The Global Air Supplies Intelligent VPD Humidity Controller (IHC) is designed to automate humidity management in hydroponics and indoor growing environments. By monitoring temperature, humidity and light cycles, the controller calculates and maintains the ideal Vapour Pressure Deficit (VPD) for your plants. This helps create the optimal climate inside a grow tent or grow room, supporting healthy plant development, efficient nutrient uptake and improved yields.
Humidity plays a crucial role in plant transpiration. If the air is too dry, plants transpire too quickly and can absorb excessive nutrients, leading to leaf burn. If humidity is too high, plants struggle to transpire and nutrient uptake slows, limiting plant growth. The Intelligent VPD Humidity Controller balances these factors automatically by regulating connected humidifiers based on real-time environmental conditions.
Key Benefits
• Automatically maintains optimal VPD for plant growth
• Controls humidifiers based on temperature and humidity levels
• Built-in temperature, humidity and light sensor probe
• Separate day and night humidity settings
• Multiple control modes including VPD and relative humidity
• Warning display if the humidifier runs out of water
• Helps maintain stable grow tent and grow room environments
• Suitable for hydroponics, coco and soil indoor growing systems
How It Solves Grow Problems
Humidity imbalance is one of the most common issues in indoor growing environments. Low humidity can cause plants to transpire too quickly, leading to nutrient imbalances and leaf burn. High humidity can reduce transpiration, slow nutrient uptake and increase the risk of mould during the flowering stage.
The Intelligent VPD Humidity Controller calculates the correct humidity levels based on air temperature and plant leaf temperature. By maintaining the optimal VPD range, plants transpire efficiently, allowing roots to draw nutrients correctly while preventing environmental stress. This balanced environment supports stronger vegetative growth, healthier plants and improved yields during the bloom stage.
How to Use
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Connect your humidifier to the controller power outlet.
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Place the sensor probe at canopy height within the grow tent or grow room.
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Power on the controller and navigate to the main menu.
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Select the desired control mode (Relative Humidity or VPD).
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If using VPD control, measure leaf temperature using an infrared thermometer and enter the difference between leaf and air temperature.
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Set your desired humidity or growth stage parameters.
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The controller will automatically activate the humidifier when required to maintain optimal environmental conditions.
By maintaining balanced humidity and VPD levels, the controller helps create the stable environment plants need to thrive throughout vegetative growth and flowering.
