Temperature and Humidity: Difference between revisions

Temperature and humidity share a single article as they are so closely linked. Generally, humidity in a growing context refers to [https://en.wikipedia.org/wiki/Humidity Relative Humidity] (RH). As temperature decreases the amount of water vapour it can hold before it condenses back into a liquid decreases. In other words, hotter air can hold more water vapour per volume than cold air can<ref>https://www.royalqueenseeds.com/blog-indoor-cannabis-growing-relative-humidity-and-temperatures-n243</ref>. In fact, this is the principle that freeze -drying relies on. Temperature and humidity can also be used to calculate the Vapour pressure deficit (VPD) which provides an indication toof the cultivar's capacity for [[Plant processes#Respiration|gas exchange]].

In Indoor grows, ventilation is athe verymost importanteffective partway of having control overinfluencing the temp and humidity of the environment. As the plant expels water vapour via [[Plant processes#Transpiration|transpiration]] the air becomes more humid and this eccessexcess water vapour must be removed from the growgrowing environment. In other words, a fan to remove humid air is crucial. Blower (centrifugal fans) should be used for this type of ventilation<ref>Centrifugal Fan vs Axial Fan | Industrial Accessories Company - https://www.youtube.com/watch?v=gYxLbBP3evM </ref>. To control the smell emitted from the plant, [[Carbon filter|carbon filters]] are often implemented as part of the exhaust of the ventilation.