Humidistat controls work best for applications requiring 80% RH or less. If you need to maintain RH above 85%, do not consider using a mechanical humidistat control.
If you are interested in evaporative cooling and have thermostatically controlled exhaust fans, using a humidistat control is a great choice. The two independent systems will work very well together, for cooling as well as for providing a maximum set point for relative humidity control.
Operate the Turbo XE continuously and use the flowmeter panel to control the fogging output to maintain the desired high humidity level.
Humidistats are generally not reliable in high humidity applications. For dependable control of a high RH application, it is best to operate Turbo XEs continuously. Using an appropriately sized flowmeter panel allows for simple and dependable control of the high humidity level.
This application requires switching between two different fogging outputs. This is a common requirement in greenhouse propagation.
The low fogging output is used when ventilation is not occurring, while a much higher output is needed when the ventilation system is active. The fogging system will have to either be manually adjusted or a Two-Stage Timer Control can be used to automate between the two different fogging outputs.
The equipment used at games is similar; however, those fan systems have nozzles and are designed to produce water particles large enough that they can be projected into contact with players, and the high volume fan evaporates the small droplets off the player, resulting in rapid heat removal directly from the player’s surface.
In most cases, you cannot create evaporative cooling in an indoor environment; however, if there’s a strong ventilation system available, and a significant increase in humidity would not have a negative impact, then it is possible.
Every gram of water that evaporates absorbs 536 calories of heat, producing humidity that builds quickly. Without ventilation, cooling effects attenuate quickly as the humidity builds. At 100% RH, no cooling occurs.
For best results, measure RH using a quick responding digital humidity indicator with a range up to 100%. Please note: the device should not be kept inside the application room for extended periods of time.
If you want a less expensive way to measure RH, or want to monitor the humidity in the application area for extended periods of time, then place a block of aluminum and a block wood next to one another. The aluminum will attract condensation at 85% RH and the block of wood will attract condensation at 100% RH. So maintaining a wet block of aluminum along with a moist block of wood is a good indicator that you are near 100% RH.