How Do I Use My Honeywell humidifier? Instructions To Follow

Many people ask: How do you operate a Honeywell humidifier?

If you have bought yourself a Honeywell HCM 350 Germ-Free humidifier or any other of their models, you might be asking about the Honeywell humidifier instructions for use, storage, cleaning, and so on.

In this blog, we have looked at this brand name in the past. For instance, we looked at why Honeywell humidifier produces a burning smell.

We also looked at Honeywell humidifier water level not going down.

Today, we look at a set of humidifier operating instructions that you could use across different models under this brand name.

The Honeywell HUL520 Cool Mist Humidifier that you can buy on Amazon is very popular. It is a filterless unit, so it requires slightly less maintenance.

Read the Honeywell Humidifier Manual

Honeywell Humidifier Manual

For any Honeywell humidifier instructions, get the user manual and read it fully. It contains all the information you need for setting it up, operating it, cleaning, storage, and even transportation.

When it is delivered to your home, it will come with a user manual. If it does not have one, don’t fret. You could always download one online, on

This is our go-to website for all user instructions for different types of appliances, including Crane humidifier instructions.

If you have used an ultrasonic cool mist humidifier before, you will find that they all run on the same technology, except that some, such as the Vicks humidifiers come with VapoPads.

Still, even if this is your umpteenth humidifier to buy and use, it’s a good habit to refer to the user manual. There might be some outstanding differences between it and other models or brands.

You can also check out the official website. You will find a page for registering your product for warranty.

How to set up Honeywell HUL520BC Humidifier

Honeywell humidifier cleaning instructions

The humidifier comes in a box, assembled, and almost ready to use. Remove the plastic wrapping and place the unit on a flat surface.

How to fill the tank

You will need to remove the tank so that you can fill it with water. This is not a top-fill humidifier, so you will have to remove the tank, turn it upside down, and fill it with distilled water.

This is an ultrasonic humidifier, so it can leave white dust on your surfaces if you use water that has minerals.

Tap water usually has minerals, so you should avoid using it in this humidifier.

The capacity of this tank is 0.5 gallons. It can run for 18 hours at a moderate mist speed setting before it needs refilling.

How to position the Honeywell humidifier

First, you can use this humidifier in a baby’s room because it is a cool mist. There is no hazard of scalding from boiling water.

Secondly, to get maximum benefit, place this humidifier 12 or more inches from the wall for the best airflow.

Thirdly, you should not place it on the ground, on the carpet, or on a wooden table because there will be spills.

Remember what we said in our post on whether to place a dehumidifier on the floor or high? The same applies here. Place the unit at least 2 feet from the floor.

Fourthly, position the humidifier close enough to a working socket. Plug it in and give it some time to start pumping mist. New humidifiers take longer to start working.

How does the Honeywell Humidifier work?

Always start with the basics by knowing how a product is designed to work.

This is one of the easiest-to-use humidifiers on the market. Getting the settings right is not a problem at all.

Remove the tank, turn it upside down, and unscrew the cap. Fill the tank with cool water. Never run a humidifier without water.

Never place the humidifier on the carpet or mat. The heat vents are located at the bottom.

Also, place it a foot away from the wall. The manufacturer says 6 inches, but even bigger is better to ensure there is proper air circulation.

How it works

As an ultrasonic humidifier, it has a diaphragm that vibrates at a very high frequency, thus turning water into very tiny droplets. These droplets are then released into the air as mist.

The water drops into the nebulizing chamber from the tank gradually. This is where the diaphragm is, and it vibrates so fast, breaking the water into minute droplets.

The mist is dispersed in the air, raising the humidity level in the space.

To set the mist output on this humidifier, use the control dial that is on the base. Turning it a few times will hit the maximum mist output.

Turn the power knob, which is also the humidity setting knob, to the highest setting. Also, keep an eye on your hygrometer to know when you attain a humidity level of 40 to 55%. Then turn the power knob down to the lowest setting.

Honeywell Humidifier Safety Instructions

Honeywell Humidifier Safety Instructions

Before using the unit that you buy, you want to know its safety instructions. They are as follows:

Placement: On a solid surface, 2 feet above the floor and 6 to 12 inches from obstacles

Electricity: The power cord is short, so place the unit close to a socket. Ensure there is enough power in the socket, or it will keep turning off.

Do not use an extension cord. Just plug it into the socket directly.

Water: Do not fill it to the brim, and do not run it without water. Keep the mist lid open when the humidifier is running

Unplug the humidifier if it smells like burning. Unplug it after use, before cleaning, before filling the tank, and after every use.

Storage: Don’t store if the tank has water. Clean the humidifier tank and base. Air-dry completely before storage.

Use this appliance indoors only, and this is for the space that it is rated for. Never use it outdoors.

This humidifier has an auto-shut-off function. When it runs out of water, it will simply shut down.

Honeywell Humidifier Instructions for Troubleshooting

Occasionally, you will find that your humidifier does not work properly. Luckily, the Honeywell humidifier instructions include a troubleshooting guide, as follows:

The power knob is on, but its light is off: the Humidifier is not plugged in. If it is, check whether you have a dropped circuit breaker. If everything seems okay, check the power cord and the fuse.

The humidifier does not produce mist; check whether it has water. Check whether the nebulizer has a mineral scale. Also, check whether the mist setting is on low.

Overflowing reservoir: Unplug the humidifier and check that the tank lid is tight. If yes, find out whether the tank seal is intact and whether the tank is damage-free.

Condensation on surfaces and windows: The humidity setting is too high. You need a lower setting by adjusting the knob.

Humidifier won’t turn on: If there is no power, the power cord is broken, the fuse is blown or there is not enough power in the socket.

Honeywell humidifier cleaning instructions

Honeywell humidifier cleaning instructions

To keep the unit working efficiently, you need to keep it as clean as possible. If you use the Honeywell HUL520BC frequently, clean it after every use. If you use tap water in the unit, clean it after every use, paying special attention to the nebulizer.

Humidifier cleaning process

Unplug the unit from power, and then remove the tank from the base. Remove the tank cap and ensure the rubber seal stays intact. Pour the water into the sink.

Add 2 cups of white vinegar to the tank. Put the tank cap back and then swish the vinegar around the tank. Place the tank on the base and leave it that way for 20 minutes. This will allow water to drip onto the nebulizer to remove the scale.

Remove the tank from the base, open the cap, and pour out the white vinegar. Rinse the tank with clean water until the smell of vinegar is gone.

Use a soft piece of cloth to rub the nebulizer and remove the loosened scale. Wipe the base clean with a piece of cloth. Never soak it in water.

Conclusion: Honeywell humidifier instructions

Honeywell is one of the best brand names for air purifiers, humidifiers and dehumidifiers.

For every product, there is a detailed user manual. Check it before you start using the unit that you’ve bought.

Referring to the user manual helps you get the most out of your humidifier. Besides, you don’t want to do something that will void the warranty.