5 Best Type of Humidifier for Hard Water | How To Choose

Choosing the best humidifier for hard water can be a little tricky. Have you ever tried cleaning your humidifier and you discover grey, the whitish or brownish residue at the misting part of the unit? Or are you aware that the kind of water that runs through your tap/environment is hard water? The residue is the high mineral content of the hard water made available to the unit. It is, therefore, high time you invest in a humidifier for hard water.

When using a humidifier, the quality of its output is dependent on so many factors, one of which is the water used to fill the tank. Hard water can buildup mineral residues on an ordinary humidifier, and this can damage the unit since it is high in mineral content.

When distilled water is not available, you need a humidifier that is specially meant to deal with hard water. With the best humidifier for hard water, optimum enjoyment and health are guaranteed.



Our Reviews

Boneco S450 Digital Steam Humidifier

  • 3.5 gallon per day

  • 860 square feet

  • Perfect for large room

  • On/off timer

  • No filters required

Yougettech Digital Hard Water Humidifier

  • 4 speed settings

  • Auto shut off

  • Washable filter

  • 9 gallon capacity

Stadler Form O-021 Evaporative For Hard Water

  • 2 output levels

  • 2.4 gallon capacity

  • 540 square feet

  • Essential oil diffuser

  • Washable filter

Taotronics Warm And Cool Mist For Hardness Of Waterv

  • 2 output levels

  • 2.4 gallon capacity

  • 540 square feet

  • Essential oil diffuser

  • Washable filter

Pure Guardian H7550 Ultrasonic

  • 2 output levels

  • 2.4 gallon capacity

  • 540 square feet

  • Essential oil diffuser

  • Washable filter

Reviews Of Top Five Best Humidifier For Hard Water

1. Boneco S450 Digital Steam Humidifier

Looking for the best humidifier for hard water? If yes, our reviews featured some of the top rated humidifier following consumers reports

BONECO S450 is a powerful steam humidifier system that is great for hard water. This is because the system begins to work by heating the water to the boiling point. The emerging steam/vapor from the unit then humidifies the air. This innovation is a great way to eliminate bacteria and any mineral that might be present in the water since it will be heated to 212 degrees Fahrenheit.

The S450 model has an easy to read digital display and touches control feature and an auto-light dimmer that reduces light when you sleep. Amazingly, it has an auto-cleaning mode that will automatically clean the inside of the unit – all you need to do is rinse. Its skin safe warm steam will not burn; hence it is safe for use around children. It has a dimension of 14.0 x 9.5 x 13.2 inches and a weight of 10pounds.


  • Small fragrance container is present for essential oils
  • Digital display
  • Cleaning mode for decalcification
  • No filters needed


  • This unit is loud and quite noisy


2. Yougettech Digital Hard Water Humidifier

  • Yougettech Digital Hard Water Humidifier

YougetTech evaporative humidifier is a 4-speed constant humidifier that covers all your needs. It’s every detail and feature suggests that this unit is top quality and excellently made just for you. 

This humidifier comes with a sensitive humidity sensor, which adjusts automatically to your suitable humidity. In its operations, there is no foggy output. The filter in this unit is washable, thick, and designed to make humidification efficient.

YougetTech digital evaporative humidifier has a large water tank capacity of about 15litres, an output of 3000ml/h at the maximum output level, a timer that can be set as 1-24hours, a sleep mode, a weight of 20pounds, and a dimension of 14.4 x 24.4 inches.


  • Cost-effective
  • Simple and stylish appearance
  • Quiet humidification
  • Auto shut-off


  • Internal humidistat is not accurate.


3. Stadler Form O-021 Evaporative For Hard Water

The O-021 is economical; this is one important factor you cannot overlook. If you are concerned about energy consumption and want a humidifier for hard water with low power consumption, then Stadler form O-021 evaporative cool mist-less humidifier is the right choice. 

This humidifier switches off automatically when its water tank is low. It is suitable for aroma diffusion and has a filter reminder that reminds you to change the filter frequently.

Other features of this unit include the LED display, which can be dim. It is, exclusively, a cool humidifier, has a water tank capacity of 2.4gaallon, weighs 6.38pounds, and has a dimension of 9.69 x 9.7 x 11.4 inches.


  • Near silent
  • Easy to fill
  • No white dust
  • Essential oil diffuser


  • Difficult to clean


4. Taotronics Warm And Cool Mist For Hardness Of Water

TaoTronics humidifier with a 6L water capacity does its humidification duties flawlessly. This humidifier provides both cool and warm mist depending on your choice at a time. It comes with a remote control which makes controlling and modifying the settings of this unit easy and convenient. This humidifier is easy to clean and allows you diffuse essential oils too.

