Humidity

Needed Monitors:

(Good) Hygrometer

(Better) Monitor with switched fan Controller

(Best) Dehumidifier/Humidifier and a My Smart Grow system

(Free) Web tool: http://www.dpcalc.org/

The Humidity of the environment is represented by Relative Humidity %.  A higher percentage means that the air-water mixture is more humid. This is variable by different temperatures and pressure of the air. It requires less water vapour to attain high relative humidity at low temperatures and more water vapour is required to attain high relative humidity in warm or hot air and.