SMS Twin Fan Controller 4.5A MK2

Size: Twin 4.5Amp
Sale price£99.95


The temperature in your grow space will vary throughout the day/night and throughout the year, having a controller to maintain fan speed accordingly is the best way to control this.

The ideal temperature for your plants is 24-28 degrees celsius when the lights are on and a drop of around 5 degrees in the dark period, thats hard to maintain if your fans are still going full power when the lights are off and drops in temperature will occur leading to slow growth and poor yields.

Did you know temperature drops below 18 degrees during the dark period can slow the processes happening inside plant cells so much that it can take up to 48hr for them to return to normal? If your room is dropping cold night after night your plants will be permanent state of suspension which can seriously affect your growth rates to a near standstill and massively drop your yields.


Connect your intake and exhaust fans to the sms controller and set your desired temperature, next set your minimum and maximum fan speeds, we recommend a minimum fan speed of no less than 20-30% to ensure adequate air exchange still occurs. maximum fan speed is normally set to 100% unless you are using oversided fans and dont ever need them to be on full or in the colder months when the need for air exchange is less.


  • Plug and play design - no wiring required
  • Compact neat design
  • 90cm power cable provided
  • Temperature probe included
  • Easy to use
  • Works with most fan types

Ideal for use with our range of Maxibright Tube Fans and standard filtration kits .


*Do not use with the ISOMAX range of fans or EC fans

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