Ecotechnics Evolution Temp/Humidity Fan Controller Shipping this boosts oxygen levels in

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Ecotechnics Evolution Temp/Humidity Fan Controller Shipping this boosts oxygen levels inEcoTechnics Evolution Digital Fan Speed Controller digital fan speed controller The Evolution Digital Fan Speed Controller monitors temperature and also humidity within your grow room and constantly adjusts the speed of your extraction and intake fans to maintain optimal growing and flowering conditions. The unit also controls a grow room heater and is compatible with the Ecotechnics Evolution CO2 controller. This controller can control multiple fans