Filter-Free Cool Mist Humidifier

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The Filter-Free Ultrasonic Cool Mist Humidifier quietly produces a visible, cool mist that helps make you and your home more comfortable.

- Filter-Free
- Ultra Quiet
- Directional Mist Outlet

Product Details

  • Details & Dimensions

    Maintaining proper humidity levels helps temporarily relieve dry air discomforts and helps to keep throat and nasal passages hydrated. The Filter Free Cool Mist Humidifier provides soothing moisture for dry air relief. Features include a large tank opening for easy filling and cleaning, directional mist outlet, and adjustable mist control. Ultra quiet operation make it ideal for bedroom use.

    SKU: HUL535B/W
    Room Size: Medium
    Tank Size: 1 gallon tank
    Run Time: up to 24 hours
    Dimensions: W 8.15" x H 13.03" x L 8.57"

  • Manual & FAQs

    Question: What is the white dust on my humidifier?

    Answer: High mineral content in your water, also known as hard water, may cause a white mineral residue to accumulate on surfaces in the room near the humidifier. The higher the mineral content (hardness) of your water, the greater the potential that an Ultrasonic humidifier may produce white dust. White dust is not a result of a defect or flaw in the humidifier. It is a result of the amount of mineral suspended in the water you are using.

    To minimize the amount of white dust, use a mixture of distilled water with tap water in your tank.

    Question: How do I clean my humidifier?

    Answer: Follow the step by step instructions below to clean your Honeywell Cool Mist Humidifier. You can also view the How to Clean video here: https://youtu.be/i6sajEcIj0w

    Before Cleaning:

    • Turn off and unplug humidifier. Never clean the humidifier when it is running.
    • Remove Water Tank and empty completely. Remove any accessories from the water tank.

    Scale Removal:

    • Turn off and unplug the humidifier.
    • Remove Water Tank from Base. Remove Mist Outlet from top of Water Tank and set aside. Remove Tank Cap, taking care that black rubber Cap Seal does not come off. Empty water from Water Tank and Base.
    • Add 2 cups of undiluted distilled white vinegar to Water Tank. Replace Tank Cap and swish vinegar solution around in Tank. Place Tank on Base. Vinegar solution will drain into Water Reservoir and loosen mineral buildup (scale) on Nebulizer and Float as they soak in the solution. It will also loosen scale on bottom of Water Tank. Soak for 20 minutes.
    • After soaking, unlock Tank Cap and pour solution out in sink. Use solution from Water Reservoir to wipe the underside of the Mist Outlet with a clean cloth. Pour solution from Water Reservoir out in sink. Gently wipe Nebulizer and Float with soft cloth to remove loosened mineral deposits. Rinse Water Reservoir and Water Tank until smell of vinegar (for Scale Removal process) or bleach solution (for Disinfecting process) is gone. Make sure water es not enter the fan opening (vented opening in back of base) or Power Knob.

    Descaling:

    • Follow Steps 1-3 in Scale Removal Instructions in previous section.
    • For Step 4: Add 1 tsp of bleach to 1 gallon (3.8L) of water and add to Water Tank. Replace Tank Cap. Swish solution around in Tank. Place Tank on Base. Bleach solution will drain into Water Reservoir and will disinfect Water Reservoir and other components as they soak.

    NOTE: Using more than 1 tsp. of bleach per gallon of water may result in damage to your humidifier. See steps 5-8 in Scale Removal Instructions in previous section to complete Disinfecting process.

    NOTE: Do not mix vinegar and bleach solutions together. Scale Removal and Disinfecting must be done separately.

    For additional FAQ or post-purchase support, please visit our support page.

  • Videos

    How to Use
    Learn how to use your Honeywell Ultrasonic Cool Mist Humidifier HUL535 by following these easy steps.
    How to Clean
    Follow these easy steps for cleaning your Honeywell Ultrasonic Cool Mist Humidifier HUL535.
  • Warranty

    3 Year Limited Warranty

    What You’ll Need to Register Your Humidifier:
    1. Model number for each product you purchased
    2. An email address. We will use this to send you confirmation of your registration
    3. The purchase date of your product

    Warranty Registration

What You Need to Know About Your New Humidifier

Whether you need relief from cough and congestion, a better night's sleep or you live in a dry climate, we have a humidifier for you.

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