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THE SINGLE SMSCOM CONTROLLER IS USED TO CONTROL THE SPEED OF ONE EXTRACTOR FAN.
THE SMSCOM ENVIRONMENTAL CONTROLLER IS A DUAL PURPOSE FAN SPEED CONTROLLER AND THERMOSTAT. THIS UNIT THERMOSTATICALLY CONTROLS BOTH EXHAUST AND INTAKE FANS SIMULTANEOUSLY. THIS PRODUCT IS HIGHLY RECOMMENDED FOR EASE OF USE AND SIMPLICITY. TAKES THE GUESS WORK OUT OF CONTROLLING YOUR ENVIRONMENT.