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The SmartExhaust is designed as a replacement for the bathroom fan and light switch, helping insure healthy indoor air quality as well as adequate bathroom ventilation. By using a microprocessor to monitor and control fan operation, a precise amount of ventilation can be provided
There are two settings on the SmartExhaust switch, ventilation and delay. Ventilation is the minutes per hour that you want the fan to operate. Delay is the number of minutes you want the fan to run after the bathroom light has been turned off. The delay time provides additional run time of the fan to complete ventilating the bathroom after use.
When a person enters the bathroom and turns on the light, the fan is also energized. After the person leaves the bathroom and turns the light out, the fan continues to run for the set delay time. In addition once an hour the fan is energized for the set ventilation time.
What makes this switch particularly unique is that the microprocessor monitors manual operation time and Delay time and subtracts it from the set hourly ventilation time. For example, with a 20 minute Ventilation setting and a 10 minute delay setting, a person enters the bathroom and uses it for 5 minutes. The fan will continue to run for another 10 minute delay time. That totals 15 minutes of run time for that hour. The microprocessor will subtract that 15 minutes of operation from the 20 minute set ventilation time and at the end of the hour, the fan will only run for 5 additional minutes.
Features & Benefits
Any manual fan operation and DELAY operation will be subtracted from the pre-set VENTILATION time for that hour. If manual fan operation and DELAY operation exceed pre-set VENTILATION time, the excess time will be subtracted from the next hour's total VENTILATION time.
If the VENTILATION dial is set to 20 minutes/hour, the microprocessor will subtract 20 minutes from 60 minutes and determines that the SmartExhaust needs to come on 40 minutes into the hour and run for the remaining 20 minutes of that hour. If the DELAY dial is set to 10 minutes and the light/fan switch is manually turned on for 4 minutes, the microprocessor will keep track of the 4 minutes of use. When the switch is turned off after the 4 minutes, the microprocessor will continue to run the fan for the 10 minutes of DELAY setting adding up to a total of 14 minutes. The 14 minutes will be subtracted from the total required 20 minutes of VENTILATION time. 54 minutes into the hour, the fan will turn on and run for the 6 minutes needed to complete the required ventilation.