Twin Controller Mk2.1 - SMSCOMTwin Controller 4. 5A Mk2. 1 SMSCOM The Twin Controller is software controlled so reacts completely differently to the usual types of controllers. There is no need to adjust the speed of the fans yourself; the controller does it for you. When you first switch the controller on it will scan your room and calculate exactly how fast your fans need to run to maintain the temperature set, from that point on your room will remain at your desired temperature
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