It is perfect for large rooms, quiet, and has an LED display light that turns off in sleep mode. The ultrasonic humidifier will automatically adjust to maintain a healthy and comfortable indoor humidity. The cool mist will turn on or off when the desired humidity is reached or dropped.


  • Dual mist humidifier
  • 6litres water tank capacity
  • Holds back bacteria and mineral residue from hard water
  • Whisper quiet and remote-controlled


  • The unit can only be placed on solid-surfaces, due to the fan located beneath


5. Pure Guardian H7550 Ultrasonic

Pure Guardian H7550 humidifier is one that can run for as long as 90-hours. Its water tank of 1.32-gallon capacity is lined with silver-clean protection that fights the growth of bacteria, mold, and mildews in the tank. It also makes cleaning the tank easy to clean, especially after use with hard water.

H7550 disperses both warm, and cool mists as needed, and its coverage can be extended by using the wand that comes with this unit. The product dimension is 5.12 x 9.78 x 13.98 inches. 

It is extremely light and weighs about 6pounds only. Additional features include a digital display, timer, 3-speed mist control, night light, and a low water level indicator.


  • Handle makes it easy to lift
  • Easy-to-use display control
  • Very quiet
  • Auto shut-off


  • Internal hygrometer is not accurate


Difference Between Hard And Soft Water

The softness and hardness of water play an important and direct impact on appliances and energy usage.

Hard water is that water that contains an appreciable amount of dissolved essentials minerals. Hard water is highly concentrated in dissolved minerals. These minerals include but are not limited to magnesium and calcium. Soap is less effective in hard water due to its reaction with calcium and magnesium. To some, hard water is good to taste while soft water is salty.

On the other hand, soft water is a treated one in which the only ion present is sodium. It forms a healthy lather when combined with soap because it contains very little or no calcium and magnesium.

Why Should I Need A Humidifier For Hard Water

Humidifiers can ease the problems caused by dry air in your house and room. However, the output mist and cooled air from the humidifier can be altered by factors of which the kind of water used is one. 

The residue from hard water will damage an ordinary humidifier. Also, this humidifier will not hold back potential harmful microorganisms and bacteria.

Therefore, it is relevant to get a humidifier for hard water to provide healthy cool air in your room. This hard water humidifier is built to hold back bacteria and mineral substances without its being-damaged.

Features To Consider When Buying Humidifier For Hard Water

There are quite a several features to consider when buying a humidifier for hard water. You should take due diligence to make your purchase count and invest your money wisely in the best humidifier for hard water. Some of these are

  • Type of humidifier based on mechanism

These mechanisms could be evaporative, steam, or ultrasonic. Ultrasonic and evaporative humidifiers are best for use with hard water. This is because it cuts down on the mineral substance present in the water alongside bacteria and impurities.

  • Cool or warm mist

For hard water, a humidifier that gives a cool-mist output will require a filter, but that with a warm mist does not require a filter because the heat is enough to get rid of bacteria and minerals. A humidifier for hard water with both mist output is an excellent choice.

  • Coverage

Measure the room/house in which you intend to use the humidifier for hard water in square footage. It is necessary to choose a humidifier that would give an efficient and saturated output for the intended space.

Read Also: 5 Best Humidifier with Humidistat Discussion | How to Choose Wisely

Conclusion & Recommendation

This best humidifier for hard water discussion has been well detailed. Therefore, if you want to buy purchase a unit of humidifier that can withstand hard water, following the information provided here is going to help you find the right product.  

Nevertheless, BONECO DIGITAL STEAM HUMIDIFIER S450 stands doubtlessly as to the best of the top five best humidifiers for hard water. Its special features and characteristics make it stand out amongst the rest. Ease and convenience is the mantra of this model, as it makes operation, control, and cleaning so easy. It is portable, lightweight, and has a small container made for essential oil diffusion. Since it’s dual functional, its warm mist does not burn, and the cool is just perfect for kids. This is safe for use in the bedroom, office, and around children.

The next in line is the STADLER FORM O-021 EVAPORATIVE COOL MISTLESS HUMIDIFIER.  Standler form O-021 is renowned for its economical conservation. It consumes a reduced power while conserving energy. It is healthy, easy to clean, and features an automatic shut-off when the water tank is low or empty. Also, this unit has a filter reminder that reminds you to change the filter when necessary. It allows for essential oil diffusion and gives a bright LED display that can be lower in sleep mode.

See also  5 Best Humidifier with Humidistat Discussion | How to Choose Wisely