Mk2 SMSCom Hybrid Fan Speed Controllers are the simplest, quietest and most efficient way to regulate the output of in-line duct fans –just plug them into the controller, set the dials and let the on-board computer system do the rest. Hybrids completely remove buzzing and humming noises by combining heavyweight transformers with clever digital technology. This model is the most popular in the range – and it’s now been upgraded at no extra cost! It features a ‘maximum’ setting so that you can use over-sized fans without them ever kicking in at their full output level. The Pro’s light sensor can be used to increase extraction levels for 7 minutes an hour during darkness hours, lowering humidity levels and preventing issues with rot.

SMSCom Hybrid 4 Amp product Specifications:

• Extremely quiet – totally eliminates issues with buzzing and humming
• One of the few controllers to be recommended for use with Isomax fans by their manufacturers, Can.
• Accurate temperature readings
• Maintains a constant climate
• Very simple to operate
• Regulates minimum fans speeds
• 4.5 metre temperature probe cable
• 4amp version handles a 900W load