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It's finally spring! Which means now is the time to invest in a quality humidifier. Here are three great deals as of March 21.

• BEST BUDGET PICK: The Levoit 3L humidifier provides 25 hours of moisture — $29.98$43.99(save $14.01)

• BEST SMART OPTION: The Levoit Dual200S is Alexa-compatible and features an upgraded NoiseDefender design for light sleepers — $39.98$54.99(save $15.01)

• BEST FOR LARGER ROOMS: The Levoit 6L humidifier can cover up to 505 feet — $70$79.99(save $9.99)

Running a humidifier can alleviate seasonal allergies and keep your nasal passages moist and comfortable (which is particularly important for those who like to blast the air conditioner all day and night).

How does a humidifier work?

Humidifiers add moisture to the air to prevent dryness, leading to irritated skin, scratchy throats, and uncomfortable sinus issues. Some people may use a humidifier to relieve cold and flu symptoms, eczema, sinusitis, and seasonal allergies.

That said, overusing a humidifier or using an improperly cleaned humidifier can cause bacteria and mold growth, so it's important to follow the manufacturer's instructions for proper use and maintenance.

What type of humidifier is best?

Of course, the type of humidifier that's best for you and your home will depend on your specific needs and preferences, your budget, and the size of the room you're trying to humidify. Some popular options include central humidifiers, impeller humidifiers, evaporators, steam vaporizers, and ultrasonic humidifiers.

To help you decide, here are our top three picks for the best Levoit humidifiers on sale at the time of this writing:

Best budget pick

Opens in a new windowCredit: LevoitOur pick: Levoit 3L humidifier

Why we like it

If you're on a budget (honestly, who isn't?), this three-liter Levoit humidifier is on sale for just $29.98, down from its original price of $43.99. That's a savings of 32% (or $14.01). In addition to being budget-friendly, this humidifier features an easy top-fill design, 25 hours of moisture, and a diffuser to transform your home into a spa within minutes. This gadget also includes an auto shut-off function and an extra powerful mist output — it can raise the humidity of a room by 10% in just 20 minutes.

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Best smart option

Opens in a new windowCredit: Levoit Our pick: Levoit Dual200S 3L humidifier

Why we like it

Need something with more oomph? The Levoit Dual200S is also on sale for $39.98, down from $54.99. This humidifier features smart technology (so you can control it via app or Alexa), an upgraded NoiseDefender (for light sleepers or little ones in a nursery), and an auto shut-off function that automatically detects low water levels — just set it and forget it.

Best for larger rooms

Opens in a new windowCredit: Levoit Our pick: Levoit 6L humidifier

Why we like it

The six-liter model from Levoit can humidify a room up to four times faster than a traditional humidifier. It can cover up to 505 square feet, so you can place it in larger areas such as the living room or office without worry. This humidifier doubles as a smart gadget, as it's compatible with Alexa and can be controlled via the VeSync app, which lets you monitor and adjust settings remotely. It also includes a special plant-care program that offers customized plant management tips and advice to help you better care for your indoor plants.