Pan Humidifiers
A pan humidifier consists of a water tank (pan), heating coils, a fan, and a fan motor (see Figure 11-5). The heating coils are installed in
the water tank. Heat is supplied to the pan heating coils either by low-pressure steam or forced hot water where a water temperature of 200°F or higher is maintained.
The pan humidifier is completely automatic; the water level in the tank is controlled by means of a float control. When the relative humidity drops below the setting on the humidistat, the fan blows air over the surface of the heated water in the tank. The air picks up moisture as it travels over the surface of the water and is blown into the space to be humidified. When the humidistat is satisfied, the fan is shut off.
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