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 isthe number of minutes you want the fan to run after the bathroom light has beenturned off. The delay time provides additional run time of the fan to completeventilating the bathroom after use.
When a person enters the bathroom and turns on the light, the fan is alsoenergized. After the person leaves the bathroom and turns the light out, thefan continues to run for the set delay time. In addition once an hour the fanis energized for the set ventilation time.
What makes this switch particularly unique is that the microprocessormonitors manual operation time and Delay time and subtracts it from the sethourly ventilation time. For example, with a 20 minute Ventilation setting anda 10 minute delay setting, a person enters the bathroom and uses it for 5minutes. The fan will continue to run for another 10 minute delay time. Thattotals 15 minutes of run time for that hour. The microprocessor will subtractthat 15 minutes of operation from the 20 minute set ventilation time and at theend of the hour, the fan will only run for 5 additional minutes.
To cancel DELAY time for the toggle version, turn the switch off and back on again within three seconds.
Within another three seconds, turn the switch off and the fan will shut off canceling the DELAY for that use.
For the Rocker version, simply turn the switch off again after use.
The fan will automatically come on once per hour for the pre-set VENTILATION time.
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.
If the switch is connected to a fan/light combo in addition to the primary bathroom light, will the fan light also come on any time the fan is engaged?