Dehumidifier

A dehumidifier is a device that pulls excess moisture from the air, helping you prevent mold growth, protect your belongings, and create a more comfortable living space. Whether you're tackling a damp basement, managing humidity in a bathroom, or improving overall indoor air quality, the right unit makes a difference. Angi connects you with pros who can recommend, install, or repair dehumidifiers to keep your home healthy.
Dehumidifier Service Articles and Advice
open style living room and kitchen
A whole-house dehumidifier is a necessity when the relative humidity levels surpass 50%. Find out who installs dehumidifiers—and why you need one—here.
Father looking at daughter while holding tablet computer in living room
High humidity can cause a host of problems in your home. Learn how to lower your home's humidity and maintain optimal indoor comfort.
A boho living room on a sunny day
How much does a whole-house dehumidifier cost? The final price can vary. Explore our cost guide to see what impacts the price and start budgeting now.
Humidity and moisture provide the ideal breeding ground for mold and mildew. Here’s how a dehumidifier prevents mold—and what else you can do to keep it at bay.
radon mitigation system in crawl space
Crawl space dehumidifier costs are worth it if you consider their effect on energy bills and avoiding moisture damage. Learn what makes up the total cost of the project.
Woman changing water container of a dehumidifier
We’re here to help if you’re wondering what size dehumidifier do I need? Our guide will help you choose the correct model for your needs.
Portable dehumidifier sitting in the hallway of a house
If your home feels like a rainforest, it’s time to determine why your house is so humid and how to get rid of the excess moisture.
A dehumidifier in the interior of a house
Why is your dehumidifier leaking? Unfortunately, this is a common problem. Read on to learn some of the reasons for this, as well as solutions for how to fix them.
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Common Dehumidifier Service Questions

To lower your home’s humidity level overnight, you can open your windows when the air is less damp. This tactic allows air to circulate around the window, preventing condensation from forming. However, you should consider the disadvantages of leaving your windows open overnight, including safety risks and pest intrusions.

No, musty odors in your basement likely won’t go away on their own, and they’re likely to get worse if the problem isn’t addressed. To fix the issue, you need to remove materials that have harbored mold or mildew and fix the underlying moisture issue, which is usually either an interior plumbing leak or a foundation leak from water in the soil outside. Once you address these problems, the musty odor should fade with time.

No, your basement dehumidifier doesn’t need to be on 24/7. While it’s an excellent tool for tackling damp, musty air, especially in humid seasons, leaving it running nonstop can backfire. Over-drying the space can mess with your sinuses, warp wood, and even crack certain materials. Instead, only use your humidifier when moisture levels rise above 50%, and then give it a break when the humidity levels drop.

You don’t always need to install a dehumidifier in your encapsulated crawl space, but it might be a good idea in certain instances. If you notice obvious signs of condensation, mold, or musty smells permeating from your crawl space, a dehumidifier can help. It’s ideal for homes in humid areas.

In a worst case scenario, structural damage like rust on metal beams, rotting wood, and swelling on doors and windows can signal moisture problems that would benefit from a dehumidifier.

Once again, contact with moisture is the culprit here, though water-resistant varieties of wallpaper are less likely to become wet and develop mold. Using a high-quality exhaust fan or dehumidifier and leaving the doors or windows cracked after bathing will keep this issue at bay.