Stadler Form Hydra Ultrasonic Cool Mist Humidifier Review

Stadler Form Hydra Humidifiers
Stadler Form Hydra Humidifiers

The Stadler Form Hydra ultrasonic humidifier is a no frills product that will humidify a good size area at a very fair price. It is able to hold 1.6 gallons of water with maximum moisture output of up to 2 gallons a day providing medium to large room coverage. It is ultra silent and very easy to set-up and operate.

1. Room Coverage
2. Level of Quietness
3. Filter Life & Cost of Replacement Cartridges
4. Amount of Maintenance Required
5. Anti-bacterial Features
6. Ease of Filling
7. Ease of Operation and Filter Replacement
8. Quality of Construction
9. Humidistat to select desired humidity level & hygrometer to display the actual humidity in the room
10. Frequency of Filling
11. Value for Price


  • Provides effective humidification of up to 440 square feet
  • Tts ultrasonic technology provide ultra silent operation
  • Triple water quality protection includes the silver ionic cube, demineralization cartridge and ultrasonic technology to prevent bacteria, germs, and minerals
  • Filters are simple to replace
  • It is very easy to operate with manual controls


  • The cost to maintain it can reach the purchase price in 1 to 2 years
  • Although it has an adjustable humidistat we wish it was a bit more sensitive
  • There is no hygrometer to display the actual humidity in the room


The Stadler Form Hydra ultrasonic humidifier is a cool mist ultrasonic humidifier that provides enough moisture to the air to humidify a room up to 440 square feet. It is simple to operate and offers the water protection of the more expensive models. We like that slight improvements were made to provide a manual adjustable humidistat along with a separate control for the mist output. The only issue we had with these new features was that the humidistat knob needed to be opened all the way up before the humidifier turned on so it did not appear to be very sensitive. However, we are happy to be able to offer an inexpensive humidifier that is well built and delivers more than one would expect.

Links: Stadler Form Hydra Humidifier | Humidifiers | Stadler Form Humidifiers