Dehumidifiers are entirely worth it if your home's indoor humidity consistently stays above 60%. They provide immense value by preventing toxic mold, reducing musty odors, and protecting your property from damp-related damage.
While dehumidifiers are essential for controlling mold and protecting your home in damp climates, they have several notable drawbacks. These include increased electricity bills, the need for regular maintenance, disruptive operating noise, and the potential to make your indoor air uncomfortably dry.
Yes, a dehumidifier can be highly beneficial for managing COPD, provided your home has high humidity. It makes breathing easier by lightening the air and preventing mold and dust mites, which are common respiratory triggers.
You probably need a dehumidifier if the relative humidity (RH) in your home consistently stays above 50% to 55%. Excess moisture creates an ideal breeding ground for mold, mildew, and dust mites, and it can cause musty odors or damage to your home’s structure and belongings.
Most energy-efficient dehumidifiers for home use (rated between 150W and 300W) cost around 5-15p per hour to run, depending on your electricity rate and model size.
Yes, you can safely leave a dehumidifier on 24/7. However, rather than running the compressor constantly, you should set the built-in humidistat to your target humidity (typically between 40% and 50%). The unit will then cycle on and off automatically, maintaining a healthy environment without wasting electricity.
Rock salt: Place bowls of rock salt in damp areas like closets or basements. It draws in moisture and requires no energy. Charcoal briquettes: Like rock salt, they absorb humidity and can be placed discreetly around the home.
Avoid running a dehumidifier if indoor humidity is already within the ideal 30%–50% range, as lowering it further can dry the air excessively. Don't use it in extremely cold spaces below the unit's operating temperature, and avoid areas with very little moisture where it won't make a meaningful difference.
The best place to put a dehumidifier is in a central, open area on the floor of the room or floor with the highest humidity. By keeping interior doors open, the unit can circulate dry air and draw in moisture from the entire home.
Yes, running a dehumidifier does consume electricity and will increase your electric bill, typically costing between $𝟏𝟓 and $𝟒𝟎 per month depending on your usage and local rates.
Neither extreme dry nor extreme humid air is best for COPD; the ideal environment is moderate humidity, typically between 30% and 50%. Excessive humidity makes air feel heavy and harder to breathe, while too little humidity dries out airways and causes irritation.
Some of the main things you'll be advised to do are outlined below.
Yes, dehumidifiers can cause breathing problems, usually because they over-dry the air or circulate airborne irritants. While designed to improve air quality, improper use can lead to respiratory issues like a dry cough, sore throat, or sinus irritation.
Dehumidifier problems usually stem from airflow blockages, temperature issues, or a full water tank. To get your unit running efficiently again, always empty the bucket, clean the air filter, and ensure the surrounding room is above 41∘F41 raised to the composed with power F41∘F [5∘C5 raised to the composed with power C5∘C].
#1 – The Best Overall – Midea Cube
Simply put, the Midea Cube (MAD50S1QWT) is by far the best dehumidifier we've tested as of the writing of this guide in spring 2026. It is unequivocally the best dehumidifier on the market today.
Signs You Need a Dehumidifier
Avoid placing it too close to walls, which can restrict air intake, and keep it away from doors, windows, and air vents to prevent drafts. Ideally, position your dehumidifier near the primary source of dampness for targeted moisture removal, or in a central location like a hallway for general air quality improvement.
So, switch it on, and save yourself the hassle of mould and dampness later! While your dehumidifier's on, keep your doors ajar. Dehumidifiers can't attract the moist air with the doors closed! Opening your doors slightly allows sufficient airflow so your dehumidifier can do its job.
The single most important factor in dehumidifier placement is positioning your unit in a central, open area of your basement. This allows for optimal air circulation and ensures even moisture removal throughout the entire space.
For now, we leave you with this simple one: use a dehumidifier during the spring, summer and early fall to keep moisture at bay, but unplug and stow it away during the winter to prevent damage to your unit.
Signs of High Humidity
If you're spotting mold in corners, on walls, or in the bathroom, your home's humidity is too high. Musty Smells: A persistent musty smell is a dead giveaway that there's too much moisture in your home. Ideally, you want to keep your home's humidity between 40% and 60%.
The best time to use a dehumidifier is whenever your indoor relative humidity persistently rises above 50-60%. The ideal, healthy target for your home is between 40% and 60%. Run your unit during humid summer months, after water leaks, or whenever the air feels muggy and stale.
To draw moisture out of a room, use a dedicated dehumidifier, or natural absorbers like DampRid, calcium chloride, and baking soda. Active methods include ventilation with fans, air conditioning, and placing desiccants like silica gel in enclosed spaces.
So, why is your house so humid, and what causes high humidity indoors? The short answer is that more moisture is being trapped indoors than your HVAC system can remove. Air leaks, poor ventilation, or an air conditioning system that's not working correctly can all exacerbate the issue.
The cheapest and most effective homemade moisture absorber uses calcium chloride (sold as bulk driveway ice melter) combined with a simple two-bucket or colander-over-bowl system. This DIY approach costs a fraction of commercial products like DampRid and works identically to pull water from the air.