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The second edition of TechTime is here! TechTime is a new Neptronic publication aiming to inform you of common issues highlighted by our technical support team and the best way to deal with them. Each edition will contain three new topic and will be posted on neptronic.com.

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Making the Right Choice

Ultrasonic Humidifiers Vs. Electric Humidifiers

There are many types of humidifiers on the market and each has its pros and cons depending on the application. Ultrasonic and electric type humidifers are no exception and it is important to know the distinctions between the two to ensure maximum performance of the installation. Here is a table showcasing a brief overview of the main differences between those two types and the advantages of electric over ultrasonic humidifiers.

Ultrasonic versus SK300 Neptronic electric steam humidifiers





Adiabatic humidification systems use mechanical energy to generate water particles. (Ultrasonic – piezoelectric transducer)

Isothermal humidification systems use electricity as an external heat source to change water to steam. (Electric resistance)

Generated Steam

The ultrasonic generates a cold mist which is the reason why the power consumption is low.


Neptronic humidifiers boil the water inside an evaporation chamber to generate clean steam.

Water Types

This type of humidifier requires a RO water filtration system to supply clean water to the humidifier.

It cannot be supplied with tap water.

The minerals from the water will be carried into the airstream and will appear as dust.


It can be used with tap, RO or DI water.

Neptronic humidifiers have a stainless steel cleanable evaporation chamber which can be easily be removed for maintenance.


Winter Season Operation

If humidification is required during the winter seasons then the cooling of the air temperature must be considered in the heating load calculation as ultrasonic humidifiers provide a cooling effect.


Neptronic humidifiers provided hot clean steam which could add a small heat gain during heating season

Output capacity

For large output, it will require multiple units


Neptronic humidifiers have a wide range of models from 6 to 270 lb/hr with a single unit.


Hygienic Operation

Since the water is not boiled to produce a mist, there is a risk of bacteria present in the mist and being discharged into the room. Disinfecting the humidifier becomes even more important than with a humidifier that boils the water.

Neptronic electric humidifiers generate clean hot steam because they boil the water inside the evaporation chamber.


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David Wong

Technical Support – Humidifiers

Contact him at this email address david@neptronic.com