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HUMIDIFIRST
INTRODUCTION
Congratulations on your purchase of a HUMIDIFIRST Mist-Pac ultrasonic humidifier –
the highest quality and most “User Friendly” commercial/industrial humidifier available
today. Your selection of an ultrasonic humidifier provides you with the benefits of this
technology, including energy efficiency, minimal maintenance, and healthy,
uncontaminated moisture. And HUMIDIFIRST humidifiers are 100% American
made.
HUMIDIFIRST humidifiers are made of ABS plastic. This ensures unit longevity,
minimal maintenance, and a clean, healthy humidifier.
UNDERSTANDING HUMIDIFICATION
Maintaining a specific relative humidity level in a building or a room is not an exact
science. Quality of construction, vapor barrier, air infiltration, and air exhaust all play a
role in the ability of a humidifier to maintain the relative humidity of a space. Also, some
older buildings may form ice in colder temperatures on the outside walls due to
humidified air seeping through cracks. Windows, too, may ice up when the outside
temperature drops. The type of window (e.g. single pane, double pane) can affect the
amount of window icing or sweating.
The level of relative humidity at which you maintain the space will also affect the amount
of window icing or sweating. For example, a building may have moisture problems at
50% RH but not at 30% RH.
Also, bear in mind that relative humidity may fluctuate in a given space. If you walk
around a large room with a hand held relative humidity meter, you may find variations in
relative humidity. This is typically due to variations in space temperature. Relative
humidity is “relative” to temperature, and hence changes in space temperature will affect
the relative humidity of the air.
