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Twin Controller Humidity Control 8A manages air intake and exhaust in Indoor cultivation with automatic temperature and rH control. Model 8A (4+4) easy to calibrate, designed to maintain stable negative pressure and a discreet environment in tents and rooms.

The Twin Controller Humidity Control 8A brings together ventilation and climate control for grow tents and rooms in a single panel. The front controls MIN speed FAN 1 and MIN speed FAN 2 set independent minimums for intake and exhaust, ensuring constant renewal.
The Negative Pressure adjustment balances airflow and ensures a slight depression that prevents odor leaks, while the Humidity control helps smooth out humidity spikes.
When a temperature target is set, the electronics activate a 100% automatic control that modulates revolutions until the setpoint is reached with smooth transitions.
The unit works with automatic hysteresis of 2 ºC and 10% rH and applies a 1 ºC differential per step to prevent sudden rpm changes, reducing noise and vibrations. It incorporates a dual Tº/rH sensor for real environment readings, designed to be placed at canopy height.
Practical specifications: total capacity 8 A (4+4), thermal range 5–55 ºC, humidity range 20–100% rH, power supply 220/230 V 50 Hz, housing with IP44 protection and compact size 140 × 220 × 110 mm with rear mounting plate. Direct integration with carbon filters, soundproof ducts, and silencers for efficient air lines.
Available at Hydroponics Blanes, Grow Shop in Spain, with a catalog of cannabis growing accessories, selection of cheap indoor grow tents and discreet shipping.
Well-coordinated ventilation determines yield and plant health. Twin Controller Humidity Control 8A stabilizes temperature after lights turn on, keeps rH in the target range, and maintains negative pressure for maximum aromatic discretion in urban environments.
It is used to control temperature, humidity, and airflow through two independent channels. It allows you to set minimum rpm, balance intake and exhaust, avoid thermal oscillations, reduce noise from abrupt changes, and maintain a homogeneous climate in all phases of the cycle.
Among cannabis growing accessories, it stands out for its intuitive handling and compatibility with 100–200 mm extractors and intakes commonly used in tents. It fits with carbon filters and soundproof ducts, configuring balanced and quiet systems for home and professional projects.
Recommended when rH spikes appear at night, when increasing airflow due to new LED lights, if the room requires greater negative pressure, in case of marked differences between day and night, or when migrating from manual to stable climate automation.
1) Attach the controller with the rear plate (IP44 suitable for humid environments).
2) Connect intake to FAN 1 channel and exhaust to FAN 2 channel (up to 4 A per socket; total 8 A).
3) Place the dual sensor at canopy height, away from direct drafts and heat sources.
4) Set the target temperature; the system will start automatic control with 2 ºC hysteresis.
5) Set MIN speed FAN 1 and MIN speed FAN 2 to ensure permanent minimum renewal.
6) Adjust Negative Pressure until a slight depression is achieved (exhaust equal to or above intake).
7) Fine-tune Humidity according to the growth stage; check stability after 10–15 minutes and adjust if necessary.
8) Record readings by time slots to detect seasonal trends.
At Hydroponics Blanes you can purchase Twin Controller Humidity Control 8A with updated stock and expert support. Catalog of cheap indoor grow tents, ventilation, climate control, and cannabis growing accessories from a single Grow Shop in Spain.
Precise climate automation with Twin Controller Humidity Control 8A: balance between intake and exhaust, controlled rH, and stable temperature for a productive and quiet environment. Buy online at Hydroponics Blanes with technical advice and discreet shipping to any point in the country.