifiers work by using a material, usually silica gel, to absorb moisture from the air. These dehumidifiers are excellent for lower temperature areas such as garages or basements.

What Capacity Does Your Home Need?

When it comes to dehumidifiers, capacity matters. Here are the things you should consider before choosing a capacity:

  • The size of the area you want to dehumidify
  • Humidity levels in your area
  • The moisture content in the air
  • Your lifestyle habits

For an average-sized home, a 70-pint dehumidifier is a great option.

What Features Should You Look For In A Dehumidifier?

A few features you should consider when purchasing a dehumidifier are:

  • Auto defrost: For colder areas, an auto-defrost feature will help to prevent frost from building up on the condenser coils.
  • Auto shut off: This helps prevent water from overflowing once the collection tank is full.
  • Energy efficiency: Consider purchasing an energy-efficient dehumidifier to save you money in the long run.
  • Noise level: Look for a dehumidifier with a low noise level if you plan to use it in a bedroom or living room.

Finding the right dehumidifier during winter is essential in maintaining comfort and preventing further damage to your home. By following these guidelines, you can find the right dehumidifier for your home to ensure a safe and healthy living environment.

Using Your Dehumidifier Effectively

During winter, keeping your home comfortable and free from moisture can be a hassle, especially if you don’t use your dehumidifier effectively. Although running a dehumidifier in the winter may seem counterintuitive, it can help you maintain the ideal humidity level and protect your home from damage.

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Here are some tips on how to use your dehumidifier effectively.

Where Should You Place Your Dehumidifier?

The location of your dehumidifier can impact its effectiveness. Here are some best practices when it comes to placing your device:

  • Put your dehumidifier in a central location in your home that’s far from walls or furniture.
  • Make sure the device’s air intake is not obstructed by walls, furniture or other objects.
  • Choose a location near an electrical outlet, but make sure the cord is not twisted or tangled.
  • Avoid placing your dehumidifier in basements or crawl spaces as it can freeze or damage the device’s compressor.

What Is The Ideal Humidity Level?

The ideal relative humidity level indoors during the winter should be between 30% to 50%. Maintaining this level can prevent the growth of mold and mildew, protect your furniture and preserve indoor air quality. You can use a hygrometer to measure the relative humidity level in your home and adjust your dehumidifier settings accordingly.

How Often Should You Clean And Maintain Your Dehumidifier?

Cleaning and maintaining your dehumidifier regularly can extend its lifespan and improve its performance. Here are some best practices:

  • Clean the device’s air filter every two weeks. If the filter is excessively dirty, replace it.
  • Empty the water tank frequently, especially if your device is running continuously.
  • Wipe down the exterior with a damp cloth to remove dust and debris.
  • Schedule professional maintenance at least once a year.

Using your dehumidifier correctly is essential for maintaining the ideal indoor humidity level and protecting your home from damage. Make sure to place your device in a suitable area, maintain the ideal humidity level, and clean it frequently for the best performance.


All in all, running a dehumidifier in the winter can be a wise choice for some homeowners. It helps to prevent mold growth, reduce musty smells, and improve air quality. However, it’s important to note that not everyone needs a dehumidifier, and the ideal humidity level varies based on location and personal preference.

Consider monitoring your home’s humidity levels with a hygrometer and consulting with a professional if you have any concerns. Also, be sure to consistently maintain and clean your dehumidifier to promote its efficiency and longevity. By taking these steps, you can achieve a comfortable and healthy home environment during the winter months.

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