• Dehumidifier performance curves are data tables that indicate how a dehumidifier will perform at various temperatures and relative humidity levels.
• This data is critical for growers to understand how much water a dehumidifier can remove from a grow room under specific conditions. This is vital for properly determining how much dehumidification you need in a room.
• Most manufacturers promote how their dehumidifiers perform at 80 F /60% relative humidity (RH). While it’s an important baseline, it’s not the most important number. Focus instead on typical lights-off conditions.
• Your dehumidifiers will work hardest when lights are off, so size your dehumidification needs based on those conditions. A performance curve will help you understand how much water a dehumidifier can remove in that environment. It’s a simple – and often effective – way to determine how much dehumidification you need in your grow room. But as cannabis cultivation and our understanding of plant transpiration rates becomes more sophisticated, a performance curve is a much handier.The reason: Neither the water plants release nor the capacity of a dehumidifier can be assumed as constant throughout an entire day. Much like understanding the changes in a plant’s transpiration rate, a dehumidifier performance curve

  helps you quickly see how a dehumidifier operates under various conditions. The “curve” comes from plotting data that shows peak performance vs. the points where it falls off.

  So, with a performance curve, you can get into specifics. Need to know how much water a dehumidifier can remove at 75 F when plants are sleeping? No worries. What about at 65 F in a dry room? Easy.

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