Traditional negative pressure applications are being phased out as Positive Pressure is a trending method of increasing environmental protection from outside pests as well as offering much better control of temperature and humidity.

 

Positive pressure cooling systems pull outside ambient air into a cooling chamber where the air is screened for bugs, then chilled through humidity. The capital expense of this option is the highest as well as the ongoing energy use expenses are the highest. It is however, the most accurate control. In this option, growers have the end result of an indoor growing facility with complete control of temperature and humidity, but one key factor that makes this option attractive in todays cannabis market–Natural sunlight! That sunlight, has played a major role in exchanged, rather, the crop canopy is always having fresh chilled air blowing on it. By forcefully blowing this chilled air under the plants, it escapes the opening passing through the soil or root structure of the plants, then forcing itsway through the canopy. In this design, the leaves are constantly moving helping to strengthen the plants, cool the plants, as well as fight off white mold and other diseases especially in the flowerstage of cannabis while also providing enough air flow to force away any insects that may already be in the greenhouse.

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