The humidifier shall be a packaged, self-contained ultrasonic humidifier using the principle of ultrasonic nebulization. Each humidifier shall use a multiple of ultrasonic transducers that vibrate at approximately 1.6 megahertz, producing a droplet size of approximately 1 micron. Each transducer circuit shall use the "thickness vibration method" of humidification via a piezoelectric converter. The ultrasonic transducers shall convert the electric energy into mechanical energy, causing the water to cavitate, resulting in the production on one micron sized water particles. The design of the humidifier housing shall prevent larger droplets from leaving the humidifier assembly. The humidifier shall consume no more than 33 watts per pound of humidification generated.

The ultrasonic humidifier shall not produce any unacceptable noise. The sound level shall not exceed 64 db at 10 feet from the humidifier module.

The ultrasonic humidifier shall not require a flush cycle. The humidifier basin and structure shall be made of stainless steel and powder coated aluminum.

Evaporation of the mist shall occur inside of the humidifier when the relative humidity of the space is 40% or less.

A ¼" tube water quick-disconnect shall be provided for connecting water to the humidifier.

A 6 foot, 120 volt power cord with receptacle shall be provided to plug the unit into a standard wall outlet.

Each humidifier shall have the following components:

* Solenoid valve to control water flow into the humidifier
* Float switch to control water level
* Float switch to provide for low water shutdown
* Piezoelectric crystals (transducers) * On/off electronic humidistat