Can a dehumidifier be too big for a room?

According to Becca Dodds from the Analox Group (opens in new tab) – a UK-based company that helps to ventilate spaces – yes: a dehumidifier can be too big for your space and the amount of humidity levels you are dealing with.
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Is it better to undersize or oversize a dehumidifier?

Room size. Use the chart under “Selecting a dehumidifier: what you need to know” to determine the size that suits your needs and remember, when it comes to dehumidifiers it's better to oversize than undersize! That way you'll be sure your unit will meet your needs.
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Does it matter what size dehumidifier you use?

If the area is large—say, 1,200 square feet or more—determining the right size dehumidifier is a no-brainer. Whether the air in the room just feels slightly damp or there's noticeable condensation, you'll need a powerful unit to dry the air.
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Do larger dehumidifiers work better?

Larger dehumidifiers remove more water per energy pound spent and run for fewer hours in a given space than smaller ones. The energy saving will almost certainly be greater than the difference in purchase price.
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What happens if you over dehumidify a room?

There is a chance of dehumidifying your home too much with a dehumidifier, especially if you are leaving your dehumidifier running for several hours on a timer unattended. Over-dehumidifying your home can lead to an increased chance of respiratory illnesses and dry and cracked skin.
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What Size Dehumidifier Do I Need? (Dehumidifier Buying Guide)



Can a dehumidifier make a room too dry?

It is unfortunately a common occurrence that a dehumidifier ends up drying out the air in a home so much that it creates a new set of problems, such as the easy spread of illnesses, cracked, dry skin, and problems with static electricity.
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How do you tell if there is too much moisture in your home?

Symptoms include:
  1. Condensation on windows during the winter.
  2. Excessive mildew in the bathroom.
  3. Mold growing on interior surfaces (corner of a closet, kitchen or bathroom).
  4. Peeling, cracking or blistering paint on exterior or interior finishes.
  5. Excessive dust mite populations (a cause of dust allergies).
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What happens if your dehumidifier is too big?

Dodds told us: "If you get a dehumidifier that is too large for the space then there is the possibility that it will make the air excessively dry and uncomfortable to be around." Excessive dryness in your home can have negative connotations for your skin and indoor living organisms such as plants.
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Can dehumidifiers make damp worse?

To put it simply the answer is no, however, if you are looking to reduce high humidity and the chance of condensation occurring then dehumidifiers can be a good solution. To get to the bottom of the problem it is important to understand why there are humidity levels in the first place.
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Where is the best place to put dehumidifier?

The best place to put a dehumidifier is in the location closest to the source of the moisture. In multi-level homes, this means that dehumidifiers should most often be placed in basements or upstairs close to the stairs to your basement. This is because the basement is the most humid place in your home.
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Can you dehumidify too much?

Can you dehumidify too much? There is a chance of dehumidifying your home too much with a dehumidifier, especially if you are leaving your dehumidifier running for several hours on a timer unattended. Over-dehumidifying your home can lead to an increased chance of respiratory illnesses and dry and cracked skin.
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What is the best size dehumidifier for a bedroom?

Excessive moisture in a room can contribute to the spread of mold or mildew and lead to water damage. By reducing high humidity, dehumidifiers prevent rooms from smelling musty.
...
The Right Dehumidifier Size for Your Space
  • Large: 45- to 50-pint capacity.
  • Medium: 30-pint capacity.
  • Small: 20- to 22-pint capacity.
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How do you size a dehumidifier for a room?

Look for a dehumidifier with a 10 pint removal capacity for a 500 square foot room. If your room exceeds 500 square feet, you want an additional 4 pints for every 500 square feet. If your room is 1,000 square feet, for example, you want at least a 14 pint removal capacity to maximize moisture removal.
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Is it OK to be in the same room as a dehumidifier?

Yes it is perfectly safe to sleep in the same room as a dehumidifier. If you are particularly interested in a dehumidifier for the bedroom the noise level will be particularly important to you.
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Do dehumidifiers use a lot of electricity?

The EPA calculates that dehumidifiers account for less than 1% of your annual electricity usage. But how much electricity your humidifier actually consumes per hour depends on the size and type of your humidifier. Some dehumidifiers are more efficient than others.
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Does a dehumidifier make a room hotter or colder?

Yes, dehumidifiers naturally create a small amount of heat as they operate. But most customers don't notice it for a few reasons: (1) it's a very slight increase and (2) since dehumidifiers remove moisture from rooms, they naturally make rooms feel cooler and more comfortable.
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Does mold go away with a dehumidifier?

Mould will easily grow and spread if the right conditions are present. So, dehumidifiers don't kill mould, but they can help to prevent it from growing inside your home by reducing humidity. However, the best way to deal with it is to get rid of its source.
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When should you not use a dehumidifier?

Most dehumidifiers should not be operated in temperatures below 60° F, since the moisture removed from the indoor air can freeze when it condenses on the cooling coils, which can damage the unit.
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Do dehumidifiers pull mold out of the air?

Can a Dehumidifier Remove Mold? Simply put, dehumidifiers cannot remove mold. The machine is designed to remove moisture in the air. This means that if there is already a presence of mildew in a home or building, it will not be removed just by working to reduce the moisture after the fact.
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Is it OK to leave a dehumidifier on all day?

An average unit in your space, if it was operating correctly, should extract the moisture to around 50 to 55% Relative Humidity. With this assumption, you can safely run your dehumidifier for about 12 hours a day.
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Should you leave a dehumidifier on all night?

Can I leave the dehumidifier running at night? Yes, we recommend using a dehumidifier 24hrs, however, be aware that there will always be a noise generated from the machine when it is operating.
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How much water should a dehumidifier remove in a day?

Attention should be given to the placement of your unit. It should be positioned in proximity to a sump pump or drain and the hose should be placed outside of walkways to avoid a tripping hazard. Most dehumidifiers will remove between 30 and 70 pints of water per day.
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What are three signs that a home is too dry?

Signs The Air In Your House Is Too Dry
  • Irritated sinus and nose bleeds can make it hard to breathe or sleep at night. If you wake up in the middle of the night coughing, it might be from dry indoor air.
  • Asthma and allergy flare-ups. ...
  • Increase in static electricity. ...
  • Damage to wood in your home.
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How do you tell if there is moisture in the walls?

Rather than relying on perceived moisture in the air, here are six telltale signs that you may have a moisture problem in your home.
  1. Musty Odors from Mold and Mildew. ...
  2. Visible Mold or Mildew. ...
  3. Rotten Wood. ...
  4. Sticking Doors and Windows. ...
  5. Floorboard Issues. ...
  6. Bubbling or Peeling Wallpaper or Paint. ...
  7. Water Stains On Your Ceiling.
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Is 70 humidity in a house too high?

The Health and Safety Executive recommends that relative humidity indoors should be maintained at 40-70%, while other experts recommend that the range should be 30-60%. Most people find 30-60% most comfortable and this is the level that Airthings recommends.
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